ILLINOIS POLLUTION CONTROL BOARD
    July 26, 2007
    IN THE MATTER OF:
    )
    )
    SDWA UPDATE, USEPA AMENDMENTS
    )
    R07-2
    (January 1, 2006 though June 30, 2006)
    )
    (Identical-in-Substance
    )
    Rulemaking - Public Water Supply)
    SDWA UPDATE, USEPA AMENDMENTS
    )
    R07-11
    (July 1, 2006 though December 31, 2006)
    )
    (Identical-in-Substance
    )
    Rulemaking - Public Water Supply)
    )
    (Consolidated)
    Adopted Rule. Final Order.
    ORDER OF THE BOARD (by T.E. Johnson):
    The Board today adopts amendments to the Illinois regulations that are “identical in
    substance” to drinking water regulations adopted by the United States Environmental Protection
    Agency (USEPA). The USEPA rules implement Sections 1412(b), 1414(c), 1417(a), and
    1445(a) of the federal Safe Drinking Water Act (SDWA) (42 U.S.C. §§ 300g-1(a), 300g-3(c),
    300g-6(a), and 300j-4(a) (2002)).
    The R07-2 docket includes federal SDWA amendments that USEPA adopted in the
    periods January 1, 2006 though June 30, 2006, and the R07-11 docket includes federal SDWA
    amendments that USEPA adopted in the periods July 1, 2006 though December 31, 2006. The
    amendments incorporate into the Illinois regulations three related, significant new federal rules:
    the Stage 2 Disinfectants and Disinfection Byproducts Rule, the Long Term 2 Enhanced Surface
    Water Treatment Rule, and the Groundwater Rule.
    Sections 7.2 and 17.5 of the Environmental Protection Act (Act) (415 ILCS 5/7.2 and
    17.5 (2006)) provide for quick adoption by the Board of regulations that are identical in
    substance to federal regulations that USEPA adopts to implement Sections 1412(b), 1414(c),
    1417(a), and 1445(a) of the federal SDWA. Section 17.5 also provides that Title VII of the Act
    and Section 5 of the Administrative Procedure Act (APA) (5 ILCS 100/5-35 and 5-40 (2006)) do
    not apply to the Board’s adoption of identical-in-substance regulations. The federal SDWA
    regulations are found at 40 C.F.R. 141 through 143.
    This order is supported by an opinion that the Board also adopts today. The Board will
    file the adopted amendments with the Office of the Secretary of State as soon as possible, but no
    later than August 6, 2007, which is their present due date pursuant to the extensions of the
    deadline adopted by the Board on December 21, 2006 and April 19, 2007 pursuant to Section
    7.2(b) of the Act (415 ILCS 5/7.2(b) (2006)).
    See
    31 Ill. Reg. 7188 (May 11, 2007) (Notice of
    Public Information Pursuant to 415 ILCS 5/7.2(b)).
    2
    The Clerk is directed to cause the filing of the following adopted amendments with the
    Office of the Secretary of State for their publication in the
    Illinois Register
    :
    TITLE 35: ENVIRONMENTAL PROTECTION
    SUBTITLE F: PUBLIC WATER SUPPLIES
    CHAPTER I: POLLUTION CONTROL BOARD
    PART 611
    PRIMARY DRINKING WATER STANDARDS
    SUBPART A: GENERAL
    Section
    611.100
    Purpose, Scope, and Applicability
    611.101
    Definitions
    611.102
    Incorporations by Reference
    611.103
    Severability
    611.105
    Electronic Reporting
    611.107
    Agency Inspection of PWS Facilities
    611.108
    Delegation to Local Government
    611.109
    Enforcement
    611.110
    Special Exception Permits
    611.111
    Relief Equivalent to SDWA Section 1415(a) Variances
    611.112
    Relief Equivalent to SDWA Section 1416 Exemptions
    611.113
    Alternative Treatment Techniques
    611.114
    Siting Requirements
    611.115
    Source Water Quantity
    611.120
    Effective Dates
    611.121
    Maximum Contaminant Levels and Finished Water Quality
    611.125
    Fluoridation Requirement
    611.126
    Prohibition on Use of Lead
    611.130
    Special Requirements for Certain Variances and Adjusted Standards
    611.131
    Relief Equivalent to SDWA Section 1415(e) Small System Variance
    611.160
    Composite Correction Program
    611.161
    Case-by-Case Reduced Subpart Y Monitoring for Wholesale and Consecutive
    Systems
    SUBPART B: FILTRATION AND DISINFECTION
    Section
    611.201
    Requiring a Demonstration
    611.202
    Procedures for Agency Determinations
    611.211
    Filtration Required
    611.212
    Groundwater under Direct Influence of Surface Water
    611.213
    No Method of HPC Analysis
    611.220
    General Requirements
    611.230
    Filtration Effective Dates
    611.231
    Source Water Quality Conditions
    3
    611.232
    Site-Specific Conditions
    611.233
    Treatment Technique Violations
    611.240
    Disinfection
    611.241
    Unfiltered PWSs
    611.242
    Filtered PWSs
    611.250
    Filtration
    611.261
    Unfiltered PWSs: Reporting and Recordkeeping
    611.262
    Filtered PWSs: Reporting and Recordkeeping
    611.271
    Protection during Repair Work
    611.272
    Disinfection Following Repair
    611.276
    Recycle Provisions
    SUBPART C: USE OF NON-CENTRALIZED TREATMENT DEVICES
    Section
    611.280
    Point-of-Entry Devices
    611.290
    Use of Point-of-Use Devices or Bottled Water
    SUBPART D: TREATMENT TECHNIQUES
    Section
    611.295
    General Requirements
    611.296
    Acrylamide and Epichlorohydrin
    611.297
    Corrosion Control
    SUBPART F: MAXIMUM CONTAMINANT LEVELS (MCLs) AND
    MAXIMUM RESIDUAL DISINFECTANT LEVELS (MRDLs)
    Section
    611.300
    Old MCLs for Inorganic Chemical Contaminants
    611.301
    Revised MCLs for Inorganic Chemical Contaminants
    611.310
    Old State-Only Maximum Contaminant Levels (MCLs) for Organic Chemical
    Contaminants
    611.311
    Revised MCLs for Organic Chemical Contaminants
    611.312
    Maximum Contaminant Levels (MCLs) for Disinfection Byproducts (DBPs)
    611.313
    Maximum Residual Disinfectant Levels (MRDLs)
    611.320
    Turbidity (Repealed)
    611.325
    Microbiological Contaminants
    611.330
    Maximum Contaminant Levels for Radionuclides
    611.331
    Beta Particle and Photon Radioactivity (Repealed)
    SUBPART G: LEAD AND COPPER
    Section
    611.350
    General Requirements
    611.351
    Applicability of Corrosion Control
    611.352
    Corrosion Control Treatment
    611.353
    Source Water Treatment
    611.354
    Lead Service Line Replacement
    611.355
    Public Education and Supplemental Monitoring
    4
    611.356
    Tap Water Monitoring for Lead and Copper
    611.357
    Monitoring for Water Quality Parameters
    611.358
    Monitoring for Lead and Copper in Source Water
    611.359
    Analytical Methods
    611.360
    Reporting
    611.361
    Recordkeeping
    SUBPART I: DISINFECTANT RESIDUALS, DISINFECTION BYPRODUCTS,
    AND DISINFECTION BYPRODUCT PRECURSORS
    Section
    611.380
    General Requirements
    611.381
    Analytical Requirements
    611.382
    Monitoring Requirements
    611.383
    Compliance Requirements
    611.384
    Reporting and Recordkeeping Requirements
    611.385
    Treatment Technique for Control of Disinfection Byproduct (DBP) Precursors
    SUBPART K: GENERAL MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section
    611.480
    Alternative Analytical Techniques
    611.490
    Certified Laboratories
    611.491
    Laboratory Testing Equipment
    611.500
    Consecutive PWSs
    611.510
    Special Monitoring for Unregulated Contaminants (Repealed)
    SUBPART L: MICROBIOLOGICAL MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section
    611.521
    Routine Coliform Monitoring
    611.522
    Repeat Coliform Monitoring
    611.523
    Invalidation of Total Coliform Samples
    611.524
    Sanitary Surveys
    611.525
    Fecal Coliform and E. Coli Testing
    611.526
    Analytical Methodology
    611.527
    Response to Violation
    611.531
    Analytical Requirements
    611.532
    Unfiltered PWSs
    611.533
    Filtered PWSs
    SUBPART M: TURBIDITY MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section
    611.560
    Turbidity
    5
    SUBPART N: INORGANIC MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section
    611.591
    Violation of a State MCL
    611.592
    Frequency of State Monitoring
    611.600
    Applicability
    611.601
    Monitoring Frequency
    611.602
    Asbestos Monitoring Frequency
    611.603
    Inorganic Monitoring Frequency
    611.604
    Nitrate Monitoring
    611.605
    Nitrite Monitoring
    611.606
    Confirmation Samples
    611.607
    More Frequent Monitoring and Confirmation Sampling
    611.608
    Additional Optional Monitoring
    611.609
    Determining Compliance
    611.610
    Inorganic Monitoring Times
    611.611
    Inorganic Analysis
    611.612
    Monitoring Requirements for Old Inorganic MCLs
    611.630
    Special Monitoring for Sodium
    611.631
    Special Monitoring for Inorganic Chemicals (Repealed)
    SUBPART O: ORGANIC MONITORING AND ANALYTICAL REQUIREMENTS
    Section
    611.640
    Definitions
    611.641
    Old MCLs
    611.645
    Analytical Methods for Organic Chemical Contaminants
    611.646
    Phase I, Phase II, and Phase V Volatile Organic Contaminants
    611.647
    Sampling for Phase I Volatile Organic Contaminants (Repealed)
    611.648
    Phase II, Phase IIB, and Phase V Synthetic Organic Contaminants
    611.650
    Monitoring for 36 Contaminants (Repealed)
    611.657
    Analytical Methods for 36 Contaminants (Repealed)
    611.658
    Special Monitoring for Organic Chemicals (Repealed)
    SUBPART P: THM MONITORING AND ANALYTICAL REQUIREMENTS
    Section
    611.680
    Sampling, Analytical, and other Requirements
    611.683
    Reduced Monitoring Frequency (Repealed)
    611.684
    Averaging (Repealed)
    611.685
    Analytical Methods
    611.686
    Modification to System (Repealed)
    611.687
    Sampling for THM Potential (Repealed)
    611.688
    Applicability Dates (Repealed)
    6
    SUBPART Q: RADIOLOGICAL MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section
    611.720
    Analytical Methods
    611.731
    Gross Alpha
    611.732
    Beta Particle and Photon Radioactivity
    611.733
    General Monitoring and Compliance Requirements
    SUBPART R: ENHANCED FILTRATION AND DISINFECTION: SYSTEMS
    THAT SERVE 10,000 OR MORE PEOPLE
    Section
    611.740
    General Requirements
    611.741
    Standards for Avoiding Filtration
    611.742
    Disinfection Profiling and Benchmarking
    611.743
    Filtration
    611.744
    Filtration Sampling Requirements
    611.745
    Reporting and Recordkeeping Requirements
    SUBPART S: GROUNDWATER RULE
    Section
    611.800
    General Requirements and Applicability
    611.801
    Sanitary Surveys for GWS Suppliers
    611.802
    Groundwater Source Microbial Monitoring and Analytical Methods
    611.803
    Treatment Technique Requirements for GWS Suppliers
    611.804
    Treatment Technique Violations for GWS Suppliers
    611.805
    Reporting and Recordkeeping for GWS Suppliers
    SUBPART T: REPORTING AND RECORDKEEPING
    Section
    611.830
    Applicability
    611.831
    Monthly Operating Report
    611.832
    Notice by Agency (Repealed)
    611.833
    Cross Connection Reporting
    611.840
    Reporting
    611.851
    Reporting MCL, MRDL, and other Violations (Repealed)
    611.852
    Reporting other Violations (Repealed)
    611.853
    Notice to New Billing Units (Repealed)
    611.854
    General Content of Public Notice (Repealed)
    611.855
    Mandatory Health Effects Language (Repealed)
    611.856
    Fluoride Notice (Repealed)
    611.858
    Fluoride Secondary Standard (Repealed)
    611.860
    Record Maintenance
    611.870
    List of 36 Contaminants (Repealed)
    7
    SUBPART U: CONSUMER CONFIDENCE REPORTS
    Section
    611.881
    Purpose and Applicability
    611.882
    Compliance Dates
    611.883
    Content of the Reports
    611.884
    Required Additional Health Information
    611.885
    Report Delivery and Recordkeeping
    SUBPART V: PUBLIC NOTIFICATION OF DRINKING WATER
    VIOLATIONS
    Section
    611.901
    General Public Notification Requirements
    611.902
    Tier 1 Public Notice: Form, Manner, and Frequency of Notice
    611.903
    Tier 2 Public Notice: Form, Manner, and Frequency of Notice
    611.904
    Tier 3 Public Notice: Form, Manner, and Frequency of Notice
    611.905
    Content of the Public Notice
    611.906
    Notice to New Billing Units or New Customers
    611.907
    Special Notice of the Availability of Unregulated Contaminant Monitoring
    Results
    611.908
    Special Notice for Exceedence of the Fluoride Secondary Standard
    611.909
    Special Notice for Nitrate Exceedences above the MCL by a Non-Community
    Water System
    611.910
    Notice by the Agency on Behalf of a PWS
    611.911
    Special Notice for Cryptosporidium
    SUBPART W: INITIAL DISTRIBUTION SYSTEM EVALUATIONS
    Section
    611.920
    General Requirements
    611.921
    Standard Monitoring
    611.922
    System-Specific Studies
    611.923
    40/30 Certification
    611.924
    Very Small System Waivers
    611.925
    Subpart Y Compliance Monitoring Location Recommendations
    SUBPART X: ENHANCED FILTRATION AND DISINFECTION—SYSTEMS
    SERVING FEWER THAN 10,000 PEOPLE
    Section
    611.950
    General Requirements
    611.951
    Finished Water Reservoirs
    611.952
    Additional Watershed Control Requirements for Unfiltered Systems
    611.953
    Disinfection Profile
    611.954
    Disinfection Benchmark
    611.955
    Combined Filter Effluent Turbidity Limits
    611.956
    Individual Filter Turbidity Requirements
    611.957
    Reporting and Recordkeeping Requirements
    8
    SUBPART Y—STAGE 2 DISINFECTION BYPRODUCTS REQUIREMENTS
    Section
    611.970
    General Requirements
    611.971
    Routine Monitoring
    611.972
    Subpart Y Monitoring Plan
    611.973
    Reduced Monitoring
    611.974
    Additional Requirements for Consecutive Systems
    611.975
    Conditions Requiring Increased Monitoring
    611.976
    Operational Evaluation Levels
    611.977
    Requirements for Remaining on Reduced TTHM and HAA5 Monitoring Based
    on Subpart I Results
    611.978
    Requirements for Remaining on Increased TTHM and HAA5 Monitoring Based
    on Subpart I Results
    611.979
    Reporting and Recordkeeping Requirements
    SUBPART Z: ENHANCED TREATMENT FOR CRYPTOSPORIDIUM
    Section
    611.1000
    General Requirements
    611.1001
    Source Water Monitoring Requirements: Source Water Monitoring
    611.1002
    Source Water Monitoring Requirements: Sampling Schedules
    611.1003
    Source Water Monitoring Requirements: Sampling Locations
    611.1004
    Source Water Monitoring Requirements: Analytical Methods
    611.1005
    Source Water Monitoring Requirements: Approved Laboratories
    611.1006
    Source Water Monitoring Requirements: Reporting Source Water Monitoring
    Results
    611.1007
    Source Water Monitoring Requirements: Grandfathering Previously Collected
    Data
    611.1008
    Disinfection Profiling and Benchmarking Requirements: Requirements When
    Making a Significant Change in Disinfection Practice
    611.1009
    Disinfection Profiling and Benchmarking Requirements: Developing the
    Disinfection Profile and Benchmark
    611.1010
    Treatment Technique Requirements: Bin Classification for Filtered Systems
    611.1011
    Treatment Technique Requirements: Filtered System Additional
    Cryptosporidium Treatment Requirements
    611.1012
    Treatment Technique Requirements: Unfiltered System Cryptosporidium
    Treatment Requirements
    611.1013
    Treatment Technique Requirements: Schedule for Compliance with
    Cryptosporidium Treatment Requirements
    611.1014
    Treatment Technique Requirements: Requirements for Uncovered Finished
    Water Storage Facilities
    611.1015
    Requirements for Microbial Toolbox Components: Microbial Toolbox Options
    for Meeting Cryptosporidium Treatment Requirements
    611.1016
    Requirements for Microbial Toolbox Components: Source Toolbox Components
    611.1017
    Requirements for Microbial Toolbox Components: Pre-Filtration Treatment
    Toolbox Components
    611.1018
    Requirements for Microbial Toolbox Components: Treatment Performance
    9
    Toolbox Components
    611.1019
    Requirements for Microbial Toolbox Components: Additional Filtration Toolbox
    Components
    611.1020
    Requirements for Microbial Toolbox Components: Inactivation Toolbox
    Components
    611.1021
    Reporting and Recordkeeping Requirements: Reporting Requirements
    611.1022
    Reporting and Recordkeeping Requirements: Recordkeeping Requirements
    611.1023
    Requirements to Respond to Significant Deficiencies Identified in Sanitary
    Surveys Performed by USEPA or the Agency
    611.Appendix A
    Regulated Contaminants
    611.Appendix B
    Percent Inactivation of G. Lamblia Cysts
    611.Appendix C
    Common Names of Organic Chemicals
    611.Appendix D
    Defined Substrate Method for the Simultaneous Detection of Total Coliforms
    and Eschericia Coli from Drinking Water
    611.Appendix E
    Mandatory Lead Public Education Information for Community Water
    Systems
    611.Appendix F
    Mandatory Lead Public Education Information for Non-Transient Non-
    Community Water Systems
    611.Appendix G
    NPDWR Violations and Situations Requiring Public Notice
    611.Appendix H
    Standard Health Effects Language for Public Notification
    611.Appendix I
    Acronyms Used in Public Notification Regulation
    611.Table A
    Total Coliform Monitoring Frequency
    611.Table B
    Fecal or Total Coliform Density Measurements
    611.Table C
    Frequency of RDC Measurement
    611.Table D
    Number of Lead and Copper Monitoring Sites
    611.Table E
    Lead and Copper Monitoring Start Dates
    611.Table F
    Number of Water Quality Parameter Sampling Sites
    611.Table G
    Summary of Section 611.357 Monitoring Requirements for Water Quality
    Parameters
    611.Table H
    CT Values (mg.min/ℓ) for Cryptosporidium Inactivation by Chlorine
    Dioxide
    611.Table I
    CT Values (mg.min/ℓ) for Cryptosporidium Inactivation by Ozone
    611.Table J
    UV Dose Table for Cryptosporidium, Giardia lamblia, and Virus
    Inactivation Credit
    611.Table Z
    Federal Effective Dates
    AUTHORITY: Implementing Sections 7.2, 17, and 17.5 and authorized by Section 27 of the
    Environmental Protection Act [415 ILCS 5/7.2, 17, 17.5, and 27].
    SOURCE: Adopted in R88-26 at 14 Ill. Reg. 16517, effective September 20, 1990; amended in
    R90-21 at 14 Ill. Reg. 20448, effective December 11, 1990; amended in R90-13 at 15 Ill. Reg. 1562,
    effective January 22, 1991; amended in R91-3 at 16 Ill. Reg. 19010, effective December 1, 1992;
    amended in R92-3 at 17 Ill. Reg. 7796, effective May 18, 1993; amended in R93-1 at 17 Ill. Reg.
    12650, effective July 23, 1993; amended in R94-4 at 18 Ill. Reg. 12291, effective July 28, 1994;
    amended in R94-23 at 19 Ill. Reg. 8613, effective June 20, 1995; amended in R95-17 at 20 Ill. Reg.
    10
    14493, effective October 22, 1996; amended in R98-2 at 22 Ill. Reg. 5020, effective March 5,
    1998; amended in R99-6 at 23 Ill. Reg. 2756, effective February 17, 1999; amended in R99-12 at 23
    Ill. Reg. 10348, effective August 11, 1999; amended in R00-8 at 23 Ill. Reg. 14715, effective
    December 8, 1999; amended in R00-10 at 24 Ill. Reg. 14226, effective September 11, 2000;
    amended in R01-7 at 25 Ill. Reg. 1329, effective January 11, 2001; amended in R01-20 at 25 Ill.
    Reg. 13611, effective October 9, 2001; amended in R02-5 at 26 Ill. Reg. 3522, effective
    February 22, 2002; amended in R03-4 at 27 Ill. Reg. 1183, effective January 10, 2003; amended
    in R03-15 at 27 Ill. Reg. 16447, effective October 10, 2003; amended in R04-3 at 28 Ill. Reg.
    5269, effective March 10, 2004; amended in R04-13 at 28 Ill. Reg. 12666, effective August 26,
    2004; amended in R05-6 at 29 Ill. Reg. 2287, effective January 28, 2005; amended in R06-15 at
    30 Ill. Reg. 17004, effective October 13, 2006; amended in R07-2/R07-11 at 31 Ill. Reg.
    ________, effective ______________________.
    SUBPART A: GENERAL
    Section 611.101
    Definitions
    As used in this Part, the following terms have the given meanings:
    “Act” means the Environmental Protection Act [415 ILCS 5].
    “Agency” means the Illinois Environmental Protection Agency.
    BOARD NOTE: The Department of Public Health (Public Health or DPH)
    regulates non-community water supplies (“non-CWSs,” including non-transient,
    non-community water supplies (“NTNCWSs”) and transient non-community water
    supplies (“transient non-CWSs”)). For the purposes of regulation of supplies by
    Public Health by reference to this Part, “Agency” will mean the Department of
    Public Health.
    “Ai” means “inactivation ratio.”
    “Approved source of bottled water,” for the purposes of Section 611.130(d)(4),
    means a source of water and the water therefrom, whether it be from a spring,
    artesian well, drilled well, municipal water supply, or any other source, that has been
    inspected and the water sampled, analyzed, and found to be a safe and sanitary
    quality according to applicable laws and regulations of State and local government
    agencies having jurisdiction, as evidenced by the presence in the plant of current
    certificates or notations of approval from each government agency or agencies
    having jurisdiction over the source, the water it bottles, and the distribution of the
    water in commerce.
    BOARD NOTE: Derived from 40 CFR 142.62(g)(2) and 21 CFR 129.3(a) (2003)
    (2006)
    . The Board cannot compile an exhaustive listing of all federal, State, and
    local laws to which bottled water and bottling water may be subjected. However, the
    statutes and regulations of which the Board is aware are the following: the Illinois
    Food, Drug and Cosmetic Act [410 ILCS 620], the Bottled Water Act [815 ILCS
    310], the DPH Water Well Construction Code (77 Ill. Adm. Code 920), the DPH
    11
    Water Well Pump Installation Code (77 Ill. Adm. Code 925), the federal bottled
    water quality standards (21 CFR 103.35), the federal drinking water processing and
    bottling standards (21 CFR 129), the federal Current Good Manufacturing Practice in
    Manufacturing, Packing, or Holding Human Food (21 CFR 110), the federal Fair
    Packaging and Labeling Act (15 USC 1451 et seq.), and the federal Fair Packaging
    and Labeling regulations (21 CFR 201).
    “Bag filters” means pressure-driven separation devices that remove particulate
    matter larger than one micrometer using an engineered porous filtration media.
    They are typically constructed of a non-rigid, fabric filtration media housed in a
    pressure vessel in which the direction of flow is from the inside of the bag to
    outside.
    “Bank filtration” means a water treatment process that uses a well to recover
    surface water that has naturally infiltrated into groundwater through a river bed or
    banks. Infiltration is typically enhanced by the hydraulic gradient imposed by a
    nearby pumping water supply or other wells.
    “Best available technology” or “BAT” means the best technology, treatment
    techniques, or other means that USEPA has found are available for the contaminant
    in question. BAT is specified in Subpart F of this Part.
    “Bin classification” or “bin” means, for the purposes of Subpart Z of this Part, the
    appropriate of the four treatment categories (Bin 1, Bin 2, Bin 3, or Bin 4) that is
    assigned to a filtered system supplier pursuant to Section 611.1010 based on the
    results of the source water Cryptosporidium monitoring described in the previous
    section. This bin classification determines the degree of additional
    Cryptosporidium treatment, if any, the filtered PWS must provide.
    BOARD NOTE: Derived from 40 CFR 141.710 and the preamble discussion at
    71 Fed. Reg. 654, 657 (Jan. 5, 2006).
    “Board” means the Illinois Pollution Control Board.
    “Cartridge filters” means pressure-driven separation devices that remove
    particulate matter larger than 1 micrometer using an engineered porous filtration
    media. They are typically constructed as rigid or semi-rigid, self-supporting filter
    elements housed in pressure vessels in which flow is from the outside of the
    cartridge to the inside.
    “CAS No.” means “Chemical Abstracts Services Number.”
    “CT” or “CT
    calc
    ” is the product of “residual disinfectant concentration” (RDC or C)
    in mg/ℓ determined before or at the first customer, and the corresponding
    “disinfectant contact time” (T) in minutes. If a supplier applies disinfectants at more
    than one point prior to the first customer, it must determine the CT of each
    disinfectant sequence before or at the first customer to determine the total percent
    12
    inactivation or “total inactivation ratio.” In determining the total inactivation ratio,
    the supplier must determine the RDC of each disinfection sequence and
    corresponding contact time before any subsequent disinfection application points.
    (See “CT
    99.9
    .”)
    “CT
    99.9
    ” is the CT value required for 99.9 percent (3-log) inactivation of Giardia
    lamblia cysts. CT
    99.9
    for a variety of disinfectants and conditions appear in Tables
    1.1-1.6, 2.1 and 3.1 of Appendix B of this Part. (See “Inactivation Ratio.”)
    BOARD NOTE: Derived from the definition of “CT” in 40 CFR 141.2 (2003)
    (2006).
    “Coagulation” means a process using coagulant chemicals and mixing by which
    colloidal and suspended materials are destabilized and agglomerated into flocs.
    “Combined distribution system” means the interconnected distribution system
    consisting of the distribution systems of wholesale systems and of the consecutive
    systems that receive finished water.
    “Community water system” or “CWS” means a public water system (PWS) that
    serves at least 15 service connections used by year-round residents or regularly
    serves at least 25 year-round residents.
    BOARD NOTE: This definition differs slightly from that of Section 3.05 of the Act.
    “Compliance cycle” means the nine-year calendar year cycle during which public
    water systems (PWSs) must monitor. Each compliance cycle consists of three three-
    year compliance periods. The first calendar cycle began January 1, 1993, and ended
    December 31, 2001; the second began January 1, 2002, and ends December 31,
    2010; the third begins January 1, 2011, and ends December 31, 2019.
    “Compliance period” means a three-year calendar year period within a compliance
    cycle. Each compliance cycle has three three-year compliance periods. Within the
    first compliance cycle, the first compliance period ran from January 1, 1993 to
    December 31, 1995; the second from January 1, 1996 to December 31, 1998; the
    third from January 1, 1999 to December 31, 2001.
    “Comprehensive performance evaluation” or “CPE” is a thorough review and
    analysis of a treatment plant’s performance-based capabilities and associated
    administrative, operation, and maintenance practices. It is conducted to identify
    factors that may be adversely impacting a plant’s capability to achieve
    compliance and emphasizes approaches that can be implemented without
    significant capital improvements.
    BOARD NOTE: The final sentence of the definition of “comprehensive
    performance evaluation” in 40 CFR 141.2 is codified as Section 611.160(a)(2),
    since it contains substantive elements that are more appropriately codified in a
    substantive provision.
    13
    “Confluent growth” means a continuous bacterial growth covering the entire
    filtration area of a membrane filter or a portion thereof, in which bacterial colonies
    are not discrete.
    “Consecutive system” means a public water system that receives some or all of its
    finished water from one or more wholesale systems. Delivery may be through a
    direct connection or through the distribution system of one or more consecutive
    systems.
    “Contaminant” means any physical, chemical, biological, or radiological substance
    or matter in water.
    “Conventional filtration treatment” means a series of processes including
    coagulation, flocculation, sedimentation, and filtration resulting in substantial
    particulate removal.
    “Diatomaceous earth filtration” means a process resulting in substantial particulate
    removal in which the following occur:
    A precoat cake of diatomaceous earth filter media is deposited on a support
    membrane (septum); and
    While the water is filtered by passing through the cake on the septum,
    additional filter media known as body feed is continuously added to the feed
    water to maintain the permeability of the filter cake.
    “Direct filtration” means a series of processes including coagulation and filtration but
    excluding sedimentation resulting in substantial particulate removal.
    “Disinfectant” means any oxidant, including but not limited to chlorine, chlorine
    dioxide, chloramines, and ozone added to water in any part of the treatment or
    distribution process, that is intended to kill or inactivate pathogenic microorganisms.
    “Disinfectant contact time” or “T” means the time in minutes that it takes for water
    to move from the point of disinfectant application or the previous point of RDC
    measurement to a point before or at the point where RDC is measured.
    Where only one RDC is measured, T is the time in minutes that it takes for
    water to move from the point of disinfectant application to a point before or
    at the point where RDC is measured.
    Where more than one RDC is measured, T is as follows:
    For the first measurement of RDC, the time in minutes that it takes
    for water to move from the first or only point of disinfectant
    application to a point before or at the point where the first RDC is
    14
    measured; and
    For subsequent measurements of RDC, the time in minutes that it
    takes for water to move from the previous RDC measurement point
    to the RDC measurement point for which the particular T is being
    calculated.
    T in pipelines must be calculated based on “plug flow” by dividing the
    internal volume of the pipe by the maximum hourly flow rate through that
    pipe.
    T within mixing basins and storage reservoirs must be determined by tracer
    studies or an equivalent demonstration.
    “Disinfection” means a process that inactivates pathogenic organisms in water by
    chemical oxidants or equivalent agents.
    “Disinfection byproduct” or “DBP” means a chemical byproduct that forms when
    disinfectants used for microbial control react with naturally occurring compounds
    already present in source water. DBPs include, but are not limited to,
    bromodichloromethane, bromoform, chloroform, dichloroacetic acid, bromate,
    chlorite, dibromochloromethane, and certain haloacetic acids.
    “Disinfection profile” is a summary of daily Giardia lamblia inactivation through
    the treatment plant. The procedure for developing a disinfection profile is
    contained in Section 611.742.
    “Distribution system” includes all points downstream of an “entry point” to the point
    of consumer ownership.
    “Domestic or other non-distribution system plumbing problem” means a coliform
    contamination problem in a PWS with more than one service connection that is
    limited to the specific service connection from which the coliform-positive sample
    was taken.
    “Dose equivalent” means the product of the absorbed dose from ionizing radiation
    and such factors as account for differences in biological effectiveness due to the type
    of radiation and its distribution in the body as specified by the International
    Commission on Radiological Units and Measurements (ICRU).
    “Dual sample set” means a set of two samples collected at the same time and
    same location, with one sample analyzed for TTHM and the other sample
    analyzed for HAA5. Dual sample sets are collected for the purposes of conducting
    an IDSE under Subpart W of this Part and determining compliance with the
    TTHM and HAA5 MCLs under Subpart Y of this Part.
    15
    “Enhanced coagulation” means the addition of sufficient coagulant for improved
    removal of disinfection byproduct (DBP) precursors by conventional filtration
    treatment.
    “Enhanced softening” means the improved removal of disinfection byproduct
    (DBP) precursors by precipitative softening.
    “Entry point” means a point just downstream of the final treatment operation, but
    upstream of the first user and upstream of any mixing with other water. If raw water
    is used without treatment, the “entry point” is the raw water source. If a PWS
    receives treated water from another PWS, the “entry point” is a point just
    downstream of the other PWS, but upstream of the first user on the receiving PWS,
    and upstream of any mixing with other water.
    “Filter profile” is a graphical representation of individual filter performance,
    based on continuous turbidity measurements or total particle counts versus time
    for an entire filter run, from startup to backwash inclusively, that includes an
    assessment of filter performance while another filter is being backwashed.
    “Filtration” means a process for removing particulate matter from water by passage
    through porous media.
    “Finished water” means water that is introduced into the distribution system of a
    public water system which is intended for distribution and consumption without
    further treatment, except that treatment which is necessary to maintain water
    quality in the distribution system (e.g., booster disinfection, addition of corrosion
    control chemicals, etc.).
    “Flocculation” means a process to enhance agglomeration or collection of smaller
    floc particles into larger, more easily settleable particles through gentle stirring by
    hydraulic or mechanical means.
    “Flowing stream” means a course of running water flowing in a definite channel.
    “40/30 certification” means the certification, submitted by the supplier to the
    Agency pursuant to Section 611.923, that the supplier had no TTHM or HAA5
    monitoring violations, and that no individual sample from its system exceeded
    0.040 mg/ℓ TTHM or 0.030 mg/ℓ HAA5 during eight consecutive calendar
    quarters.
    BOARD NOTE: Derived from 40 CFR 141.603(a) (2006).
    “GAC10” means granular activated carbon (GAC) filter beds with an empty-bed
    contact time of 10 minutes based on average daily flow and a carbon reactivation
    frequency of every 180 days, except that the reactivation frequency for GAC10
    that is used as a best available technology for compliance with the MCLs set forth
    in Subpart Y of this Part pursuant to Section 611.312(b)(2) is 120 days.
    16
    “GAC20” means granular activated carbon filter beds with an empty-bed contact
    time of 20 minutes based on average daily flow and a carbon reactivation
    frequency of every 240 days.
    “GC” means “gas chromatography” or “gas-liquid phase chromatography.”
    “GC/MS” means gas chromatography (GC) followed by mass spectrometry (MS).
    “Gross alpha particle activity” means the total radioactivity due to alpha particle
    emission as inferred from measurements on a dry sample.
    “Gross beta particle activity” means the total radioactivity due to beta particle
    emission as inferred from measurements on a dry sample.
    “Groundwater system” or “GWS” means a public water supply (PWS) that uses
    only groundwater sources, including a consecutive system that receives finished
    groundwater.
    BOARD NOTE: Derived from 40 CFR 141.23(b)(2) and 141.24(f)(2) note
    (2006) and 40 CFR 141.400(b), as added at 71 Fed. Reg. 65576 (Nov. 8, 2006).
    “Groundwater under the direct influence of surface water” means any water beneath
    the surface of the ground with significant occurrence of insects or other
    macroorganisms, algae, or large-diameter pathogens, such as Giardia lamblia or
    Cryptosporidium, or significant and relatively rapid shifts in water characteristics,
    such as turbidity, temperature, conductivity, or pH, that closely correlate to
    climatological or surface water conditions. “Groundwater under the direct
    influence of surface water” is as determined in Section 611.212.
    “GWS” means “groundwater system,” a public water supply (PWS) that uses only
    groundwater sources.
    BOARD NOTE: Drawn from 40 CFR 141.23(b)(2) & 141.24(f)(2) note (2003).
    “Haloacetic acids (five)” or “HAA5” means the sum of the concentrations in
    milligrams per liter (mg/ℓ) of five haloacetic acid compounds (monochloroacetic
    acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, and
    dibromoacetic acid), rounded to two significant figures after addition.
    “Halogen” means one of the chemical elements chlorine, bromine, or iodine.
    “HPC” means “heterotrophic plate count,” measured as specified in Section
    611.531(c).
    “Hydrogeologic sensitivity assessment,” for the purposes of Subpart S of this
    Part, means a determination of whether a GWS supplier obtains water from a
    hydrogeologically sensitive setting.
    17
    BOARD NOTE: Derived from 40 CFR 141.400(c)(5), as added at 71 Fed. Reg.
    65574 (Nov. 8, 2006).
    “Inactivation ratio” or “(Ai)” means as follows:
    Ai = CT
    calc
    /CT
    99.9
    The sum of the inactivation ratios, or “total inactivation ratio” (B) is
    calculated by adding together the inactivation ratio for each disinfection
    sequence as follows:
    B =
    ∑(Ai)
    A total inactivation ratio equal to or greater than 1.0 is assumed to provide a
    3-log inactivation of Giardia lamblia cysts.
    BOARD NOTE: Derived from the definition of “CT” in 40 CFR 141.2 (2003)
    (2006)
    .
    “Initial compliance period” means the three-year compliance period that begins
    January 1, 1993, except for the MCLs for dichloromethane, 1,2,4-trichlorobenzene,
    1,1,2-trichloroethane, benzo(a)pyrene, dalapon, di(2-ethylhexyl)adipate, di(2-ethyl-
    hexyl)phthalate, dinoseb, diquat, endothall, endrin, glyphosate, hexachlorobenzene,
    hexachlorocyclopentadiene, oxamyl, picloram, simazine, 2,3,7,8-TCDD, antimony,
    beryllium, cyanide, nickel, and thallium, as they apply to a supplier whose system
    has fewer than 150 service connections, for which it means the three-year
    compliance period that began on January 1, 1996.
    “Initial distribution system evaluation” or “IDSE” means the evaluation,
    performed by the supplier pursuant to Section 611.921(c), to determine the
    locations in a distribution system that are representative of high TTHM and
    HAA5 concentrations throughout the distribution system. An IDSE is used in
    conjunction with, but is distinct from, the compliance monitoring undertaken to
    identify and select monitoring locations used to determine compliance with
    Subpart X.
    BOARD NOTE: Derived from 40 CFR 611.601(c) (2006).
    “Inorganic contaminants” or “IOCs” refers to that group of contaminants
    designated as such in United States Environmental Protection Agency (USEPA)
    regulatory discussions and guidance documents. IOCs include antimony, arsenic,
    asbestos, barium, beryllium, cadmium, chromium, cyanide, mercury, nickel,
    nitrate, nitrite, selenium, and thallium.
    BOARD NOTE: The IOCs are derived from 40 CFR 141.23(a)(4) (2003)
    (2006).
    “ℓ” means “liter.”
    “Lake or reservoir” means a natural or man made basin or hollow on the Earth’s
    18
    surface in which water collects or is stored that may or may not have a current or
    single direction of flow.
    “Legionella” means a genus of bacteria, some species of which have caused a type of
    pneumonia called Legionnaires Disease.
    “Locational running annual average” or “LRAA” means the average of sample
    analytical results for samples taken at a particular monitoring location during the
    previous four calendar quarters.
    “Man-made beta particle and photon emitters” means all radionuclides emitting beta
    particles or photons listed in “Maximum Permissible Body Burdens and Maximum
    Permissible Concentrations of Radionuclides in Air and in Water for Occupational
    Exposure,” NCRP Report Number 22, incorporated by reference in Section 611.102,
    except the daughter products of thorium-232, uranium-235 and uranium-238.
    “Maximum contaminant level” or “MCL” means the maximum permissible level of
    a contaminant in water that is delivered to any user of a public water system. (See
    Section 611.121.)
    “Maximum contaminant level goal” or “MCLG” means the maximum level of a
    contaminant in drinking water at which no known or anticipated adverse effect on
    the health of persons would occur, and which allows an adequate margin of
    safety. MCLGs are nonenforceable health goals.
    BOARD NOTE: The Board has not routinely adopted the regulations relating to
    the federal MCLGs because they are outside the scope of the Board’s identical-in-
    substance mandate under Section 17.5 of the Act [415 ILCS 5/17.5].
    “Maximum residual disinfectant level” or “MRDL” means the maximum
    permissible level of a disinfectant added for water treatment that may not be
    exceeded at the consumer’s tap without an unacceptable possibility of adverse
    health effects. MRDLs are enforceable in the same manner as are MCLs. (See
    Section 611.313 and Section 611.383.)
    “Maximum residual disinfectant level goal” or “MRDLG” means the maximum
    level of a disinfectant added for water treatment at which no known or anticipated
    adverse effect on the health of persons would occur, and which allows an
    adequate margin of safety. MRDLGs are nonenforceable health goals and do not
    reflect the benefit of the addition of the chemical for control of waterborne
    microbial contaminants.
    “Maximum total trihalomethane potential” or “MTP” means the maximum
    concentration of total trihalomethanes (TTHMs) produced in a given water
    containing a disinfectant residual after seven days at a temperature of 25° C or above.
    “Membrane filtration” means a pressure or vacuum driven separation process in
    19
    which particulate matter larger than one micrometer is rejected by an engineered
    barrier, primarily through a size exclusion mechanism, and which has a
    measurable removal efficiency of a target organism that can be verified through
    the application of a direct integrity test. This definition includes the common
    membrane technologies of microfiltration, ultrafiltration, nanofiltration, and
    reverse osmosis.
    “MFL” means millions of fibers per liter larger than 10 micrometers.
    BOARD NOTE: Derived from 40 CFR 141.23(a)(4)(i) (2003) (2006).
    “mg” means milligrams (1/1000 of a gram).
    “mg/ℓ” means milligrams per liter.
    “Mixed system” means a PWS that uses both groundwater and surface water
    sources.
    BOARD NOTE: Drawn from 40 CFR 141.23(b)(2) and 141.24(f)(2) note (2003)
    (2006).
    “MUG” means 4-methyl-umbelliferyl-beta-d-glucuronide.
    “Near the first service connection” means at one of the 20 percent of all service
    connections in the entire system that are nearest the public water system (PWS)
    treatment facility, as measured by water transport time within the distribution system.
    “nm” means nanometer (1/1,000,000,000 of a meter).
    “Non-community water system” or “NCWS” or “non-CWS” means a public water
    system (PWS) that is not a community water system (CWS). A non-community
    water system is either a “transient non-community water system (TWS)” or a
    “non-transient non-community water system (NTNCWS).”
    “Non-transient non-community water system” or “NTNCWS” means a public water
    system (PWS) that is not a community water system (CWS) and that regularly serves
    at least 25 of the same persons over six months per year.
    “NPDWR” means “national primary drinking water regulation.”
    “NTU” means “nephelometric turbidity units.”
    “Old MCL” means one of the inorganic maximum contaminant levels (MCLs),
    codified at Section 611.300, or organic MCLs, codified at Section 611.310,
    including any marked as “additional State requirements.”
    BOARD NOTE: Old MCLs are those derived prior to the implementation of the
    USEPA “Phase II” regulations. The Section 611.640 definition of this term, which
    applies only to Subpart O of this Part, differs from this definition in that the
    20
    definition does not include the Section 611.300 inorganic MCLs.
    “P-A Coliform Test” means “Presence-Absence Coliform Test.”
    “Paired sample” means two samples of water for Total Organic Carbon (TOC).
    One sample is of raw water taken prior to any treatment. The other sample is taken
    after the point of combined filter effluent and is representative of the treated water.
    These samples are taken at the same time. (See Section 611.382.)
    “Performance evaluation sample” or “PE sample” means a reference sample
    provided to a laboratory for the purpose of demonstrating that the laboratory can
    successfully analyze the sample within limits of performance specified by the
    Agency; or, for bacteriological laboratories, Public Health; or, for radiological
    laboratories, the Illinois Department of Nuclear Safety. The true value of the
    concentration of the reference material is unknown to the laboratory at the time of
    the analysis.
    “Person” means an individual, corporation, company, association, partnership, state,
    unit of local government, or federal agency.
    “Phase I” refers to that group of chemical contaminants and the accompanying
    regulations promulgated by USEPA on July 8, 1987, at 52 Fed. Reg. 25712.
    “Phase II” refers to that group of chemical contaminants and the accompanying
    regulations promulgated by USEPA on January 30, 1991, at 56 Fed. Reg. 3578.
    “Phase IIB” refers to that group of chemical contaminants and the accompanying
    regulations promulgated by USEPA on July 1, 1991, at 56 Fed. Reg. 30266.
    “Phase V” refers to that group of chemical contaminants promulgated by USEPA on
    July 17, 1992, at 57 Fed. Reg. 31776.
    “Picocurie” or “pCi” means the quantity of radioactive material producing 2.22
    nuclear transformations per minute.
    “Plant intake” means the works or structures at the head of a conduit through
    which water is diverted from a source (e.g., a river or lake) into the treatment
    plant.
    “Point of disinfectant application” is the point at which the disinfectant is applied and
    downstream of which water is not subject to recontamination by surface water
    runoff.
    “Point-of-entry treatment device” or “POE” is a treatment device applied to the
    drinking water entering a house or building for the purpose of reducing contaminants
    in the drinking water distributed throughout the house or building.
    21
    “Point-of-use treatment device” or “POU” is a treatment device applied to a single
    tap used for the purpose of reducing contaminants in drinking water at that one tap.
    “Presedimentation” means a preliminary treatment process used to remove gravel,
    sand, and other particulate material from the source water through settling before
    the water enters the primary clarification and filtration processes in a treatment
    plant.
    “Public Health” or “DPH” means the Illinois Department of Public Health.
    BOARD NOTE: The Department of Public Health (“Public Health”) regulates non-
    community water supplies (“non-CWSs,” including non-transient, non-community
    water supplies (“NTNCWSs”) and transient non-community water supplies
    (“transient non-CWSs”)). For the purposes of regulation of supplies by Public
    Health by reference to this Part, “Agency” must mean Public Health.
    “Public water system” or “PWS” means a system for the provision to the public of
    water for human consumption through pipes or other constructed conveyances, if
    such system has at least 15 service connections or regularly serves an average of at
    least 25 individuals daily at least 60 days out of the year. A PWS is either a
    community water system (CWS) or a non-community water system (non-CWS). A
    PWS does not include any facility defined as “special irrigation district.” Such
    term includes the following:
    Any collection, treatment, storage, and distribution facilities under control of
    the operator of such system and used primarily in connection with such
    system; and
    Any collection or pretreatment storage facilities not under such control that
    are used primarily in connection with such system.
    BOARD NOTE: Where used in Subpart F of this Part, “public water supply” means
    the same as “public water system.”
    “Radioactive contaminants” refers to that group of contaminants designated
    “radioactive contaminants” in USEPA regulatory discussions and guidance
    documents. “Radioactive contaminants” include tritium, strontium-89, strontium-
    90, iodine-131, cesium-134, gross beta emitters, and other nuclides.
    BOARD NOTE: Derived from 40 CFR 141.25(c) Table B (2003)
    (2006). These
    radioactive contaminants must be reported in Consumer Confidence Reports
    under Subpart U of this Part when they are detected above the levels indicated in
    Section 611.720(c)(3).
    “Reliably and consistently” below a specified level for a contaminant means an
    Agency determination based on analytical results following the initial detection of a
    contaminant to determine the qualitative condition of water from an individual
    sampling point or source. The Agency must base this determination on the
    22
    consistency of analytical results, the degree below the MCL, the susceptibility of
    source water to variation, and other vulnerability factors pertinent to the contaminant
    detected that may influence the quality of water.
    BOARD NOTE: Derived from 40 CFR 141.23(b)(9), 141.24(f)(11)(ii), and
    141.24(f)(11)(iii) (2003) (2006).
    “Rem” means the unit of dose equivalent from ionizing radiation to the total body or
    any internal organ or organ system. A “millirem (mrem)” is 1/1000 of a rem.
    “Repeat compliance period” means a compliance period that begins after the initial
    compliance period.
    “Representative” means that a sample must reflect the quality of water that is
    delivered to consumers under conditions when all sources required to supply water
    under normal conditions are in use and all treatment is properly operating.
    “Residual disinfectant concentration” (“RDC” or “C” in CT calculations) means the
    concentration of disinfectant measured in mg/ℓ in a representative sample of water.
    For purposes of the requirement of Section 611.241(d) of maintaining a detectable
    RDC in the distribution system, “RDC” means a residual of free or combined
    chlorine.
    “Safe Drinking Water Act” or “SDWA” means the Public Health Service Act, as
    amended by the Safe Drinking Water Act, Pub. L. 93-523, 42 USC 300f et seq.
    “Sanitary survey” means an onsite review of the water source delineated WHPAs
    (identifying sources of contamination within the WHPAs and evaluations or the
    hydrogeologic sensitivity of the delineated WHPAs conducted under source water
    assessments or utilizing other relevant information where available), facilities,
    equipment, operation, and maintenance, and monitoring compliance of a public
    water system (PWS) for the purpose of evaluating
    to evaluate the adequacy of such
    source, facilities, equipment, operation, and maintenance for producing the system,
    its sources, and operations for the production and distributing distribution of safe
    drinking water.
    BOARD NOTE: Derived from 40 CFR 141.2 (2006) and 40 CFR 142.16(o)(2),
    as added at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    “Sedimentation” means a process for removal of solids before filtration by gravity or
    separation.
    “SEP” means special exception permit (Section 611.110).
    “Service connection,” as used in the definition of public water system, does not
    include a connection to a system that delivers water by a constructed conveyance
    other than a pipe if any of the following is true:
    23
    The water is used exclusively for purposes other than residential use
    (consisting of drinking, bathing, and cooking, or other similar uses);
    The Agency determines by issuing a SEP that alternative water for
    residential use or similar uses for drinking and cooking is provided to
    achieve the equivalent level of public health protection provided by the
    applicable national primary drinking water regulations; or
    The Agency determines by issuing a SEP that the water provided for
    residential use or similar uses for drinking, cooking, and bathing is
    centrally treated or treated at the point of entry by the provider, a
    pass-through entity, or the user to achieve the equivalent level of
    protection provided by the applicable national primary drinking water
    regulations.
    BOARD NOTE: See sections 1401(4)(B)(i)(II) and (4)(B)(i)(III) of SDWA (42
    USC 300f(4)(B)(i)(II) and (4)(B)(i)(III) (2000)).
    “Significant deficiency” means a deficiency identified by the Agency in a
    groundwater system pursuant to Section 611.803. A significant deficiency might
    include, but is not limited to, a defect in system design, operation, or maintenance
    or a failure or malfunction of the sources, treatment, storage, or distribution
    system that the Agency determines to be causing or have potential for causing the
    introduction of contamination into the water delivered to consumers.
    BOARD NOTE: Derived from 40 CFR 142.16(o)(2)(iv), as added at 71 Fed.
    Reg. 65574 (Nov. 8, 2006). The Agency must submit to USEPA a definition and
    description of at least one significant deficiency in each of the eight sanitary
    survey elements listed in Section 611.801(c) as part of the federal primacy
    requirements. The Board added the general description of what a significant
    deficiency might include in non-limiting terms, in order to provide this important
    definition within the body of the Illinois rules. No Agency submission to USEPA
    can provide definition within the context of Board regulations.
    “Slow sand filtration” means a process involving passage of raw water through a bed
    of sand at low velocity (generally less than 0.4 meters per hour (m/h)) resulting in
    substantial particulate removal by physical and biological mechanisms.
    “SOC” or “Synthetic organic chemical contaminant” refers to that group of
    contaminants designated as “SOCs,” or “synthetic organic chemicals” or “synthetic
    organic contaminants,” in USEPA regulatory discussions and guidance documents.
    “SOCs” include alachlor, aldicarb, aldicarb sulfone, aldicarb sulfoxide, atrazine,
    benzo(a)pyrene, carbofuran, chlordane, dalapon, dibromoethylene (ethylene
    dibromide or EDB), dibromochloropropane (DBCP), di(2-ethylhexyl)adipate, di(2-
    ethylhexyl)phthalate, dinoseb, diquat, endothall, endrin, glyphosate, heptachlor,
    heptachlor epoxide, hexachlorobenzene, hexachlorocyclopentadiene, lindane,
    methoxychlor, oxamyl, pentachlorophenol, picloram, simazine, toxaphene, poly-
    chlorinated biphenyls (PCBs), 2,4-D, 2,3,7,8-TCDD, and 2,4,5-TP.
    24
    BOARD NOTE: See the Board note appended to Section 611.311 for
    information relating to implementation of requirements relating to aldicarb,
    aldicarb sulfone, and aldicarb sulfoxide.
    “Source” means a well, reservoir, or other source of raw water.
    “Special irrigation district” means an irrigation district in existence prior to May
    18, 1994 that provides primarily agricultural service through a piped water system
    with only incidental residential use or similar use, where the system or the
    residential users or similar users of the system comply with either of the following
    exclusion conditions:
    The Agency determines by issuing a SEP that alternative water is
    provided for residential use or similar uses for drinking or cooking to
    achieve the equivalent level of public health protection provided by the
    applicable national primary drinking water regulations; or
    The Agency determines by issuing a SEP that the water provided for
    residential use or similar uses for drinking, cooking, and bathing is
    centrally treated or treated at the point of entry by the provider, a pass-
    through entity, or the user to achieve the equivalent level of protection
    provided by the applicable national primary drinking water regulations.
    BOARD NOTE: Derived from 40 CFR 141.2 (2003) (2006) and sections
    1401(4)(B)(i)(II) and (4)(B)(i)(III) of SDWA (42 USC 300f(4)(B)(i)(II) and
    (4)(B)(i)(III) (2000)).
    “Standard monitoring” means the monitoring, performed by the supplier pursuant
    to Section 611.921(a) and (b), at various specified locations in a distribution
    system including near entry points, at points that represent the average residence
    time in the distribution system, and at points in the distribution system that are
    representative of high TTHM and HAA5 concentrations throughout the
    distribution system.
    BOARD NOTE: Derived from 40 CFR 141.601(a) and (b) (2006).
    “Standard sample” means the aliquot of finished drinking water that is examined for
    the presence of coliform bacteria.
    “Subpart B system” means a public water system that uses surface water or
    groundwater under the direct influence of surface water as a source and which is
    subject to the requirements of Subpart B of this Part and the analytical and
    monitoring requirements of Sections 611.531, 611.532, 611.533, Appendix B of
    this Part, and Appendix C of this Part.
    “Subpart I compliance monitoring” means monitoring required to demonstrate
    compliance with disinfectant residuals, disinfection byproducts, and disinfection
    byproduct precursors requirements of Subpart I of this Part.
    25
    “Subpart I system” means a public water system that uses surface water or
    groundwater as a source and which is subject to the disinfectant residuals,
    disinfection byproducts, and disinfection byproduct precursors requirements of
    Subpart I of this Part.
    “Subpart Y compliance monitoring” means monitoring required to demonstrate
    compliance with Stage 2 disinfection byproducts requirements of Subpart Y of
    this Part.
    “Supplier of water” or “supplier” means any person who owns or operates a public
    water system (PWS). This term includes the “official custodian.”
    “Surface water” means all water that is open to the atmosphere and subject to surface
    runoff.
    “SUVA” means specific ultraviolet absorption at 254 nanometers (nm), which is an
    indicator of the humic content of water. It is a calculated parameter obtained by
    dividing a sample’s ultraviolet absorption at a wavelength of 254 nm (UV
    254
    ) (in
    m
    -1
    ) by its concentration of dissolved organic carbon (in mg/ℓ).
    “SWS” means “surface water system,” a public water supply (PWS) that uses only
    surface water sources, including “groundwater under the direct influence of surface
    water.”
    BOARD NOTE: Derived from 40 CFR 141.23(b)(2) and 141.24(f)(2) note (2003)
    (2006).
    “System-specific study plan” means the plan, submitted by the supplier to the
    Agency pursuant to Section 611.922, for studying the occurrence of TTHM and
    HAA5 in a supplier’s distribution system based on either monitoring results or
    modelling of the system.
    BOARD NOTE: Derived from 40 CFR 141.602 (2006).
    “System with a single service connection” means a system that supplies drinking
    water to consumers via a single service line.
    “Too numerous to count” means that the total number of bacterial colonies exceeds
    200 on a 47-mm diameter membrane filter used for coliform detection.
    “Total organic carbon” or “TOC” means total organic carbon (in mg/ℓ) measured
    using heat, oxygen, ultraviolet irradiation, chemical oxidants, or combinations of
    these oxidants that convert organic carbon to carbon dioxide, rounded to two
    significant figures.
    “Total trihalomethanes” or “TTHM” means the sum of the concentration of
    trihalomethanes (THMs), in milligrams per liter (mg/ℓ), rounded to two significant
    26
    figures.
    BOARD NOTE: See the definition of “trihalomethanes” for a listing of the four
    compounds that USEPA considers TTHMs to comprise.
    “Transient, non-community water system” or “transient non-CWS” means a non-
    CWS that does not regularly serve at least 25 of the same persons over six months of
    the year.
    BOARD NOTE: The federal regulations apply to all “public water systems,” which
    are defined as all systems having that have at least 15 service connections or which
    regularly serving serve water to at least 25 persons. (See 42 USC 300f(4).) The Act
    mandates that the Board and the Agency regulate “public water supplies,” which it
    defines as having at least 15 service connections or regularly serving 25 persons
    daily at least 60 days per year. (See Section 3.28 of the Act [415 ILCS 5/3.28].) The
    Department of Public Health regulates transient, non-community water systems.
    “Treatment” means any process that changes the physical, chemical,
    microbiological, or radiological properties of water, is under the control of the
    supplier, and is not a point-of-use treatment device or a point-of-entry treatment
    device as defined in this Section. Treatment includes, but is not limited to, aeration,
    coagulation, sedimentation, filtration, activated carbon treatment, disinfection, and
    fluoridation.
    “Trihalomethane” or “THM” means one of the family of organic compounds, named
    as derivatives of methane, in which three of the four hydrogen atoms in methane are
    each substituted by a halogen atom in the molecular structure. The THMs are the
    following compounds:
    Trichloromethane (chloroform),
    Dibromochloromethane,
    Bromodichloromethane, and
    Tribromomethane (bromoform)
    “Two-stage lime softening” means a process in which chemical addition and
    hardness precipitation occur in each of two distinct unit clarification processes in
    series prior to filtration.
    “μg” means micrograms (1/1,000,000 of a gram).
    “USEPA” means the U.S. Environmental Protection Agency.
    “Uncovered finished water storage facility” is a tank, reservoir, or other facility
    that is used to store water which will undergo no further treatment to reduce
    microbial pathogens except residual disinfection and which is directly open to the
    27
    atmosphere and which is used to store water that will undergo no further
    treatment except residual disinfection.
    “Very small system waiver” means the conditional waiver from the requirements
    of Subpart W of this Part applicable to a supplier that serves fewer than 500
    persons and which has taken TTHM and HAA5 samples pursuant to Subpart I of
    this Part.
    BOARD NOTE: Derived from 40 CFR 141.604 (2006).
    “Virus” means a virus of fecal origin that is infectious to humans by waterborne
    transmission.
    “VOC” or “volatile organic chemical contaminant” refers to that group of
    contaminants designated as “VOCs,” “volatile organic chemicals,” or “volatile
    organic contaminants,” in USEPA regulatory discussions and guidance documents.
    “VOCs” include benzene, dichloromethane, tetrachloromethane (carbon tetra-
    chloride), trichloroethylene, vinyl chloride, 1,1,1-trichloroethane (methyl
    chloroform), 1,1-dichloroethylene, 1,2-dichloroethane, cis-1,2-dichloroethylene,
    ethylbenzene, monochlorobenzene, o-dichlorobenzene, styrene, 1,2,4-trichloro-
    benzene, 1,1,2-trichloroethane, tetrachloroethylene, toluene, trans-1,2-dichloro-
    ethylene, xylene, and 1,2-dichloropropane.
    “Waterborne disease outbreak” means the significant occurrence of acute infectious
    illness, epidemiologically associated with the ingestion of water from a public water
    system (PWS) that is deficient in treatment, as determined by the appropriate local or
    State agency.
    “Wellhead protection area” or “WHPA” means the surface and subsurface
    recharge area surrounding a community water supply well or well field,
    delineated outside of any applicable setback zones (pursuant to Section
    17.2 of the Act (415 ILCS 5/17.2)) pursuant to Illinois’ Wellhead
    Protection Program, through which contaminants are reasonably likely to
    move toward such well or well field.
    BOARD NOTE: The Agency uses two guidance documents for
    identification of WHPAs:
    “Guidance Document for Groundwater Protection Needs Assessments,”
    Illinois Environmental Protection Agency, Illinois State Water Survey,
    and Illinois State Geologic Survey joint report, January 1995; and
    “The Illinois Wellhead Protection Program Pursuant to Section 1428 of
    the Federal Safe Drinking Water Act,” Illinois Environmental Protection
    Agency, No. 22480, October 1992.
    “Wellhead protection program” means the wellhead protection program for the State
    of Illinois, approved by USEPA under Section 1428 of the SDWA, 42 USC 300h-7.
    28
    BOARD NOTE: Derived from 40 CFR 141.71(b) (2003) (2006). The wellhead
    protection program includes the “groundwater protection needs assessment” under
    Section 17.1 of the Act [415 ILCS 5/17.1] and 35 Ill. Adm. Code 615-617.
    “Wholesale system” means a public water system that treats source water as
    necessary to produce finished water, which then delivers some or all of that
    finished water to another public water system. Delivery by a wholesale system
    may be through a direct connection or through the distribution system of one or
    more consecutive systems.
    BOARD NOTE: Derived from 40 CFR 141.2 (2003) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.102
    Incorporations by Reference
    a)
    Abbreviations and short-name listing of references. The following names and
    abbreviated names, presented in alphabetical order, are used in this Part to refer to
    materials incorporated by reference:
    “ASTM Method” means a method published by and available from the
    American Society for Testing and Materials (ASTM).
    “Colisure Test” means “Colisure Presence/Absence Test for Detection and
    Identification of Coliform Bacteria and Escherichia Coli in Drinking
    Water,” available from Millipore Corporation, Technical Services
    Department.
    “Colitag® Test” means “Colitag® Product as a Test for Detection and
    Identification of Coliforms and E. coli Bacteria in Drinking Water and
    Source Water as Required in National Primary Drinking Water
    Regulations,” available from CPI International.
    “Determination of Inorganic Oxyhalide” means “Determination of
    Inorganic Oxyhalide Disinfection By-Products in Drinking Water Using
    Ion Chromatography with the Addition of a Postcolumn Reagent for Trace
    Bromate Analysis,” available from NTIS.
    “Dioxin and Furan Method 1613” means “Tetra- through Octa-
    Chlorinated Dioxins and Furans by Isotope-Dilution HRGC/HRMS,”
    available from NTIS.
    “E*Colite Test” means “Charm E*Colite Presence/Absence Test for
    Detection and Identification of Coliform Bacteria and Escherichia coli in
    Drinking Water,” available from Charm Sciences, Inc. and USEPA, Water
    Resource Center.
    29
    “EC-MUG” means “Method 9221 F: Multiple-Tube Fermentation
    Technique for Members of the Coliform Group, Escherichia coli
    Procedure (Proposed),” available from American Public Health
    Association and American Waterworks Association.
    “Enterolert” means “Evaluation of Enterolert for Enumeration of
    Enterococci in Recreational Waters,” available from American Society for
    Microbiology.
    “GLI Method 2” means GLI Method 2, “Turbidity,” Nov. 2, 1992,
    available from Great Lakes Instruments, Inc.
    “Hach FilterTrak Method 10133” means “Determination of Turbidity by
    Laser Nephelometry,” available from Hach Co.
    “HASL Procedure Manual” means HASL Procedure Manual, HASL 300,
    available from ERDA Health and Safety Laboratory.
    “Kelada 01” means “Kelada Automated Test Methods for Total Cyanide,
    Acid Dissociable Cyanide, And Thiocyanate,” Revision 1.2, August 2001,
    EPA # 821–B–01–009 EPA 821/B–01/009, available from the National
    Technical Information Service (NTIS).
    “m-ColiBlue24 Test” means “Total Coliforms and E. coli Membrane
    Filtration Method with m-ColiBlue24® Broth,” available from Hach
    Company and USEPA, Water Resource Center.
    “Membrane Filter Technique using Chromocult Doliform Agar” means
    “Chromocult Coliform Agar Presence/Absence Membrane Filter Test
    Method for Detection and Identification of Coliform Bacteria and
    Escherichia coli in Finished Waters,” available from EMD Chemicals Inc
    .
    “NA-MUG” means “Method 9222 G: Membrane Filter Technique for
    Members of the Coliform Group, MF Partition Procedures,” available
    from American Public Health Association and American Waterworks
    Association.
    “NCRP” means “National Council on Radiation Protection.”
    “NTIS” means “National Technical Information Service.”
    “New Jersey Radium Method” means “Determination of Radium 228 in
    Drinking Water,” available from the New Jersey Department of
    Environmental Protection.
    30
    “New York Radium Method” means “Determination of Ra-226 and Ra-
    228 (Ra-02),” available from the New York Department of Public Health.
    “ONGP-MUG ONPG-MUG Test” (meaning “minimal medium ortho-
    nitrophenyl-beta-d-galactopyranoside-4-methyl-umbelliferyl-beta-d-
    glucuronide test”), also called the “Autoanalysis Colilert System,” is
    Method 9223, available in “Standard Methods for the Examination of
    Water and Wastewater,” 18th, 19th, 20th, or 21st ed., from American
    Public Health Association and the American Water Works Association.
    “Palintest Method 1001” means “Method Number 1001,” available from
    Palintest, Ltd. or the Hach Company.
    “QuikChem Method 10–204–00–1-X” means “Digestion and distillation
    of total cyanide in drinking and wastewaters using MICRO DIST and
    determination of cyanide by flow injection analysis,” available from
    Lachat Instruments.
    “Readycult Coliforms 100 Presence/Absence Test” means “Readycult
    Coliforms 100 Presence/Absence Test for Detection and Identification of
    Coliform Bacteria and Escherichia coli in Finished Waters,” available
    from EMD Chemicals Inc.
    “SimPlate Method” means “IDEXX SimPlate TM HPC Test Method for
    Heterotrophs in Water,” available from IDEXX Laboratories, Inc.
    “Radiochemical Methods” means “Interim Radiochemical Methodology
    for Drinking Water,” available from NTIS.
    “Standard Methods” means “Standard Methods for the Examination of
    Water and Wastewater,” available from the American Public Health
    Association or the American Waterworks Association.
    “Syngenta AG-625” means “Atrazine in Drinking Water by
    Immunoassay,” February 2001 is available from Syngenta Crop
    Protection, Inc.
    “Technical Bulletin 601” means “Technical Bulletin 601, Standard
    Method of Testing for Nitrate in Drinking Water,” July 1994, available
    from Analytical Technology, Inc.
    “Technicon Methods” means “Fluoride in Water and Wastewater,”
    available from Bran & Luebbe.
    “USDOE Manual” means “EML Procedures Manual,” available from the
    United State Department of Energy.
    31
    “USEPA Asbestos Methods-100.1” means Method 100.1, “Analytical
    Method for Determination of Asbestos Fibers in Water,” September 1983,
    available from NTIS.
    “USEPA Asbestos Methods-100.2” means Method 100.2, “Determination
    of Asbestos Structures over 10-mm in Length in Drinking Water,” June
    1994, available from NTIS.
    “USEPA Environmental Inorganics Methods” means “Methods for the
    Determination of Inorganic Substances in Environmental Samples,”
    August 1993, available from NTIS.
    “USEPA Environmental Metals Methods” means “Methods for the
    Determination of Metals in Environmental Samples,” available from
    NTIS.
    “USEPA Inorganic Methods” means “Methods for Chemical Analysis of
    Water and Wastes,” March 1983, available from NTIS.
    “USEPA Interim Radiochemical Methods” means “Interim Radiochemical
    Methodology for Drinking Water,” EPA 600/4-75-008 EPA 600/4-75/008
    (revised), March 1976. Available from NTIS.
    “USEPA Method 1600” means “Method 1600: Enterococci in Water by
    Membrane Filtration Using Membrane-Enterococcus Indoxyl–b–D–
    Glucoside Agar (mEI),” available from USEPA, Water Resource Center.
    “USEPA Method 1601” means “Method 1601: Male-specific (F
    +
    ) and
    Somatic Coliphage in Water by Two-step Enrichment Procedure,”
    available from USEPA, Water Resource Center.
    “USEPA Method 1602” means “Method 1602: Male-specific (F
    +
    ) and
    Somatic Coliphage in Water by Single Agar Layer (SAL) Procedure,”
    available from USEPA, Water Resource Center.
    “USEPA Method 1604” means “Method 1604: Total Coliforms and
    Escherichia coli in Water by Membrane Filtration Using a Simultaneous
    Detection Technique (MI Medium),” available from USEPA, Water
    Resource Center.
    “USEPA Method 1622 (05)” means “Method 1622: Cryptosporidium in
    Water by Filtration/IMS/FA,” December 2005, available from USEPA,
    Office of Ground Water and Drinking Water.
    “USEPA Method 1622 (01)” means “Method 1622: Cryptosporidium in
    32
    Water by Filtration/IMS/FA,” April 2001, available from USEPA, Office
    of Ground Water and Drinking Water.
    “USEPA Method 1622 (99)” means “Method 1622: Cryptosporidium in
    Water by Filtration/IMS/FA,” January 1999, available from USEPA,
    Office of Ground Water and Drinking Water.
    “USEPA Method 1623 (05)” means “Method 1623: Cryptosporidium and
    Giardia in Water by Filtration/IMS/FA,” December 2005, available from
    the USEPA, Office of Ground Water and Drinking Water.
    “USEPA Method 1623 (01)” means “Method 1623: Cryptosporidium and
    Giardia in Water by Filtration/IMS/FA,” April 2001, available from the
    USEPA, Office of Ground Water and Drinking Water.
    “USEPA Method 1623 (99)” means “Method 1623: Cryptosporidium and
    Giardia in Water by Filtration/IMS/FA,” April 1999, available from the
    USEPA, Office of Ground Water and Drinking Water.
    “USEPA NERL Method 415.3 (rev. 1.1)” means Method 415.3, Revision
    1.1, “Determination of Total Organic Carbon and Specific UV
    Absorbance at 254 nm in Source Water and Drinking Water,” USEPA,
    February 2005, EPA 600/R-05/055. Available from the USEPA, Office of
    Research and Development.
    “USEPA OGWDW Methods” means one of the methods listed as
    available from the USEPA, Office of Ground Water and Drinking Water
    (Methods 317.0 (rev. 2.0), 326.0 (rev. 1.0), 327.0 (rev. 1.1), 515.4 (rev.
    1.0), 531.2 (rev. 1.0), and 552.3 (rev. 1.0)).
    “USEPA Organic Methods” means “Methods for the Determination of
    Organic Compounds in Drinking Water,” July 1991, for Methods 502.2,
    505, 507, 508, 508A, 515.1, and 531.1; “Methods for the Determination of
    Organic Compounds in Drinking Water—Supplement I,” July 1990, for
    Methods 506, 547, 550, 550.1, and 551; and
    “Methods for the
    Determination of Organic Compounds in Drinking Water—Supplement
    II,” August 1992, for Methods 504.1, 508.1,
    515.2, 524.2, 525.2, 548.1,
    549.1, 552.1, 552.2
    , and 555, available from NTIS. Methods 504.1, 508.1,
    and 525.2 are available from EPA EMSL; “Methods for the Determination
    of Organic Compounds” in Drinking Water—Supplement II, August 1992,
    for Method 552.1; and “Methods for the Determination of Organic
    Compounds in Drinking Water—Supplement III,” August 1995, for
    Methods 502.2, 524.2, 551.1, and 552.2. Method 515.4, “Determination of
    Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction,
    Derivatization and Fast Gas Chromatography with Electron Capture
    Detection,” Revision 1.0, April 2000, EPA 815/B–00/001, and Method
    33
    531.2, “Measurement of N-methylcarbamoyloximes and N-
    methylcarbamates in Water by Direct Aqueous Injection HPLC with
    Postcolumn Derivatization,” Revision 1.0, September 2001, EPA
    815/B/01/002 EPA 815/B-01/002, are both available on-line from
    USEPA, Office of Ground Water and Drinking Water.
    “USEPA Organic and Inorganic Methods” means “Methods for the
    Determination of Organic and Inorganic Compounds in Drinking Water,
    Volume 1,” EPA 815/R-00/014, PB2000-106981, August 2000. Available
    from NTIS.
    “USEPA Radioactivity Methods” means “Prescribed Procedures for
    Measurement of Radioactivity in Drinking Water,” EPA 600/4-80-032
    EPA 600/4-80/032, August 1980. Available from NTIS.
    “USEPA Radiochemical Analyses” means “Radiochemical Analytical
    Procedures for Analysis of Environmental Samples,” March 1979.
    Available from NTIS.
    “USEPA Radiochemistry Methods” means “Radiochemistry Procedures
    Manual,” EPA 520/5-84-006 EPA 520/5-84/006, December 1987.
    Available from NTIS.
    “USEPA Technical Notes” means “Technical Notes on Drinking Water
    Methods,” available from NTIS.
    “USGS Methods” means “Methods of Analysis by the U.S. Geological
    Survey National Water Quality Laboratory--—Determination of Inorganic
    and Organic Constituents in Water and Fluvial Sediments,” available from
    NTIS and USGS.
    “Waters Method B-1011” means “Waters Test Method for the
    Determination of Nitrite/Nitrate in Water Using Single Column Ion
    Chromatography,” available from Waters Corporation, Technical Services
    Division.
    b)
    The Board incorporates the following publications by reference:
    APHA.
    American Public Health Association, 1015 Fifteenth Street NW,
    Washington, DC 20005 (800-645-5476)
    202-777-2742.
    “Standard Methods for the Examination of Water and
    Wastewater,” 17th Edition, 1989 (referred to as “Standard
    Methods, 17th ed.”). See the methods listed separately for the
    same references under American Waterworks Association.
    34
    “Standard Methods for the Examination of Water and
    Wastewater,” 18th Edition, 1992, including “Supplement to the
    18th Edition of Standard Methods for the Examination of Water
    and Wastewater,” 1994 (collectively referred to as “Standard
    Methods, 18th ed.”). See the methods listed separately for the
    same references under American Waterworks Association.
    “Standard Methods for the Examination of Water and
    Wastewater,” 19th Edition, 1995 (referred to as “Standard
    Methods, 19th ed.”). See the methods listed separately for the
    same references under American Waterworks Association.
    “Standard Methods for the Examination of Water and
    Wastewater,” 20th Edition, 1998 (referred to as “Standard
    Methods, 20th ed.”). See the methods listed separately for the
    same references under American Waterworks Association.
    “Standard Methods for the Examination of Water and
    Wastewater,” 21st Edition, 2005 (referred to as “Standard
    Methods, 21st ed.”). See the methods listed separately for the
    same references under American Waterworks Association.
    American Society for Microbiology, 1752 N Street N.W., Washington,
    DC 20036, 202-737-3600:
    “Evaluation of Enterolert for Enumeration of Enterococci in
    Recreational Waters,” Applied and Environmental Microbiology,
    Oct. 1996, vol. 62, no. 10, p. 3881 (referred to as “Enterolert”),
    referenced in Section 611.802.
    BOARD NOTE: At the table to 40 CFR 141.402(c)(2), USEPA
    approved the method as described in the above literature review.
    The method itself is embodied in the printed instructions to the
    proprietary kit available from IDEXX Laboratories, Inc.
    (accessible on-line and available by download from www.asm.org,
    as “Enterolert™ Procedure”). ASTM approved the method as
    “Standard Test Method for Enterococci in Water Using
    Enterolert™,” which is available in two versions from ASTM:
    ASTM D 6503-99 (superceded) and ASTM D 6503-99 (2005).
    While it is more conventional to incorporate the method as
    presented in the kit instructions or as approved by ASTM by
    reference, the Board is constrained to incorporate the version that
    appears in the technical literature by reference, which is the
    version that USEPA has explicitly approved.
    AWWA.
    American Waterworks Water Works Association et al., 6666
    35
    West Quincy Ave., Denver, CO 80235 (303-794-7711).
    “National Field Evaluation of a Defined Substrate Method for the
    Simultaneous Enumeration of Total Coliforms and Escherichia coli
    for Drinking Water: Comparison with the Standard Multiple Tube
    Fermentation Method,” S.C. Edberg, M.J. Allen & D.B. Smith,
    Applied Environmental Microbiology, vol. 54, iss. 6, pp 1595-
    1601 (1988), referenced in Appendix D to this Part.
    “Standard Methods for the Examination of Water and
    Wastewater,” 13th Edition, 1971 (referred to as “Standard
    Methods, 13th ed.”).
    Method 302, Gross Alpha and Gross Beta Radioactivity in
    Water (Total, Suspended, and Dissolved), referenced in
    Section 611.720.
    Method 303, Total Radioactive Strontium and Strontium 90
    in Water, referenced in Section 611.720.
    Method 304, Radium in Water by Precipitation, referenced
    in Section 611.720.
    Method 305, Radium 226 by Radon in Water (Soluble,
    Suspended, and Total), referenced in Section 611.720.
    Method 306, Tritium in Water, referenced in Section
    611.720.
    “Standard Methods for the Examination of Water and
    Wastewater,” 17th Edition, 1989 (referred to as “Standard
    Methods, 17th ed.”).
    Method 7110 B, Gross Alpha and Gross Beta Radioactivity
    in Water (Total, Suspended, and Dissolved), referenced in
    Section 611.720.
    Method 7500-Cs B, Radioactive Cesium, Precipitation
    Method, referenced in Section 611.720.
    Method 7500-
    3
    H B, Tritium in Water, referenced in Section
    611.720.
    Method 7500-I B, Radioactive Iodine, Precipitation
    Method, referenced in Section 611.720.
    36
    Method 7500-I C, Radioactive Iodine, Ion-Exchange
    Method, referenced in Section 611.720.
    Method 7500-I D, Radioactive Iodine, Distillation Method,
    referenced in Section 611.720.
    Method 7500-Ra B, Radium in Water by Precipitation,
    referenced in Section 611.720.
    Method 7500-Ra C, Radium 226 by Radon in Water
    (Soluble, Suspended, and Total), referenced in Section
    611.720.
    Method 7500-Ra D, Radium, Sequential Precipitation
    Method (Proposed), referenced in Section 611.720.
    Method 7500-Sr B, Total Radioactive Strontium and
    Strontium 90 in Water, referenced in Section 611.720.
    Method 7500-U B, Uranium, Radiochemical Method
    (Proposed), referenced in Section 611.720.
    Method 7500-U C, Uranium, Isotopic Method (Proposed),
    referenced in Section 611.720.
    “Standard Methods for the Examination of Water and
    Wastewater,” 18th Edition, 1992 (referred to as “Standard
    Methods, 18th ed.”).
    Method 2130 B, Turbidity, Nephelometric Method,
    referenced in Section 611.531.
    Method 2320 B, Alkalinity, Titration Method, referenced in
    Section 611.611.
    Method 2510 B, Conductivity, Laboratory Method,
    referenced in Section 611.611.
    Method 2550, Temperature, Laboratory and Field Methods,
    referenced in Section 611.611.
    Method 3111 B, Metals by Flame Atomic Absorption
    Spectrometry, Direct Air-Acetylene Flame Method,
    referenced in Sections 611.611 and 611.612.
    Method 3111 D, Metals by Flame Atomic Absorption
    37
    Spectrometry, Direct Nitrous Oxide-Acetylene Flame
    Method, referenced in Section 611.611.
    Method 3112 B, Metals by Cold-Vapor Atomic Absorption
    Spectrometry, Cold-Vapor Atomic Absorption
    Spectrometric Method, referenced in Section 611.611.
    Method 3113 B, Metals by Electrothermal Atomic
    Absorption Spectrometry, Electrothermal Atomic
    Absorption Spectrometric Method, referenced in Sections
    611.611 and 611.612.
    Method 3114 B, Metals by Hydride Generation/Atomic
    Absorption Spectrometry, Manual Hydride
    Generation/Atomic Absorption Spectrometric Method,
    referenced in Section 611.611.
    Method 3120 B, Metals by Plasma Emission Spectroscopy,
    Inductively Coupled Plasma (ICP) Method, referenced in
    Sections 611.611 and 611.612.
    Method 3500-Ca D, Calcium, EDTA Titrimetric Method,
    referenced in Section 611.611.
    Method 3500-Mg E, Magnesium, Calculation Method,
    referenced in Section 611.611.
    Method 4110 B, Determination of Anions by Ion
    Chromatography, Ion Chromatography with Chemical
    Suppression of Eluent Conductivity, referenced in Section
    611.611.
    Method 4500-CN
    -
    C, Cyanide, Total Cyanide after
    Distillation, referenced in Section 611.611.
    Method 4500-CN
    -
    E, Cyanide, Colorimetric Method,
    referenced in Section 611.611.
    Method 4500-CN
    -
    F, Cyanide, Cyanide-Selective Electrode
    Method, referenced in Section 611.611.
    Method 4500-CN
    -
    G, Cyanide, Cyanides Amenable to
    Chlorination after Distillation, referenced in Section
    611.611.
    Method 4500-Cl D, Chlorine, Amperometric Titration
    38
    Method, referenced in Section 611.531.
    Method 4500-Cl E, Chlorine, Low-Level Amperometric
    Titration Method, referenced in Section 611.531.
    Method 4500-Cl F, Chlorine, DPD Ferrous Titrimetric
    Method, referenced in Section 611.531.
    Method 4500-Cl G, Chlorine, DPD Colorimetric Method,
    referenced in Section 611.531.
    Method 4500-Cl H, Chlorine, Syringaldazine (FACTS)
    Method, referenced in Section 611.531.
    Method 4500-Cl I, Chlorine, Iodometric Electrode Method,
    referenced in Section 611.531.
    Method 4500-ClO
    2
    C, Chlorine Dioxide, Amperometric
    Method I, referenced in Section 611.531.
    Method 4500-ClO
    2
    D, Chlorine Dioxide, DPD Method,
    referenced in Section 611.531.
    Method 4500-ClO
    2
    E, Chlorine Dioxide, Amperometric
    Method II (Proposed), referenced in Section 611.531.
    Method 4500-F
    -
    B, Fluoride, Preliminary Distillation Step,
    referenced in Section 611.611.
    Method 4500-F
    -
    C, Fluoride, Ion-Selective Electrode
    Method, referenced in Section 611.611.
    Method 4500-F
    -
    D, Fluoride, SPADNS Method, referenced
    in Section 611.611.
    Method 4500-F
    -
    E, Fluoride, Complexone Method,
    referenced in Section 611.611.
    Method 4500-H
    +
    B, pH Value, Electrometric Method,
    referenced in Section 611.611.
    Method 4500-NO
    2
    -
    B, Nitrogen (Nitrite), Colorimetric
    Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    D, Nitrogen (Nitrate), Nitrate Electrode
    Method, referenced in Section 611.611.
    39
    Method 4500-NO
    3
    -
    E, Nitrogen (Nitrate), Cadmium
    Reduction Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    F, Nitrogen (Nitrate), Automated
    Cadmium Reduction Method, referenced in Section
    611.611.
    Method 4500-O
    3
    B, Ozone (Residual) (Proposed), Indigo
    Colorimetric Method, referenced in Section 611.531.
    Method 4500-P E, Phosphorus, Ascorbic Acid Method,
    referenced in Section 611.611.
    Method 4500-P F, Phosphorus, Automated Ascorbic Acid
    Reduction Method, referenced in Section 611.611.
    Method 4500-Si D, Silica, Molybdosilicate Method,
    referenced in Section 611.611.
    Method 4500-Si E, Silica, Heteropoly Blue Method,
    referenced in Section 611.611.
    Method 4500-Si F, Silica, Automated Method for
    Molybdate-Reactive Silica, referenced in Section 611.611.
    Method 6651, Glyphosate Herbicide (Proposed), referenced
    in Section 611.645.
    Method 7110 B, Gross Alpha and Beta Radioactivity
    (Total, Suspended, and Dissolved), Evaporation Method for
    Gross Alpha-Beta, referenced in Section 611.720.
    Method 7110 C, Gross Alpha and Beta Radioactivity
    (Total, Suspended, and Dissolved), Coprecipitation Method
    for Gross Alpha Radioactivity in Drinking Water
    (Proposed), referenced in Section 611.720.
    Method 7500-Cs B, Radioactive Cesium, Precipitation
    Method, referenced in Section 611.720.
    Method 7500-
    3
    H B, Tritium, Liquid Scintillation
    Spectrometric Method, referenced in Section 611.720.
    Method 7500-I B, Radioactive Iodine, Precipitation
    Method, referenced in Section 611.720.
    40
    Method 7500-I C, Radioactive Iodine, Ion-Exchange
    Method, referenced in Section 611.720.
    Method 7500-I D, Radioactive Iodine, Distillation Method,
    referenced in Section 611.720.
    Method 7500-Ra B, Radium, Precipitation Method,
    referenced in Section 611.720.
    Method 7500-Ra C, Radium, Emanation Method,
    referenced in Section 611.720.
    Method 7500-Ra D, Radium, Sequential Precipitation
    Method (Proposed), referenced in Section 611.720.
    Method 7500-Sr B, Total Radioactive Strontium and
    Strontium 90, Precipitation Method, referenced in Section
    611.720.
    Method 7500-U B, Uranium, Radiochemical Method
    (Proposed), referenced in Section 611.720.
    Method 7500-U C, Uranium, Isotopic Method (Proposed),
    referenced in Section 611.720.
    Method 9215 B, Heterotrophic Plate Count, Pour Plate
    Method, referenced in Section 611.531.
    Method 9221 A, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Introduction,
    referenced in Sections 611.526 and 611.531.
    Method 9221 B, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Standard Total
    Coliform Fermentation Technique, referenced in Sections
    611.526 and 611.531.
    Method 9221 C, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Estimation of
    Bacterial Density, referenced in Sections 611.526 and
    611.531.
    Method 9221 D, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Presence-Absence (P-
    A) Coliform Test, referenced in Section 611.526.
    41
    Method 9221 E, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Fecal Coliform
    Procedure, referenced in Sections 611.526 and 611.531.
    Method 9222 A, Membrane Filter Technique for Members
    of the Coliform Group, Introduction, referenced in Sections
    611.526 and 611.531.
    Method 9222 B, Membrane Filter Technique for Members
    of the Coliform Group, Standard Total Coliform Membrane
    Filter Procedure, referenced in Sections 611.526 and
    611.531.
    Method 9222 C, Membrane Filter Technique for Members
    of the Coliform Group, Delayed-Incubation Total Coliform
    Procedure, referenced in Sections 611.526 and 611.531.
    Method 9222 D, Membrane Filter Technique for Members
    of the Coliform Group, Fecal Coliform Membrane Filter
    Procedure, referenced in Section 611.531.
    Method 9223, Chromogenic Substrate Coliform Test
    (Proposed) (also referred to as the variations “Autoanalysis
    Colilert System” and “Colisure Test”), referenced in
    Sections 611.526, and 611.531.
    Method 9223 B, Chromogenic Substrate Coliform Test
    (Proposed), referenced in Section 611.1004.
    “Supplement to the 18th Edition of Standard Methods for the
    Examination of Water and Wastewater,” American Public Health
    Association, 1994.
    Method 6610, Carbamate Pesticide Method, referenced in
    Section 611.645.
    “Standard Methods for the Examination of Water and
    Wastewater,” 19th Edition, 1995 (referred to as “Standard
    Methods, 19th ed.”).
    Method 2130 B, Turbidity, Nephelometric Method,
    referenced in Section 611.531.
    Method 2320 B, Alkalinity, Titration Method, referenced in
    Section 611.611.
    42
    Method 2510 B, Conductivity, Laboratory Method,
    referenced in Section 611.611.
    Method 2550, Temperature, Laboratory, and Field
    Methods, referenced in Section 611.611.
    Method 3111 B, Metals by Flame Atomic Absorption
    Spectrometry, Direct Air-Acetylene Flame Method,
    referenced in Sections 611.611 and 611.612.
    Method 3111 D, Metals by Flame Atomic Absorption
    Spectrometry, Direct Nitrous Oxide-Acetylene Flame
    Method, referenced in Section 611.611.
    Method 3112 B, Metals by Cold-Vapor Atomic Absorption
    Spectrometry, Cold-Vapor Atomic Absorption
    Spectrometric Method, referenced in Section 611.611.
    Method 3113 B, Metals by Electrothermal Atomic
    Absorption Spectrometry, Electrothermal Atomic
    Absorption Spectrometric Method, referenced in Sections
    611.611 and 611.612.
    Method 3114 B, Metals by Hydride Generation/Atomic
    Absorption Spectrometry, Manual Hydride
    Generation/Atomic Absorption Spectrometric Method,
    referenced in Section 611.611.
    Method 3120 B, Metals by Plasma Emission Spectroscopy,
    Inductively Coupled Plasma (ICP) Method, referenced in
    Section
    Sections 611.611 and 611.612.
    Method 3500-Ca D, Calcium, EDTA Titrimetric Method,
    referenced in Section 611.611.
    Method 3500-Mg E, Magnesium, Calculation Method,
    referenced in Section 611.611.
    Method 4110 B, Determination of Anions by Ion
    Chromatography, Ion Chromatography with Chemical
    Suppression of Eluent Conductivity, referenced in Section
    611.611.
    Method 4500-Cl D, Chlorine, Amperometric Titration
    Method, referenced in Sections 611.381 and 611.531.
    43
    Method 4500-Cl E, Chlorine, Low-Level Amperometric
    Titration Method, referenced in Sections 611.381 and
    611.531.
    Method 4500-Cl F, Chlorine, DPD Ferrous Titrimetric
    Method, referenced in Sections 611.381 and 611.531.
    Method 4500-Cl G, Chlorine, DPD Colorimetric Method,
    referenced in Sections 611.381 and 611.531.
    Method 4500-Cl H, Chlorine, Syringaldazine (FACTS)
    Method, referenced in Sections 611.381 and 611.531.
    Method 4500-Cl I, Chlorine, Iodometric Electrode Method,
    referenced in Sections 611.381 and 611.531.
    Method 4500-ClO
    2
    C, Chlorine Dioxide, Amperometric
    Method I, referenced in Section 611.531.
    Method 4500-ClO
    2
    D, Chlorine Dioxide, DPD Method,
    referenced in Sections 611.381 and 611.531.
    Method 4500-ClO
    2
    E, Chlorine Dioxide, Amperometric
    Method II (Proposed), referenced in Sections 611.381 and
    611.531.
    Method 4500-CN
    -
    C, Cyanide, Total Cyanide after
    Distillation, referenced in Section 611.611.
    Method 4500-CN
    -
    E, Cyanide, Colorimetric Method,
    referenced in Section 611.611.
    Method 4500-CN
    -
    F, Cyanide, Cyanide-Selective Electrode
    Method, referenced in Section 611.611.
    Method 4500-CN
    -
    G, Cyanide, Cyanides Amenable to
    Chlorination after Distillation, referenced in Section
    611.611.
    Method 4500-F
    -
    B, Fluoride, Preliminary Distillation Step,
    referenced in Section 611.611.
    Method 4500-F
    -
    C, Fluoride, Ion-Selective Electrode
    Method, referenced in Section 611.611.
    44
    Method 4500-F
    -
    D, Fluoride, SPADNS Method, referenced
    in Section 611.611.
    Method 4500-F
    -
    E, Fluoride, Complexone Method,
    referenced in Section 611.611.
    Method 4500-H
    +
    B, pH Value, Electrometric Method,
    referenced in Section 611.611.
    Method 4500-NO
    2
    -
    B, Nitrogen (Nitrite), Colorimetric
    Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    D, Nitrogen (Nitrate), Nitrate Electrode
    Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    E, Nitrogen (Nitrate), Cadmium
    Reduction Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    F, Nitrogen (Nitrate), Automated
    Cadmium Reduction Method, referenced in Section
    611.611.
    Method 4500-O
    3
    B, Ozone (Residual) (Proposed), Indigo
    Colorimetric Method, referenced in Section 611.531.
    Method 4500-P E, Phosphorus, Ascorbic Acid Method,
    referenced in Section 611.611.
    Method 4500-P F, Phosphorus, Automated Ascorbic Acid
    Reduction Method, referenced in Section 611.611.
    Method 4500-Si D, Silica, Molybdosilicate Method,
    referenced in Section 611.611.
    Method 4500-Si E, Silica, Heteropoly Blue Method,
    referenced in Section 611.611.
    Method 4500-Si F, Silica, Automated Method for
    Molybdate-Reactive Silica, referenced in Section 611.611.
    Method 5910 B, UV Absorbing Organic Constituents,
    Ultraviolet Absorption Method, referenced in Section
    611.381.
    Method 6251 B, Disinfection Byproducts: Haloacetic Acids
    and Trichlorophenol, Micro Liquid-Liquid Extraction Gas
    45
    Chromatographic Method, referenced in Section 611.381.
    Method 6610, Carbamate Pesticide Method, referenced in
    Section 611.645.
    Method 6651, Glyphosate Herbicide (Proposed), referenced
    in Section 611.645.
    Method 7110 B, Gross Alpha and Gross Beta
    Radioactivity, Evaporation Method for Gross Alpha-Beta,
    referenced in Section 611.720.
    Method 7110 C, Gross Alpha and Beta Radioactivity
    (Total, Suspended, and Dissolved), Coprecipitation Method
    for Gross Alpha Radioactivity in Drinking Water
    (Proposed), referenced in Section 611.720.
    Method 7120 B, Gamma-Emitting Radionuclides, Gamma
    Spectrometric Method, referenced in Section 611.720.
    Method 7500-Cs B, Radioactive Cesium, Precipitation
    Method, referenced in Section 611.720.
    Method 7500-
    3
    H B, Tritium, Liquid Scintillation
    Spectrometric Method, referenced in Section 611.720.
    Method 7500-I B, Radioactive Iodine, Precipitation
    Method, referenced in Section 611.720.
    Method 7500-I C, Radioactive Iodine, Ion-Exchange
    Method, referenced in Section 611.720.
    Method 7500-I D, Radioactive Iodine, Distillation Method,
    referenced in Section 611.720.
    Method 7500-Ra B, Radium, Precipitation Method,
    referenced in Section 611.720.
    Method 7500-Ra C, Radium, Emanation Method,
    referenced in Section 611.720.
    Method 7500-Ra D, Radium, Sequential Precipitation
    Method, referenced in Section 611.720.
    Method 7500-Sr B, Total Radiactive Strontium and
    Strontium 90, Precipitation Method, referenced in Section
    46
    611.720.
    Method 7500-U B, Uranium, Radiochemical Method,
    referenced in Section 611.720.
    Method 7500-U C, Uranium, Isotopic Method, referenced
    in Section 611.720.
    Method 9215 B, Heterotrophic Plate Count, Pour Plate
    Method, referenced in Section 611.531.
    Method 9221 A, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Introduction,
    referenced in Sections 611.526 and 611.531.
    Method 9221 B, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Standard Total
    Coliform Fermentation Technique, referenced in Sections
    611.526 and 611.531.
    Method 9221 C, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Estimation of
    Bacterial Density, referenced in Sections 611.526 and
    611.531.
    Method 9221 D, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Presence-Absence (P-
    A) Coliform Test, referenced in Section 611.526.
    Method 9221 E, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Fecal Coliform
    Procedure, referenced in Sections 611.526 and 611.531.
    Method 9222 A, Membrane Filter Technique for Members
    of the Coliform Group, Introduction, referenced in Sections
    611.526 and 611.531.
    Method 9222 B, Membrane Filter Technique for Members
    of the Coliform Group, Standard Total Coliform Membrane
    Filter Procedure, referenced in Sections 611.526 and
    611.531.
    Method 9222 C, Membrane Filter Technique for Members
    of the Coliform Group, Delayed-Incubation Total Coliform
    Procedure, referenced in Sections 611.526 and 611.531.
    47
    Method 9222 D, Membrane Filter Technique for Members
    of the Coliform Group, Fecal Coliform Membrane Filter
    Procedure, referenced in Section 611.531.
    Method 9222 G, Membrane Filter Technique for Members
    of the Coliform Group, MF Partition Procedures,
    referenced in Section 611.526.
    Method 9223, Chromogenic Substrate Coliform Test
    (Proposed) (also referred to as the variations “Autoanalysis
    Colilert System” and “Colisure Test”), referenced in
    Sections 611.526, and 611.531.
    Method 9223 B, Chromogenic Substrate Coliform Test
    (Proposed), referenced in Section 611.1004.
    “Supplement to the 19th Edition of Standard Methods for the
    Examination of Water and Wastewater,” American Public Health
    Association, 1996.
    Method 5310 B, TOC, Combustion-Infrared Method,
    referenced in Section 611.381.
    Method 5310 C, TOC, Persulfate-Ultraviolet Oxidation
    Method, referenced in Section 611.381.
    Method 5310 D, TOC, Wet-Oxidation Method, referenced
    in Section 611.381.
    “Standard Methods for the Examination of Water and
    Wastewater,” 20th Edition, 1998 (referred to as “Standard
    Methods, 20th ed.”).
    Method 2130 B, Turbidity, Nephelometric Method,
    referenced in Section 611.531.
    Method 2320 B, Alkalinity, Titration Method, referenced in
    Section 611.611.
    Method 2510 B, Conductivity, Laboratory Method,
    referenced in Section 611.611.
    Method 2550, Temperature, Laboratory, and Field
    Methods, referenced in Section 611.611.
    Method 3120 B, Metals by Plasma Emission Spectroscopy,
    48
    Inductively Coupled Plasma (ICP) Method, referenced in
    Section 611.612.
    Method 3500-Ca B, Calcium, EDTA Titrimetric Method,
    referenced in Section 611.611.
    Method 3500-Mg B, Magnesium, EDTA Titrimetric
    Method, referenced in Section 611.611.
    Method 4110 B, Determination of Anions by Ion
    Chromatography, Ion Chromatography with Chemical
    Suppression of Eluent Conductivity, referenced in Section
    611.611.
    Method 4500-CN
    -
    C, Cyanide, Total Cyanide after
    Distillation, referenced in Section 611.611.
    Method 4500-CN
    -
    E, Cyanide, Colorimetric Method,
    referenced in Section 611.611.
    Method 4500-CN
    -
    F, Cyanide, Cyanide-Selective Electrode
    Method, referenced in Section 611.611.
    Method 4500-CN
    -
    G, Cyanide, Cyanides Amenable to
    Chlorination after Distillation, referenced in Section
    611.611.
    Method 4500-Cl D, Chlorine, Amperometric Titration
    Method, referenced in Section 611.531.
    Method 4500-Cl E, Chlorine, Low-Level Amperometric
    Titration Method, referenced in Section 611.531.
    Method 4500-Cl F, Chlorine, DPD Ferrous Titrimetric
    Method, referenced in Section 611.531.
    Method 4500-Cl G, Chlorine, DPD Colorimetric Method,
    referenced in Section 611.531.
    Method 4500-Cl H, Chlorine, Syringaldazine (FACTS)
    Method, referenced in Section 611.531.
    Method 4500-Cl I, Chlorine, Iodometric Electrode Method,
    referenced in Section 611.531.
    Method 4500-ClO
    2
    C, Chlorine Dioxide, Amperometric
    49
    Method I, referenced in Section 611.531.
    Method 4500-ClO
    2
    D, Chlorine Dioxide, DPD Method,
    referenced in Section 611.531.
    Method 4500-ClO
    2
    E, Chlorine Dioxide, Amperometric
    Method II (Proposed), referenced in Section and 611.531.
    Method 4500-F
    -
    B, Fluoride, Preliminary Distillation Step,
    referenced in Section 611.611.
    Method 4500-F
    -
    C, Fluoride, Ion-Selective Electrode
    Method, referenced in Section 611.611.
    Method 4500-F
    -
    D, Fluoride, SPADNS Method, referenced
    in Section 611.611.
    Method 4500-F
    -
    E, Fluoride, Complexone Method,
    referenced in Section 611.611.
    Method 4500-H
    +
    B, pH Value, Electrometric Method,
    referenced in Section 611.611.
    Method 4500-NO
    2
    -
    B, Nitrogen (Nitrite), Colorimetric
    Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    D, Nitrogen (Nitrate), Nitrate Electrode
    Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    E, Nitrogen (Nitrate), Cadmium
    Reduction Method, referenced in Section 611.611.
    Method 4500-NO
    3
    -
    F, Nitrogen (Nitrate), Automated
    Cadmium Reduction Method, referenced in Section
    611.611.
    Method 4500-O
    3
    B, Ozone (Residual) (Proposed), Indigo
    Colorimetric Method, referenced in Section 611.531.
    Method 4500-P E, Phosphorus, Ascorbic Acid Method,
    referenced in Section 611.611.
    Method 4500-P F, Phosphorus, Automated Ascorbic Acid
    Reduction Method, referenced in Section 611.611.
    Method 4500-Si C, Silica, Molybdosilicate Method,
    50
    referenced in Section 611.611.
    Method 4500-Si D, Silica, Heteropoly Blue Method,
    referenced in Section 611.611.
    Method 4500-Si E, Silica, Automated Method for
    Molybdate-Reactive Silica, referenced in Section 611.611.
    Method 5910 B, UV-Absorbing Organic Constituents,
    Ultraviolet Absorption Method, referenced in Sections
    611.381 and 611.382.
    Method 6251, Disinfection By-Products: Haloacetic Acids
    and Trichlorophenol, referenced in Section 611.381.
    Method 6610, Carbamate Pesticide Method, referenced in
    Section 611.645.
    Method 6651, Glyphosate Herbicide (Proposed), referenced
    in Section 611.645.
    Method 7110 B, Gross Alpha and Gross Beta
    Radioactivity, Evaporation Method for Gross Alpha-Beta,
    referenced in Section 611.720.
    Method 7110 C, Gross Alpha and Beta Radioactivity
    (Total, Suspended, and Dissolved), Coprecipitation Method
    for Gross Alpha Radioactivity in Drinking Water
    (Proposed), referenced in Section 611.720.
    Method 7120-B, Gamma-Emitting Radionuclides, Gamma
    Spectrometric Method, referenced in Section 611.720.
    Method 7500-Cs B, Radioactive Cesium, Precipitation
    Method, referenced in Section 611.720.
    Method 7500-
    3
    H B, Tritium, Liquid Scintillation
    Spectrometric Method, referenced in Section 611.720.
    Method 7500-I B, Radioactive Iodine, Precipitation
    Method, referenced in Section 611.720.
    Method 7500-I C, Radioactive Iodine, Ion-Exchange
    Method, referenced in Section 611.720.
    Method 7500-I D, Radioactive Iodine, Distillation Method,
    referenced in Section 611.720.
    51
    Method 7500-Ra B, Radium, Precipitation Method,
    referenced in Section 611.720.
    Method 7500-Ra C, Radium, Emanation Method,
    referenced in Section 611.720.
    Method 7500-Sr B, Total Radiactive Strontium and
    Strontium 90, Precipitation Method, referenced in Section
    611.720.
    Method 7500-U B, Uranium, Radiochemical Method,
    referenced in Section 611.720.
    Method 7500-U C, Uranium, Isotopic Method, referenced
    in Section 611.720.
    Method 9215 B, Heterotrophic Plate Count, Pour Plate
    Method, referenced in Section 611.531.
    Method 9221 A, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Introduction,
    referenced in Sections 611.526 and 611.531.
    Method 9221 B, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Standard Total
    Coliform Fermentation Technique, referenced in Sections
    611.526 and 611.531.
    Method 9221 C, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Estimation of
    Bacterial Density, referenced in Sections 611.526 and
    611.531.
    Method 9221 D, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Presence-Absence (P-
    A) Coliform Test, referenced in Sections 611.526.
    Method 9221 E, Multiple-Tube Fermentation Technique
    for Members of the Coliform Group, Fecal Coliform
    Procedure, referenced in Sections 611.526 and 611.531.
    Method 9221 F, Multiple-Tube Fermentation Technique for
    Members of the Coliform Group, Escherichia Coli
    Procedure (Proposed), referenced in Section 611.802.
    52
    Method 9222 A, Membrane Filter Technique for Members
    of the Coliform Group, Introduction, referenced in Sections
    611.526 and 611.531.
    Method 9222 B, Membrane Filter Technique for Members
    of the Coliform Group, Standard Total Coliform Membrane
    Filter Procedure, referenced in Sections 611.526 and
    611.531.
    Method 9222 C, Membrane Filter Technique for Members
    of the Coliform Group, Delayed-Incubation Total Coliform
    Procedure, referenced in Sections 611.526 and 611.531.
    Method 9222 D, Membrane Filter Technique for Members
    of the Coliform Group, Fecal Coliform Membrane Filter
    Procedure, referenced in Section 611.531.
    Method 9222 G, Membrane Filter Technique for Members
    of the Coliform Group, MF Partition Procedures,
    referenced in Section 611.526.
    Method 9223, Chromogenic Substrate Coliform Test
    (Proposed) (also referred to as the variations “Autoanalysis
    Colilert System” and “Colisure Test”), referenced in
    Sections 611.526, and 611.531.
    Method 9223 B, Chromogenic Substrate Coliform Test
    (also referred to as the variations “Autoanalysis Colilert
    System” and “Colisure Test”), referenced in Sections
    611.802 and 611.1004.
    Method 9230 B, Fecal Streptococcus and Enterococcus
    Groups, Multiple Tube Techniques, referenced in Section
    611.802.
    Method 9230 C, Fecal Streptococcus and Enterococcus
    Groups, Membrane Filter Techniques, referenced in
    Section 611.802.
    “Standard Methods for the Examination of Water and
    Wastewater,” 21st Edition, 2005 (referred to as “Standard
    Methods, 21st ed.”).
    Method 4500-Cl D, Chlorine, Amperometric Titration
    Method, referenced in Section 611.381.
    53
    Method 4500-Cl E, Chlorine, Low-Level Amperometric
    Titration Method, referenced in Section 611.381.
    Method 4500-Cl F, Chlorine, DPD Ferrous Titrimetric
    Method, referenced in Section 611.381.
    Method 4500-Cl G, Chlorine, DPD Colorimetric Method,
    referenced in Section 611.381.
    Method 4500-Cl H, Chlorine, Syringaldazine (FACTS)
    Method, referenced in Section 611.381.
    Method 4500-Cl I, Chlorine, Iodometric Electrode Method,
    referenced in Section 611.381.
    Method 4500-ClO
    2
    E, Chlorine Dioxide, Amperometric
    Method II (Proposed), referenced in Section and 611.381.
    Method 5310 B, TOC, Combustion-Infrared Method,
    referenced in Section 611.381.
    Method 5310 C, TOC, Persulfate-Ultraviolet Oxidation
    Method, referenced in Section 611.381.
    Method 5310 D, TOC, Wet-Oxidation Method, referenced
    in Section 611.381.
    Method 5910 B, UV-Absorbing Organic Constituents,
    Ultraviolet Absorption Method, referenced in Sections
    611.381 and 611.382.
    Method 6251, Disinfection By-Products: Haloacetic Acids
    and Trichlorophenol, referenced in Section 611.381.
    BOARD NOTE: Standard Methods is available online at
    www.standardmethods.org.
    Analytical Technology, Inc. ATI Orion, 529 Main Street, Boston, MA
    02129.
    Technical Bulletin 601, “Standard Method of Testing for Nitrate in
    Drinking Water,” July, 1994, PN 221890-001 (referred to as
    “Technical Bulletin 601”), referenced in Section 611.611.
    ASTM. American Society for Testing and Materials, 100 Barr Harbor
    Drive, West Conshohocken, PA 19428-2959 (610-832-9585).
    54
    ASTM Method D511-93 A and B, “Standard Test Methods for
    Calcium and Magnesium in Water,” “Test Method A—
    Complexometric Titration” & “Test Method B—Atomic
    Absorption Spectrophotometric,” approved 1993, referenced in
    Section 611.611.
    ASTM Method D515-88 A, “Standard Test Methods for
    Phosphorus in Water,” “Test Method A—Colorimetric Ascorbic
    Acid Reduction,” approved August 19, 1988, referenced in Section
    611.611.
    ASTM Method D859-88, “Standard Test Method for Silica in
    Water,” approved August 19, 1988, referenced in Section 611.611.
    ASTM Method D1067-92 B, “Standard Test Methods for Acidity
    or Alkalinity in Water,” “Test Method B—Electrometric or Color-
    Change Titration,” approved May 15, 1992, referenced in Section
    611.611.
    ASTM Method D1125-91 A, “Standard Test Methods for
    Electrical Conductivity and Resistivity of Water,” “Test Method
    A—Field and Routine Laboratory Measurement of Static (Non-
    Flowing) Samples,” approved June 15, 1991, referenced in Section
    611.611.
    ASTM Method D1179-93 B, “Standard Test Methods for Fluoride
    in Water,” “Test Method B—Ion Selective Electrode,” approved
    1993, referenced in Section 611.611.
    ASTM Method D1253-86, “Standard Test Method for Residual
    Chlorine in Water,” reapproved 1992, referenced in Section
    611.381.
    ASTM Method D1253-96, “Standard Test Method for Residual
    Chlorine in Water,” reapproved 1996, referenced in Section
    611.381.
    ASTM Method D1253-03, “Standard Test Method for Residual
    Chlorine in Water,” reapproved 2003, referenced in Section
    611.381.
    ASTM Method D1293-84, “Standard Test Methods for pH of
    Water,” “Test Method A—Precise Laboratory Measurement” &
    “Test Method B—Routine or Continuous Measurement,” approved
    October 26, 1984, referenced in Section 611.611.
    55
    ASTM Method D1688-90 A or C, “Standard Test Methods for
    Copper in Water,” “Test Method A—Atomic Absorption, Direct”
    & “Test Method C—Atomic Absorption, Graphite Furnace,”
    approved March 15, 1990, referenced in Section 611.611.
    ASTM Method D2036-91 A or B, “Standard Test Methods for
    Cyanide in Water,” “Test Method A—Total Cyanides after
    Distillation” & “Test Method B—Cyanides Amenable to
    Chlorination by Difference,” approved September 15, 1991,
    referenced in Section 611.611.
    ASTM Method D2459-72, “Standard Test Method for Gamma
    Spectrometry in Water,” approved July 28, 1972, discontinued
    1988, referenced in Section 611.720.
    ASTM Method D2460-90, “Standard Test Method for
    Radionuclides of Radium in Water,” approved 1990, referenced in
    Section 611.720.
    ASTM Method D2907-91, “Standard Test Methods for
    Microquantities of Uranium in Water by Fluorometry,” “Test
    Method A—Direct Fluorometric” & “Test Method B—
    Extraction,” approved June 15, 1991, referenced in Section
    611.720.
    ASTM Method D2972-93 B or C, “Standard Test Methods for
    Arsenic in Water,” “Test Method B—Atomic Absorption, Hydride
    Generation” & “Test Method C—Atomic Absorption, Graphite
    Furnace,” approved 1993, referenced in Section 611.611.
    ASTM Method D3223-91, “Standard Test Method for Total
    Mercury in Water,” approved September 23, 1991, referenced in
    Section 611.611.
    ASTM Method D3454-91, “Standard Test Method for Radium-226
    in Water,” approved 1991, referenced in Section 611.720.
    ASTM Method D3559-96 D, “Standard Test Methods for Lead in
    Water,” “Test Method D—Atomic Absorption, Graphite Furnace,”
    approved August 6, 1990, referenced in Section 611.611.
    ASTM Method D3645-97 B, “Standard Test Methods for
    Beryllium in Water,” “Method B—Atomic Absorption, Graphite
    Furnace,” approved 1993, referenced in Section 611.611.
    56
    ASTM Method D3649-91, “Standard Test Method for High-
    Resolution Gamma-Ray Spectrometry of Water,” approved 1991,
    referenced in Section 611.720.
    ASTM Method D3697-92, “Standard Test Method for Antimony
    in Water,” approved June 15, 1992, referenced in Section 611.611.
    ASTM Method D3859-93 A, “Standard Test Methods for
    Selenium in Water,” “Method A—Atomic Absorption, Hydride
    Method,” approved 1993, referenced in Section 611.611.
    ASTM Method D3867-90 A and B, “Standard Test Methods for
    Nitrite-Nitrate in Water,” “Test Method A—Automated Cadmium
    Reduction” & “Test Method B--Manual Cadmium Reduction,”
    approved January 10, 1990, referenced in Section 611.611.
    ASTM Method D3972-90, “Standard Test Method for Isotopic
    Uranium in Water by Radiochemistry,” approved 1990, referenced
    in Section 611.720.
    ASTM Method D4107-91, “Standard Test Method for Tritium in
    Drinking Water,” approved 1991, referenced in Section 611.720.
    ASTM Method D4327-91, “Standard Test Method for Anions in
    Water by Ion Chromatography,” approved October 15, 1991,
    referenced in Section 611.611.
    ASTM Method D4785-88, “Standard Test Method for Low-Level
    Iodine-131 in Water,” approved 1988, referenced in Section
    611.720.
    ASTM Method D5174-91, “Standard Test Method for Trace
    Uranium in Water by Pulsed-Laser Phosphorimetry,” approved
    1991, referenced in Section 611.720.
    ASTM Method D5673-03, “Standard Test Method for Elements in
    Water by Inductively Coupled Plasma—Mass Spectrometry,”
    approved 2003, referenced in Section 611.720.
    ASTM Method D6581-00, “Standard Test Method for Bromate,
    Bromide, Chlorate, and Chlorite in Drinking Water by Chemically
    Suppressed Ion Chromatography,” approved 2000, referenced in
    Section 611.381.
    Bran & Luebbe, 1025 Busch Parkway, Buffalo Grove, IL 60089.
    57
    “Fluoride in Water and Wastewater,” Industrial Method #129-
    71W, December 1972 (referred to as “Technicon Methods:
    Method #129-71W”). See 40 CFR 141.23(k)(1), footnote 11
    (2005) (2006), referenced in Section 611.611.
    “Fluoride in Water and Wastewater,” #380-75WE, February 1976
    (referred to as “Technicon Methods: Method #380-75WE”). See
    40 CFR 141.23(k)(1), footnote 11 (2005) (2006), referenced in
    Section 611.611.
    Charm Sciences, Inc., 659 Andover St., Lawrence, MA 01843–1032:
    “Charm E*Colite Presence/Absence Test for Detection and
    Identification of Coliform Bacteria and Escherichia coli in
    Drinking Water,” January 9, 1998 (referred to as “E*Colite Test”),
    referenced in Section 611.802 (also available from USEPA, Water
    Resource Center).
    CPI International, Inc., 5580 Skylane Blvd., Santa Rosa, CA 95403 (800-
    878-7654/fax: 707-545-7901/Internet address:
    www.cpiinternational.com).
    “Colitag® Product as a Test for Detection and Identification of
    Coliforms and E. coli Bacteria in Drinking Water and Source
    Water as Required in National Primary Drinking Water
    Regulations,” August 2001, referenced in Section 611.526.
    EMD Chemicals Inc. (an affiliate of Merck KGgA, Darmstadt, Germany),
    480 S. Democrat Road, Gibbstown, NJ 08027–1297. (800-222–0342/e-
    mail: adellenbusch@emscience.com).
    “Chromocult Coliform Agar Presence/Absence Membrane Filter
    Test Method for Detection and Identification of Coliform Bacteria
    and Escherichia coli in Finished Waters,” November 2000,
    Version 1.0, referenced in Section 611.526
    .
    “Readycult Coliforms 100 Presence/Absence Test for Detection
    and Identification of Coliform Bacteria and Escherichia coli in
    Finished Waters,” November 2000, Version 1.0, referenced in
    Section 611.526.
    ERDA Health and Safety Laboratory, New York, NY.
    HASL Procedure Manual, HASL 300, 1973. See 40 CFR
    141.25(b)(2) (2005) (2006), referenced in Section 611.720.
    58
    Great Lakes Instruments, Inc., 8855 North 55th Street, Milwaukee, WI
    53223.
    GLI Method 2, “Turbidity,” Nov. 2, 1992, referenced in Section
    611.531.
    The Hach Company, P.O. Box 389, Loveland, CO 80539-0389 (800-227-
    4224).
    “Lead in Drinking Water by Differential Pulse Anodic Stripping
    Voltammetry,” Method 1001, August 1999, referenced in Section
    611.611.
    “Determination of Turbidity by Laser Nephelometry,” January
    2000, Revision 2.0 (referred to as “Hach FilterTrak Method
    10133”), referenced in Section 611.531.
    “Total Coliforms and E. coli Membrane Filtration Method with m-
    ColiBlue24® Broth,” Method No. 10029, Revision 2, August 17,
    1999 (referred to as “m-ColiBlue24 Test”), referenced in Section
    611.802 (also available from USEPA, Water Resource Center).
    IDEXX Laboratories, Inc., One IDEXX Drive, Westbrook, Maine 04092
    (800-321-0207).
    “IDEXX SimPlate TM HPC Test Method for Heterotrophs in
    Water,” November 2000 (referred to as “SimPlate method”),
    referenced in Section 611.531.
    Lachat Instruments, 6645 W. Mill Rd., Milwaukee, WI 53218 (414–358–
    4200).
    “Digestion and distillation of total cyanide in drinking and
    wastewaters using MICRO DIST and determination of cyanide by
    flow injection analysis,” Revision 2.1, November 30, 2000
    (referred to as “QuikChem Method 10-204-00-1-X”), referenced in
    Section 611.611.
    Millipore Corporation, Technical Services Department, 80 Ashby Road,
    Milford, MA 01730 (800-654-5476).
    Colisure Presence/Absence Test for Detection and Identification of
    Coliform Bacteria and Escherichia Coli in Drinking Water,
    February 28, 1994 (referred to as “Colisure Test”), referenced in
    Section 611.526.
    59
    NCRP. National Council on Radiation Protection, 7910 Woodmont Ave.,
    Bethesda, MD (301-657-2652).
    “Maximum Permissible Body Burdens and Maximum Permissible
    Concentrations of Radionuclides in Air and in Water for
    Occupational Exposure,” NCRP Report Number 22, June 5, 1959,
    referenced in Section 611.101.
    NSF. National Sanitation Foundation International, 3475 Plymouth Road,
    PO Box 130140, Ann Arbor, Michigan 48113-0140 (734-769-8010).
    NSF Standard 61, section 9, November 1998, referenced in Sections
    611.126 and 611.356.
    NTIS. National Technical Information Service, U.S. Department of
    Commerce, 5285 Port Royal Road, Springfield, VA 22161 (703-487-4600
    or 800-553-6847).
    “Interim Radiochemical Methodology for Drinking Water,” EPA
    600/4-75-008 (revised), March 1976 (referred to as “USEPA
    Interim Radiochemical Methods”), referenced in Section 611.720.
    (Pages 1, 4, 6, 9, 13, 16, 24, 29, 34)
    “Kelada Automated Test Methods for Total Cyanide, Acid
    Dissociable Cyanide, And Thiocyanate,” Revision 1.2, August
    2001, EPA # 821–B–01–009 EPA 821/B–01-009 (referred to as
    “Kelada 01”), referenced in Section 611.611.
    “Maximum Permissible Body Burdens and Maximum Permissible
    Concentrations of Radionuclides in Air and in Water for
    Occupational Exposure,” NBS (National Bureau of Standards)
    Handbook 69, as amended August 1963, U.S. Department of
    Commerce, referenced in Section 611.330.
    Method 100.1, “Analytical Method for Determination of Asbestos
    Fibers in Water,” EPA-600/4-83-043
    EPA 600/4-83-043,
    September 1983, Doc. No. PB83-260471 (referred to as “USEPA
    Asbestos Methods-100.1”), referenced in Section 611.611.
    Method 100.2, “Determination of Asbestos Structures over 10-mm
    in Length in Drinking Water,” EPA-600/4-83-043 EPA 600/R-94-
    134, June 1994, Doc. No. PB94-201902 (referred to as “USEPA
    Asbestos Methods-100.2”), referenced in Section 611.611.
    “Methods for Chemical Analysis of Water and Wastes,” March
    1983, EPA 600/4-79-020,
    Doc. No. PB84-128677 (referred to as
    60
    “USEPA Inorganic Methods”). (Methods 150.1, 150.2, and 245.2,
    which formerly appeared in this reference, are available from
    USEPA EMSL.), referenced in Section 611.611.
    “Methods for the Determination of Inorganic Substances in
    Environmental Samples,” August 1993, EPA 600/R-93-100, Doc.
    No. PB94-120821 (referred to as “USEPA Environmental Inorganic
    Methods”), referenced in Sections 611.381, 611.531, and 611.611.
    (For methods 180.1, 300.0, 335.4, 353.2, and 365.1.)
    “Methods for the Determination of Metals in Environmental
    Samples,” June 1991, EPA 600/4-91-010, Doc. No. PB91-231498
    and “Methods for the Determination of Metals in Environmental
    Samples—Supplement I,” May 1994, EPA 600/R-94-111, Doc.
    No. PB95-125472 (referred to as “USEPA Environmental Metals
    Methods”), referenced in Sections 611.611, 611.612, and 611.720.
    (For methods 200.7, 200.8, 200.9, and 245.1.)
    “Methods for the Determination of Organic and Inorganic
    Compounds in Drinking Water, Volume 1” August 2000, EPA
    815/R-00/014, Doc. No. PB2000-106981 (referred to as “USEPA
    Organic and Inorganic Methods”), referenced in Section 611.381.
    (For methods 300.1 and 321.8.)
    “Methods for the Determination of Organic Compounds in
    Drinking Water,” December 1988, revised July 1991, EPA-600/4-
    88/039 EPA 600/4-88/039, Doc. No. PB91-231480 (referred to as
    “USEPA Organic Methods”), referenced in Sections 611.645 and
    611.648. (For methods 502.2, 505, 507, 508, 508A, 515.1, and
    531.1.)
    “Methods for the Determination of Organic Compounds in
    Drinking Water—Supplement I,” July 1990, EPA-600/4-90-020
    EPA 600/4-90/020, Doc. No. PB91-146027 (referred to as
    “USEPA Organic Methods”), referenced in Section 611.645. (For
    methods 506, 547, 550, 550.1, and 551.)
    “Methods for the Determination of Organic Compounds in
    Drinking Water—Supplement II,” August 1992, EPA-600/R-92-
    129 EPA 600/R-92/129, Doc. No. PB92-207703 (referred to as
    “USEPA Organic Methods”), referenced in Section
    Sections
    611.381 and 611.645. (For methods 515.2, 524.2, 548.1, 549.1,
    552.1, and 555.)
    “Methods for the Determination of Organic Compounds in Drinking
    Water—Supplement III,” August 1995, EPA 600/R-95/131, Doc.
    61
    No. PB95-261616, (referred to as “USEPA Organic Methods”),
    referenced in Sections 611.381 and 611.645. (For methods 502.2,
    524.2, 551.1, and 552.2.)
    “Prescribed Procedures for Measurement of Radioactivity in
    Drinking Water,” EPA 600/4-80-032 EPA 600/4-80/032, August
    1980, (document number Doc. No. PB 80-224744) (referred to as
    “USEPA Radioactivity Methods”), referenced in Section 611.720.
    (Methods For methods 900, 901, 901.1, 902, 903, 903.1, 904, 905,
    906, 908, 908.1)
    “Procedures for Radiochemical Analysis of Nuclear Reactor
    Aqueous Solutions,” H.L. Krieger and S. Gold, EPA-R4-73-014,
    May 1973, Doc. No. PB222-154/7BA, referenced in Section
    611.720.
    “Radiochemical Analytical Procedures for Analysis of
    Environmental Samples,” March 1979, Doc. No. EMSL LV
    053917 (referred to as “USEPA Radiochemical Analyses”),
    referenced in Section 611.720. (Pages 1, 19, 33, 65, 87, 92)
    “Radiochemistry Procedures Manual,” EPA-520/5-84-006 EPA
    520/5-84-006, December 1987, August 1984, Doc. No. PB-84-
    215581 PB84-215581 (referred to as “USEPA Radiochemistry
    Methods”), referenced in Section 611.720. (Methods 00-01, 00-
    02, 00-07, H-02, Ra-03, Ra-04, Ra-05, Sr-04)
    “Technical Notes on Drinking Water Methods,” EPA-600/R-94-
    173 EPA 600/R-94/173, October 1994, Doc. No. PB-104766
    PB95-104766 (referred to as “USEPA Technical Notes”),
    referenced in Sections 611.531, 611.611, and 611.685.
    BOARD NOTE: USEPA made the following assertion with
    regard to this reference at 40 CFR 141.23(k)(1) and 141.24(e) and
    (n)(11) (2005)
    (2006): “This document contains other analytical
    test procedures and approved analytical methods that remain
    available for compliance monitoring until July 1, 1996.”
    “Method 1613: Tetra- through Octa-Chlorinated Dioxins and
    Furans by Isotope Dilution HRGC/HRMS,” October 1994, EPA-
    821/B-94-005 EPA 821/B-94/005, Doc. No. 94-104774 (referred
    to as “Dioxin and Furan Method 1613”), referenced in Section
    611.645.
    USEPA Method 326.0, Revision 1.0, “Determination of Inorganic
    Oxyhalide Disinfection By-Products in Drinking Water Using Ion
    62
    Chromatography Incorporating the Addition of a Suppressor
    Acidified Postcolumn Reagent for Trace Bromate Analysis,”
    USEPA, June 2002, EPA 815/R-03/007, Doc. No. PB2003-107402
    (referred to as “OGWDW Methods, Method 326.0, rev. 1.0”),
    referenced in Sections 611.381 and 611.382.
    BOARD NOTE: Also available from United States Environmental
    Protection Agency, Office of Ground Water and Drinking Water.
    New Jersey Department of Environment, Division of Environmental
    Quality, Bureau of Radiation and Inorganic Analytical Services, 9 Ewing
    Street, Trenton, NJ 08625.
    “Determination of Radium 228 in Drinking Water,” August 1990
    (referred to as “New Jersey Radium Method”), referenced in
    Section 611.720.
    New York Department of Health, Radiological Sciences Institute, Center
    for Laboratories and Research, Empire State Plaza, Albany, NY 12201.
    “Determination of Ra-226 and Ra-228 (Ra-02),” January 1980,
    Revised June 1982 (referred to as “New York Radium Method”),
    referenced in Section 611.720.
    Palintest, Ltd., 21 Kenton Lands Road, P.O. Box 18395, Erlanger, KY
    (800-835-9629).
    “Lead in Drinking Water by Differential Pulse Anodic Stripping
    Voltammetry,” Method 1001, August 1999 (referred to as
    “Palintest Method 1001”), referenced in Section 611.611.
    Syngenta Crop Protection, Inc., 410 Swing Road, Post Office Box 18300,
    Greensboro, NC 27419 (336-632–6000).
    “Atrazine in Drinking Water by Immunoassay,” February 2001
    (referred to as “Syngenta AG-625”), referenced in Section
    611.645.
    United States Department of Energy, available at the Environmental
    Measurements Laboratory, U.S. Department of Energy, 376 Hudson
    Street, New York, NY 10014-3621.
    “EML Procedures Manual,” 27th Edition, Volume 1, 1990
    (referred to as “USDOE Manual”), referenced in Section 611.720.
    United States Environmental Protection Agency, Office of Ground Water
    63
    and Drinking Water (accessible on-line and available by download from
    http://www.epa.gov/safewater/methods/)
    .
    USEPA Method 317.0, Revision 2.0, “Determination of Inorganic
    Oxyhalide Disinfection By-Products in Drinking Water Using Ion
    Chromatography with the Addition of a Postcolumn Reagent for
    Trace Bromate Analysis,” USEPA, July 2001, EPA 815/B-01/001
    (referred to as “OGWDW Methods, Method 317.0, rev. 2.0”),
    referenced in Section 611.381 and 611.382.
    USEPA Method 326.0, Revision 1.0, “Determination of Inorganic
    Oxyhalide Disinfection By-Products in Drinking Water Using Ion
    Chromatography Incorporating the Addition of a Suppressor
    Acidified Postcolumn Reagent for Trace Bromate Analysis,”
    USEPA, June 2002, EPA 815/R-03/007 (referred to as “OGWDW
    Methods, Method 326.0, rev. 1.0”), referenced in Sections 611.381
    and 611.382.
    BOARD NOTE: Also available from NTIS.
    USEPA Method 327.0, Revision 1.1, “Determination of Chlorine
    Dioxide and Chlorite Ion in Drinking Water Using Lissamine
    Green B and Horseradish Peroxidase with Detection by Visible
    Spectrophotometry,” USEPA, May 2005, EPA 815/R-05/008
    (referred to as “OGWDW Methods, Method 327.0, rev. 1.1”),
    referenced in Section 611.381.
    USEPA Method 515.4, Revision 1.0, “Determination of
    Chlorinated Acids in Drinking Water by Liquid-Liquid
    Microextraction, Derivatization and Fast Gas Chromatography
    with Electron Capture Detection,” Revision
    1.0, April 2000, EPA-
    815/B-00-001 EPA 815/B-00/001 (document file name
    “met515_4.pdf”) (referred to as “OGWDW Methods, Method
    515.4, rev. 1.0”), referenced in Section 611.645.
    USEPA Method 531.2, Revision 1.0, “Measurement of N-
    methylcarbamoyloximes and N-methylcarbamates in Water by
    Direct Aqueous Injection HPLC with Postcolumn Derivatization,”
    Revision 1.0, September 2001, EPA-815/B-01-002 EPA 815/B-
    01/002 (document file name “met531_2.pdf”) (referred to as
    “OGWDW Methods, Method 531.2, rev. 1.0”), referenced in
    Section 611.645.
    USEPA Method 552.3, Revision 1.0, “Determination of Haloacetic
    Acids and Dalapon in Drinking Water by Liquid-liquid
    Microextraction, Derivatization, and Gas Chromatography with
    64
    Electron Capture Detection,” USEPA, July 2003, EPA 815/B-
    03/002 (referred to as “OGWDW Methods, Method 552.3, rev.
    1.0”), referenced in Section 611.381.
    USEPA Method 1622 (05), “Method 1622: Cryptosporidium in
    Water by Filtration/IMS/FA,” December 2005, EPA 815/R-05/001
    (referred to as “USEPA Method 1622 (05)”), referenced in
    Sections 611.1004 and 611.1007.
    USEPA Method 1622 (01), “Method 1622: Cryptosporidium in
    Water by Filtration/IMS/FA,” April 2001, EPA 821/R-01/026,
    (referred to as “USEPA Method 1622 (01)”), referenced in Section
    611.1007.
    USEPA Method 1622 (99), “Method 1622: Cryptosporidium in
    Water by Filtration/IMS/FA,” April 1999, EPA 821/R-99/001,
    (referred to as “USEPA Method 1622 (99)”), referenced in Section
    611.1007.
    USEPA Method 1623 (05), “Method 1623: Cryptosporidium and
    Giardia in Water by Filtration/IMS/FA,” December 2005, EPA
    815/R-05/002 (referred to as “USEPA Method 1623 (05)”),
    referenced in Sections 611.1004 and 611.1007.
    USEPA Method 1623 (01), “Method 1623: Cryptosporidium and
    Giardia in Water by Filtration/IMS/FA,” April 2001, EPA 821/R-
    01/025 (referred to as “USEPA Method 1623 (01)”), referenced in
    Section 611.1007.
    USEPA Method 1623 (99), “Method 1623: Cryptosporidium and
    Giardia in Water by Filtration/IMS/FA,” January 1999, EPA
    821/R-99/006 (referred to as “USEPA Method 1623 (99)”),
    referenced in Sections 611.1007.
    United States Environmental Protection Agency, EMSL, Cincinnati, OH
    45268 (513-569-7586).
    “Interim Radiochemical Methodology for Drinking Water,” EPA-
    600/4-75-008 EPA 600/4-75/008 (revised), March 1976 (referred
    to as “USEPA Interim Radiochemical Methods”), referenced in
    Section 611.720. See NTIS.
    “Methods for the Determination of Organic Compounds in
    Drinking Water,” December 1988, revised July 1991, EPA-600/4-
    88/039” EPA 600/4-88/039 (referred to as “USEPA Organic
    Methods”), referenced in Sections 611.645 and 611.648. (For
    65
    methods 504.1, 508.1, and 525.2 only.) See NTIS.
    “Procedures for Radiochemical Analysis of Nuclear Reactor
    Aqueous Solutions,” referenced in Section 611.720. See NTIS.
    USEPA, Office of Research and Development, National Exposure
    Research Laboratory, Microbiological & Chemical Exposure Assessment
    Research Division (accessible on-line and available by download from
    http://www.epa.gov/nerlcwww/ordmeth.htm)
    .
    USEPA Method 415.3, Revision 1.1, “Determination of Total
    Organic Carbon and Specific UV Absorbance at 254 nm in Source
    Water and Drinking Water,” February 2005, EPA 600/R–05/055
    (referred to as “USEPA NERL Method 415.3 (rev. 1.1)”),
    referenced in Section 611.381.
    USEPA, Science and Technology Branch, Criteria and Standards
    Division, Office of Drinking Water, Washington, D.C. 20460.
    “Guidance Manual for Compliance with the Filtration and
    Disinfection Requirements for Public Water Systems using Surface
    Water Sources,” October 1989, referenced in Sections 611.111 and
    611.212.
    USEPA Water Resource Center (RC-4100T), 1200 Pennsylvania Avenue,
    NW, Washington, DC 20460:
    “Charm E*Colite Presence/Absence Test for Detection and
    Identification of Coliform Bacteria and Escherichia coli in
    Drinking Water,” January 9, 1998 (referred to as “E*Colite Test”),
    referenced in Section 611.802 (also available from Charm
    Sciences, Inc.).
    “Total Coliforms and E. coli Membrane Filtration Method with m-
    ColiBlue24® Broth,” Method No. 10029, Revision 2, August 17,
    1999 (referred to as “m-ColiBlue24 Test”), referenced in Section
    611.802 (also available from The Hach Company).
    “EPA Method 1600: Enterococci in Water by Membrane
    Filtration Using Membrane-Enterococcus Indoxyl–b–D–Glucoside
    Agar (mEI),” September 2002, EPA 821/R–02/022 (referred to as
    “USEPA Method 1600”) is an approved variation of Standard
    Methods, Method 9230 C, “Fecal Streptococcus and Enterococcus
    Groups, Membrane Filter Techniques” (which has not itself been
    approved for use by USEPA) (accessible on-line and available by
    download from http://www.epa.gov/nerlcwww/1600sp02.pdf),
    66
    referenced in Section 611.802.
    “Method 1601: Male-specific (F
    +
    ) and Somatic Coliphage in
    Water by Two-step Enrichment Procedure,” April 2001, EPA
    821/R–01/030 (referred to as “USEPA Method 1601”) (accessible
    on-line and available by download from
    http://www.epa.gov/nerlcwww/1601ap01.pdf), referenced in
    Section 611.802.
    “Method 1602: Male-specific (F
    +
    ) and Somatic Coliphage in
    Water by Single Agar Layer (SAL) Procedure,” April 2001, EPA
    821/R–01/029 (referred to as “USEPA Method 1602”) (accessible
    on-line and available by download from
    http://www.epa.gov/nerlcwww/1602ap01.pdf), referenced in
    Section 611.802.
    “Method 1604: Total Coliforms and
    Escherichia coli
    in Water by
    Membrane Filtration Using a Simultaneous Detection Technique
    (MI Medium),” September 2002, EPA 821/R-02/024 (referred to
    as “USEPA Method 1604”) (accessible on-line and available by
    download from http://www.epa.gov/nerlcwww/1604sp02.pdf),
    referenced in Section 611.802.
    USGS. Books and Open-File Reports Section, United States Geological
    Survey, Federal Center, Box 25286, Denver, CO 80225-0425.
    Methods available upon request by method number from “Methods
    for Analysis by the U.S. Geological Survey National Water
    Quality Laboratory—Determination of Inorganic and Organic
    Constituents in Water and Fluvial Sediments,” Open File Report
    93-125, 1993, or Book 5, Chapter A-1, “Methods for
    Determination of Inorganic Substances in Water and Fluvial
    Sediments,” 3rd ed., Open-File Report 85-495, 1989, as
    appropriate (referred to as “USGS Methods”).
    I-1030-85, referenced in Section 611.611.
    I-1601-85, referenced in Section 611.611.
    I-1700-85, referenced in Section 611.611.
    I-2598-85, referenced in Section 611.611.
    I-2601-90, referenced in Section 611.611.
    I-2700-85, referenced in Section 611.611.
    67
    I-3300-85, referenced in Section 611.611.
    Methods available upon request by method number from “Methods
    for Determination of Radioactive Substances in Water and Fluvial
    Sediments,” Chapter A5 in Book 5 of “Techniques of Water-
    Resources Investigations of the United States Geological Survey,”
    1997.
    R-1110-76, referenced in Section 611.720.
    R-1111-76, referenced in Section 611.720.
    R-1120-76, referenced in Section 611.720.
    R-1140-76, referenced in Section 611.720.
    R-1141-76, referenced in Section 611.720.
    R-1142-76, referenced in Section 611.720.
    R-1160-76, referenced in Section 611.720.
    R-1171-76, referenced in Section 611.720.
    R-1180-76, referenced in Section 611.720.
    R-1181-76, referenced in Section 611.720.
    R-1182-76, referenced in Section 611.720.
    Waters Corporation, Technical Services Division, 34 Maple St., Milford,
    MA 01757 (800-252-4752).
    “Waters Test Method for Determination of Nitrite/Nitrate in Water
    Using Single Column Ion Chromatography,” Method B-1011,
    August 1987 (referred to as “Waters Method B-1011”), referenced
    in Section 611.611.
    c)
    The Board incorporates the following federal regulations by reference:
    40 CFR 3.2, as added at 70 Fed. Reg. 59848 (Oct. 13, 2005) (2006) (How
    Does This Part Provide for Electronic Reporting?), referenced in Section
    611.105.
    40 CFR 3.3, as added at 70 Fed. Reg. 59848 (Oct. 13, 2005)
    (2006) (What
    68
    Definitions Are Applicable to This Part?), referenced in Section 611.105.
    40 CFR 3.10, as added at 70 Fed. Reg. 59848 (Oct. 13, 2005) (2006)
    (What Are the Requirements for Electronic Reporting to EPA?),
    referenced in Section 611.105.
    40 CFR 3.2000, as added at 70 Fed. Reg. 59848 (Oct. 13, 2005) (2006)
    (What Are the Requirements Authorized State, Tribe, and Local
    Programs’ Reporting Systems Must Meet?), referenced in Section
    611.105.
    40 CFR 136.3(a) (2006), referenced in Section 611.1004.
    Appendix B to 40 CFR 136 (2005) (2006), referenced in Sections
    611.359, 611.609, and 611.646.
    d)
    This Part incorporates no later amendments or editions.
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.160
    Composite Correction Program
    a)
    The Agency may require in writing that a PWS conduct a Composite Correction
    Program (CCP). The CCP must consist of two elements: a Comprehensive
    Performance Evaluation (CPE) and a Comprehensive Technical Assistance
    (CTA).
    1)
    A CPE is a thorough review and analysis of a plant’s performance-based
    capabilities and associated administrative, operation, and maintenance
    practices. It must identify factors that may be adversely impacting a
    plant’s capability to achieve compliance and emphasize approaches that
    can be implemented without significant capital improvements.
    2)
    For purposes of compliance with Subparts R and X of this Part, the
    comprehensive performance evaluation must consist of at least the
    following components: Assessment of plant performance; evaluation of
    major unit processes; identification and prioritization of performance
    limiting factors; assessment of the applicability of comprehensive
    technical assistance; and preparation of the CPE report.
    BOARD NOTE: Subsection (a)(2) of this Section is derived from the
    third sentence of the definition of “comprehensive performance
    evaluation” in 40 CFR 141.2 (2002)
    (2006).
    3)
    A CTA is the performance improvement phase that is implemented if the
    CPE results indicate improved performance potential. During the CTA
    69
    phase, the PWS must identify and systematically address plant-specific
    factors. The CTA is a combination of utilizing CPE results as a basis for
    followup, implementing process control priority-setting techniques and
    maintaining long-term involvement to systematically train staff and
    administrators.
    b)
    A PWS must implement any followup recommendations made in writing by the
    Agency that result as part of the CCP.
    c)
    A PWS may appeal to the Board, pursuant to Section 40 of the Act [415 ILCS
    5/40], any Agency requirement that it conduct a CCP or any followup
    recommendations made in writing by the Agency that result as part of the CCP,
    except when a CPE is required under Section 611.745(b)(4).
    BOARD NOTE: Derived from 40 CFR 142.16(g) (2002) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.161
    Case-by-Case Reduced Subpart Y Monitoring for Wholesale and
    Consecutive Systems
    The Agency may, by a SEP issued pursuant to Section 611.110, reduce the monitoring
    requirements of Subpart Y of this Part as they apply to a wholesale system or a consecutive
    system, otherwise than by use of the provisions of Section 611.500 subject to the following
    limitations:
    a)
    The Agency must consider the following system-specific knowledge in making its
    determination:
    1)
    The amount and percentage of finished water provided;
    2)
    Whether finished water is provided seasonally, intermittently, or full-time;
    3)
    Improved DBP occurrence information based on IDSE results;
    4)
    Significant changes in the supplier’s raw water quality, treatment, or
    distribution system after completion of the IDSE; and
    4)
    Such other considerations as would bear on the occurrence of DBP in the
    distribution system and the ability of the reduced monitoring to detect
    DBP in the supplier’s distribution system.
    b)
    Any reduced monitoring allowed pursuant to this Section must require a
    minimum of one compliance monitoring location for each supplier.
    c)
    The supplier must report any changes in its raw water quality, treatment, or
    70
    distribution system or any other factors that come to its attention after the
    issuance of a SEP that allows reduced monitoring pursuant to this Section that
    would bear on the occurrence of DBP in the distribution system and the ability of
    the reduced monitoring to detect DBP in the supplier’s distribution system.
    d)
    The Agency may allow the reduced monitoring provided by this Section only
    after USEPA has approved the State program revisions involving Subparts W and
    Y of this Part.
    BOARD NOTE: Derived from 40 CFR 142.16(m) and the preamble discussion at 71 Fed. Reg.
    388, 430-31 (Jan. 4, 2006). USEPA stated that it will allow the State to elect to authorize
    reduced monitoring according to a procedure devised by the State. The Board borrowed from
    the special primacy requirements applicable to the Subpart Y provisions and the accompanying
    preamble discussion to derive the procedure set forth in this Section.
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    SUBPART F: MAXIMUM CONTAMINANT LEVELS (MCLs) AND
    MAXIMUM RESIDUAL DISINFECTANT LEVELS (MRDLs)
    Section 611.310
    Old State-Only Maximum Contaminant Levels (MCLs) for Organic
    Chemical Contaminants
    The following are State-only MCLs for organic chemical contaminants. The State-only MCLs
    for organic chemical contaminants in this Section apply to all CWSs. They are additional State
    requirements. Compliance with the State-only MCLs in subsections (a) and (b) is calculated
    pursuant to Subpart O of this Part.
    Contaminant
    MCL (mg/ℓ)
    Aldrin
    0.001
    DDT
    0.05
    Dieldrin
    0.001
    Heptachlor
    0.0001
    Heptachlor epoxide
    0.0001
    2,4-D
    0.01
    BOARD NOTE: Originally derived from 40 CFR 141.12 (1994)
    (1992), USEPA removed the
    last entry in subsections (a) and (b) and marked them reserved at 57 Fed. Reg. 31838 (July 17,
    1992). USEPA removed all of 40 CFR 141.12 and marked it “reserved” at 71 Fed. Reg. 388
    (Jan. 4, 2006). USEPA added another listing of organic MCLs at 40 CFR 141.61 (2002) (2006).
    Heptachlor, heptachlor epoxide, and 2,4-D appear in both this Section and in Section 611.311,
    with a different MCL in each Section. The heptachlor, heptachlor epoxide, and 2,4-D MCLs in
    this Section are Illinois limitations that are more stringent than the federal requirements.
    However, detection of these contaminants or violation of their federally-derived revised Section
    611.311 MCLs imposes more stringent monitoring, reporting, and notice requirements.
    71
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.312
    Maximum Contaminant Levels (MCLs) for Disinfection Byproducts
    (DBPs)
    a)
    Bromate and chlorite. The maximum contaminant levels (MCLs) for disinfection
    byproducts (DBPs) bromate and chlorite are as follows:
    Disinfection byproduct
    byproduct
    MCL (mg/ℓ)
    Total trihalomethanes (TTHM)
    0.080
    Haloacetic acids (five) (HAA5) 0.060
    Bromate
    0.010
    Chlorite
    1.0
    1)
    Compliance dates for CWSs and NTNCWSs. A Subpart B system
    supplier that serves 10,000 or more persons must comply with this
    subsection (a). A Subpart B system supplier that serves fewer than 10,000
    persons and systems using only groundwater not under the direct influence
    of surface water must comply with this subsection (a).
    2)
    USEPA has identified the following as the best available technology,
    treatment techniques, or other means available for achieving compliance
    with the maximum contaminant levels for bromate and chlorite identified
    in this subsection (a):
    Disinfection
    Byproduct
    Best Available Technology
    Bromate
    Control of ozone treatment process to reduce production
    of bromate.
    Chlorite
    Control of treatment processes to reduce disinfectant
    demand and control of disinfection treatment processes
    to reduce disinfectant levels.
    b)
    Compliance dates.
    1)
    CWSs and NTNCWSs. A Subpart B system supplier serving 10,000 or
    more persons must comply with this Section beginning January 1, 2002. A
    Subpart B system supplier serving fewer than 10,000 persons or a supplier
    using only groundwater not under the direct influence of surface water must
    comply with this Section beginning January 1, 2004.
    2)
    A PWS that is installing GAC or membrane technology to comply with this
    Section may apply to the Board for an extension of up to 24 months past the
    dates in subsection (b)(1) of this Section, but not beyond December 31,
    72
    2003. The Board must grant the extension, and must set a schedule for
    compliance and may specify any interim measures that the PWS must take.
    Failure to meet the schedule or interim treatment requirements constitutes a
    violation of an NPDWR.
    b)
    TTHM and HAA5.
    1)
    Subpart I—Running annual average compliance.
    A)
    Compliance dates. A Subpart B system supplier that serves 10,000
    or more persons must comply with this subsection (b)(1) beginning
    January 1, 2002. A Subpart B system supplier that serves fewer
    than 10,000 persons and systems using only groundwater not under
    the direct influence of surface water must comply with this
    subsection (b)(1). All systems must comply with these MCLs until
    the date specified for Subpart Y compliance in Section 611.980(c).
    Disinfection Byproduct
    MCL (mg/ℓ)
    Total trihalomethanes (TTHM)
    0.080
    Haloacetic acids (five) (HAA5)
    0.060
    B)
    USEPA has identified the following as the best available
    technology, treatment techniques, or other means available for
    achieving compliance with the maximum contaminant levels for
    TTHM and HAA5 identified in this subsection (b)(1):
    Disinfection Byproduct
    Best Available Technology
    Total trihalomethanes
    (TTHM) and
    Haloacetic acids (five)
    (HAA5)
    Enhanced coagulation or
    enhanced softening or
    GAC10, with chlorine as
    the primary and residual
    disinfectant.
    2)
    Subpart Y—Locational running annual average compliance.
    A)
    Compliance dates. The Subpart Y MCLs for TTHM and HAA5
    must be complied with as a locational running annual average at
    each monitoring location beginning the date specified for Subpart
    Y compliance in Section 611.980(c).
    Disinfection Byproduct
    MCL (mg/ℓ)
    Total trihalomethanes (TTHM)
    0.080
    Haloacetic acids (five) (HAA5)
    0.060
    73
    B)
    USEPA has identified the following as the best available
    technology, treatment techniques, or other means available for
    achieving compliance with the maximum contaminant levels for
    TTHM and HAA5 identified in this subsection (b)(2) for any
    supplier that disinfects its source water:
    Disinfection Byproduct
    Best Available Technology
    Total trihalomethanes
    (TTHM) and
    Haloacetic acids (five)
    (HAA5)
    Enhanced coagulation or
    enhanced softening, plus
    GAC10; or nanofiltration
    with a molecular weight
    cutoff
    ≤1000
    Daltons; or
    GAC20.
    C)
    USEPA has identified the following as the best available
    technology, treatment techniques, or other means available for
    achieving compliance with the maximum contaminant levels for
    TTHM and HAA5 identified in this subsection (b)(2) for
    consecutive systems and applies only to the disinfected water that
    a consecutive system buys or otherwise receives from a wholesale
    system:
    Disinfection Byproduct
    Best Available Technology
    Total trihalomethanes
    (TTHM) and
    Haloacetic acids (five)
    (HAA5)
    Any system that serves
    10,000 or more persons:
    Improved distribution
    system and storage tank
    management to reduce
    residence time, plus the use
    of chloramines for
    disinfectant residual
    maintenance; or
    Any system that serves
    fewer than 10,000 persons:
    Improved distribution
    system and storage tank
    management to reduce
    residence time.
    c)
    The following are identified as the best technology, treatment techniques, or other
    means available for achieving compliance with the maximum contaminant levels
    for disinfection byproducts (DBPs) identified in subsection (a) of this Section.
    74
    Disinfection byproduct
    (DBP)
    Best available technology
    (BAT)
    TTHM
    Enhanced coagulation or enhanced softening or GAC10,
    with chlorine as the primary and residual disinfectant
    HAA5
    Enhanced coagulation or enhanced softening or GAC10,
    with chlorine as the primary and residual disinfectant
    Bromate
    Control of ozone treatment process to reduce production
    of bromate
    Chlorite
    Control of treatment processes to reduce disinfectant
    demand and control of disinfection treatment processes to
    reduce disinfectant levels
    BOARD NOTE: Derived from 40 CFR 141.64 (2002) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    SUBPART I: DISINFECTANT RESIDUALS, DISINFECTION BYPRODUCTS, AND
    DISINFECTION BYPRODUCT PRECURSORS
    Section 611.381
    Analytical Requirements
    a)
    A supplier must use only the analytical methods specified in this Section or their
    equivalents as approved by the Agency to demonstrate compliance with the
    requirements of this Subpart I and with the requirements of Subparts W and Y of
    this Part.
    b)
    Disinfection byproducts (DBPs).
    1)
    A supplier must measure disinfection byproducts (DBPs) by the appropriate
    of the following methods (as modified by the footnotes) listed in the
    following table:
    Approved Methods for Disinfection Byproduct (DBP) Compliance
    Monitoring
    Methodology2
    EPA Method
    Standard
    Methods,
    19th ed.,
    Method
    Byproduct
    Measured1
    P&T/GC/ElCD &
    PID
    3502.2
    TTHM
    P&T/GC/MS
    524.2
    TTHM
    LLE/GC/ECD
    551.1
    TTHM
    LLE/GC/ECD
    6251 B
    HAA5
    SPE/GC/ECD
    552.1
    HAA5
    75
    LLE/GC/ECD
    552.2
    HAA5
    Amperometric
    Titration
    4500-ClO2 E Chlorite4
    IC
    300.0
    Chlorite4
    IC
    300.1
    Chlorite4, Bromate
    1 The listed method is approved for measuring specified disinfection
    byproduct.
    2 P&T = purge and trap; GC = gas chromatography; ElCD = electrolytic
    conductivity detector; PID = photoionization detector; MS = mass
    spectrometer; LLE = liquid/liquid extraction; ECD = electron capture
    detector; SPE = solid phase extractor; IC = ion chromatography.
    3 If TTHMs are the only analytes being measured in the sample, then a
    PID is not required.
    4 Amperometric titration may be used for routine daily monitoring of
    chlorite at the entrance to the distribution system, as prescribed in
    Section 611.382(b)(2)(A)(i). Ion chromatography must be used for
    routine monthly monitoring of chlorite and additional monitoring of
    chlorite in the distribution system, as prescribed in Sections
    611.382(b)(2)(A)(ii) and (b)(2)(B).
    A)
    TTHM:
    i)
    By purge and trap, gas chromatography, electrolytic
    conductivity detector, and photoionization detector:
    USEPA Organic Methods, Method 502.2. If TTHMs are
    the only analytes being measured in the sample, then a
    photoionization detector is not required.
    ii)
    By purge and trap, gas chromatography, mass
    spectrometer: USEPA Organic Methods, Method 524.2.
    iii)
    By liquid-liquid extraction, gas chromatography, electron
    capture detector: USEPA Organic Methods, Method 551.1.
    B)
    HAA5:
    i)
    By liquid-liquid extraction (diazomethane), gas
    chromatography, electron capture detector: Standard
    Methods, 19th or 21st ed., Method 6251 B.
    ii)
    By solid phase extractor (acidic methanol), gas
    chromatography, electron capture detector: USEPA
    76
    Organic Methods, Method 552.1.
    iii)
    By liquid-liquid extraction (acidic methanol), gas
    chromatography, electron capture detector: USEPA
    Organic Methods, Method 552.2 or 552.3.
    C)
    Bromate:
    i)
    By ion chromatography: USEPA Organic and Inorganic
    Methods, Method 300.1.
    ii)
    By ion chromatography and post-column reaction: USEPA
    OGWDW Methods, Method 317.0, rev 2.0, or 326.0, rev.
    1.0.
    iii)
    By inductively-coupled plasma/mass spectrometer:
    USEPA Organic and Inorganic Methods, Method 321.8.
    BOARD NOTE: Ion chromatography and post column reaction or
    inductively-coupled plasma/mass spectrometry must be used for
    monitoring of bromate for purposes of demonstrating eligibility of
    reduced monitoring, as prescribed in Section 611.382(b)(3)(B).
    For inductively-coupled plasma/mass spectrometry, samples must
    be preserved at the time of sampling with 50 mg ethylenediamine
    (EDA) per liter of sample, and the samples must be analyzed
    within 28 days.
    D)
    Chlorite:
    i)
    By amperometric titration: Standard Methods, 19th or 21st
    ed., Method 4500-ClO
    2
    E.
    ii)
    By spectrophotometry: USEPA OGWDW Methods,
    Method 327.0, rev. 1.1.
    iii)
    By ion chromatography: USEPA Environmental Inorganic
    Methods, Method 300.0; USEPA Organic and Inorganic
    Methods, Method 300.1; USEPA OGWDW Methods,
    Method 317.0, rev. 2.0, or 326.0, rev. 1.0; or ASTM
    Method D6581-00.
    BOARD NOTE: Amperometric titration or spectrophotometry
    may be used for routine daily monitoring of chlorite at the entrance
    to the distribution system, as prescribed in Section
    611.382(b)(2)(A)(i). Ion chromatography must be used for routine
    77
    monthly monitoring of chlorite and additional monitoring of
    chlorite in the distribution system, as prescribed in Section
    611.382(b)(2)(A)(ii) and (b)(2)(B).
    2)
    Analysis Analyses under this Section for DBPs must be conducted by
    laboratories that have received certification by USEPA or the Agency
    except as specified under subsection (b)(3) of this Section. To receive
    certification to conduct analyses for the DBP contaminants listed in Section
    Sections 611.312 and 611.381 and Subparts W and Y of this Part, the
    laboratory must carry out annual analyses of performance evaluation (PE)
    samples approved by USEPA or the Agency. In these analyses of PE
    samples, the laboratory must achieve quantitative results within the
    acceptance limit on a minimum of 80% of the analytes included in each PE
    sample. The acceptance limit is defined as the 95% confidence interval
    calculated around the mean of the PE study data between a maximum and
    minimum acceptance limit of
    ±50%
    and
    ±15%
    of the study mean. fulfill the
    requirements of subsections (b)(2)(A), (b)(2)(C), and (b)(2)(D) of this
    Section.
    A)
    The laboratory must analyze performance evaluation (PE) samples
    that are acceptable to USEPA or the Agency at least once during
    each consecutive 12-month period by each method for which the
    laboratory desires certification.
    B)
    This subsection corresponds with 40 CFR 141.131(b)(2)(ii), which
    has expired by its own terms. This statement maintains structural
    consistency with the corresponding federal rule.
    C)
    The laboratory must achieve quantitative results on the PE sample
    analyses that are within the acceptance limits set forth in
    subsections (b)(2)(C)(i) through (b)(2)(B)(xi) of this Section,
    subject to the conditions of subsections (b)(2)(C)(xii) and
    (b)(2)(C)(xiii) of this Section:
    i)
    Chloroform (a THM): ±20% of true value;
    ii)
    Bromodichloromethane (a THM): ±20% of true value;
    iii)
    Dibromochloromethane (a THM): ±20% of true value;
    iv)
    Bromoform (a THM): ±20% of true value;
    v)
    Monochloroacetic Acid (an HAA5): ±40% of true value;
    vi)
    Dichloroacetic Acid (an HAA5): ±40% of true value;
    78
    vii)
    Trichloroacetic Acid (an HAA5): ±40% of true value;
    viii)
    Monobromoacetic Acid (an HAA5): ±40% of true value;
    ix)
    Dibromoacetic Acid (an HAA5): ±40% of true value;
    x)
    Chlorite: ±30% of true value; and
    xi)
    Bromate: ±30% of true value.
    xii)
    The laboratory must meet all four of the individual THM
    acceptance limits set forth in subsections (b)(2)(B)(i)
    through (b)(2)(B)(iv) of this Section in order to
    successfully pass a PE sample for TTHM.
    xiii)
    The laboratory must meet the acceptance limits for four out
    of the five HAA5 compounds set forth in subsections
    (b)(2)(B)(v) through (b)(2)(B)(ix) of this Section in order
    to successfully pass a PE sample for HAA5.
    D)
    The laboratory must report quantitative data for concentrations at
    least as low as the minimum reporting levels (MRLs) listed in
    subsections (b)(2)(D)(i) through (b)(2)(D)(xi) of this Section,
    subject to the limitations of subsections (b)(2)(D)(xii) and
    (b)(2)(D)(xiii) of this Section, for all DBP samples analyzed for
    compliance with Sections 611.312 and 611.385 and Subparts W
    and Y of this Part:
    i)
    Chloroform (a THM): 0.0010 mg/ℓ;
    ii)
    Bromodichloromethane (a THM): 0.0010 mg/ℓ;
    iii)
    Dibromochloromethane (a THM): 0.0010 mg/ℓ;
    iv)
    Bromoform (a THM): 0.0010 mg/ℓ;
    v)
    Monochloroacetic Acid (an HAA5): 0.0020 mg/ℓ;
    vi)
    Dichloroacetic Acid (an HAA5): 0.0010 mg/ℓ;
    vii)
    Trichloroacetic Acid (an HAA5): 0.0010 mg/ℓ;
    viii)
    Monobromoacetic Acid (an HAA5): 0.0010 mg/ℓ;
    ix)
    Dibromoacetic Acid (an HAA5): 0.0010 mg/ℓ;
    79
    x)
    Chlorite: 0.020 mg/ℓ, applicable to monitoring as required
    by Section 611.382(b)(2)(A)(ii) and (b)(2)(B); and
    xi)
    Bromate: 0.0050, or 0.0010 mg/ℓ if the laboratory uses
    USEPA OGWDW Methods, Method 317.0, rev. 2.0, or
    326.0 or USEPA Organic and Inorganic Methods, Method
    321.8.
    xii)
    The calibration curve must encompass the regulatory MRL
    concentration. Data may be reported for concentrations
    lower than the regulatory MRL as long as the precision and
    accuracy criteria are met by analyzing an MRL check
    standard at the lowest reporting limit chosen by the
    laboratory. The laboratory must verify the accuracy of the
    calibration curve at the MRL concentration by analyzing an
    MRL check standard with a concentration less than or
    equal to 110% of the MRL with each batch of samples.
    The measured concentration for the MRL check standard
    must be ±50% of the expected value, if any field sample in
    the batch has a concentration less than five times the
    regulatory MRL. Method requirements to analyze higher
    concentration check standards and meet tighter acceptance
    criteria for them must be met in addition to the MRL check
    standard requirement.
    xiii)
    When adding the individual trihalomethane or haloacetic
    acid concentrations, for the compounds listed in
    subsections (b)(2)(D)(v) through (b)(2)(D)(ix) of this
    Section, to calculate the TTHM or HAA5 concentrations,
    respectively, a zero is used for any analytical result that is
    less than the MRL concentration for that DBP, unless
    otherwise specified by the Agency.
    3)
    A party approved by USEPA or the Agency must measure daily chlorite
    samples at the entrance to the distribution system.
    c)
    Disinfectant residuals.
    1)
    A supplier must measure residual disinfectant concentrations for free
    chlorine, combined chlorine (chloramines), and chlorine dioxide by the
    appropriate of the methods (as modified by the footnotes) listed in the
    following table in subsections (c)(1)(A) through (c)(1)(D) of this Section,
    subject to the provisions of subsection (c)(1)(E) of this Section:
    80
    Approved Methods for Disinfectant Residual Compliance Monitoring
    Methodology
    Standard
    Methods,
    19th ed.,
    Method
    ASTM
    Method
    Residual
    Measured1
    Amperometric
    Titration
    4500-Cl D
    D1253-86
    Free chlorine,
    Combined chlorine,
    Total chlorine
    Low Level
    Amperometric
    Titration
    4500-Cl E
    Total chlorine
    DPD Ferrous
    Titrimetric
    4500-Cl F
    Free chlorine,
    Combined chlorine,
    Total chlorine
    DPD Colorimetric 4500-Cl G
    Free chlorine,
    Combined chlorine,
    Total chlorine
    Syringaldazine
    (FACTS)
    4500-Cl H
    Free chlorine
    Iodometric
    Electrode
    4500-Cl I
    Total chlorine
    DPD
    4500-ClO2 D
    Chlorine dioxide
    Amperometric
    Method II
    4500-ClO2 E
    Chlorine dioxide
    1 The listed method is approved for measuring specified disinfectant
    residual.
    A)
    Free Chlorine:
    i)
    Amperometric titration using Standard Methods, 19th,
    20th, or 21st ed., Method 4500-Cl D, or ASTM Method
    1253-86, 1253-96, or 1253-03;
    ii)
    DPD ferrous titration using Standard Methods, 19th, 20th,
    or 21st ed., Method 4500-Cl F;
    iii)
    DPD colorimetric using Standard Methods, 19th, 20th, or
    21st ed., Method 4500-Cl G; or
    iv)
    Syringaldazine (FACTS) using Standard Methods, 19th,
    20th, or 21st ed., Method 4500-Cl H.
    B)
    Combined Chlorine:
    81
    i)
    Amperometric titration using Standard Methods, 19th,
    20th, or 21st ed., Method 4500-Cl D, or ASTM Method
    1253-86, 1253-96, or 1253-03;
    ii)
    DPD ferrous titration using Standard Methods, 19th, 20th,
    or 21st ed., Method 4500-Cl F; or
    iii)
    DPD colorimetric using Standard Methods, 19th, 20th, or
    21st ed., Method 4500-Cl G.
    C)
    Total Chlorine:
    i)
    Amperometric titration using Standard Methods, 19th,
    20th, or 21st ed., Method 4500-Cl D, or ASTM Method
    1253-86, 1253-96, or 1253-03;
    ii)
    Low-level amperometric titration using Standard Methods,
    19th, 20th, or 21st ed., Method 4500-Cl E;
    iii)
    DPD ferrous titration using Standard Methods, 19th, 20th,
    or 21st ed., Method 4500-Cl F;
    iv)
    DPD colorimetric using Standard Methods, 19th, 20th, or
    21st ed., Method 4500-Cl G; or
    v)
    Iodometric electrode using Standard Methods, 19th, 20th,
    or 21st ed., Method 4500-Cl I.
    D)
    Chlorine Dioxide:
    i)
    DPD using Standard Methods, 19th, 20th, or 21st ed.,
    Method 4500-ClO
    2
    D;
    ii)
    Amperometric Method II using Standard Methods, 19th,
    20th, or 21st ed., Method 4500-ClO
    2
    E; or
    iii)
    Lissamine Green spectrophotometric using USEPA
    OGWDW Method 327.0 (rev. 1.1).
    E)
    The methods listed are approved for measuring the specified
    disinfectant residual. The supplier may measure free chlorine or
    total chlorine for demonstrating compliance with the chlorine
    MRDL and combined chlorine, or total chlorine may be measured
    for demonstrating compliance with the chloramine MRDL.
    2)
    If approved by the Agency, a supplier may also measure residual
    82
    disinfectant concentrations for chlorine, chloramines, and chlorine dioxide
    by using DPD colorimetric test kits.
    3)
    A party approved by USEPA or the Agency must measure residual
    disinfectant concentration.
    d)
    A supplier required to analyze parameters not included in subsections (b) and (c) of
    this Section must use the methods listed below. A party approved by USEPA or the
    Agency must measure the following parameters:
    1)
    Alkalinity. All methods allowed in Section 611.611(a)(21) for measuring
    alkalinity;.
    2)
    Bromide. USEPA Method 300.0 or USEPA Method 300.1;:
    A)
    USEPA Inorganic Methods, Method 300.0;
    B)
    USEPA Organic and Inorganic Methods, Method 300.1;
    C)
    USEPA OGWDW Methods, Method 317.0 (rev. 2.0) or Method
    326.0 (rev. 1.0); or
    D)
    ASTM Method D6581-00.
    3)
    Total Organic Carbon (TOC). Standard Methods, 19th ed., Method 5310
    B (High-Temperature Combustion Method), Standard Methods, 19th ed.,
    Method 5310 C (Persulfate-Ultraviolet or Heated-Persulfate Oxidation
    Method), or Standard Methods, 19th ed., Method 5310 D (Wet-Oxidation
    Method). TOC samples may not be filtered prior to analysis. TOC
    samples must either be analyzed or must be acidified to achieve pH less
    than 2.0 by minimal addition of phosphoric or sulfuric acid as soon as
    practical after sampling, not to exceed 24 hours. Acidified TOC samples
    must be analyzed within 28 days;, by any of the methods listed in
    subsection (d)(3)(A)(i), (d)(3)(A)(ii), (d)(3)(A)(iii), or (d)(3)(B) of this
    Section, subject to the limitations of subsection (d)(3)(C) of this Section:
    A)
    Standard Methods, 19th, 20th, or 21st ed., using one of the
    following methods:
    i)
    Method 5310 B (High-Temperature Combustion Method);
    ii)
    Method 5310 C (Persulfate-Ultraviolet or
    Heated-Persulfate Oxidation Method); or
    iii)
    Method 5310 D (Wet-Oxidation Method).
    83
    B)
    USEPA NERL Method 415.3 (rev. 1.1).
    C)
    Inorganic carbon must be removed from the samples prior to
    analysis. TOC samples may not be filtered prior to analysis. TOC
    samples must be acidified at the time of sample collection to
    achieve pH less than or equal to 2 with minimal addition of the
    acid specified in the method or by the instrument manufacturer.
    Acidified TOC samples must be analyzed within 28 days.
    4)
    Specific Ultraviolet Absorbance (SUVA). SUVA is equal to the UV
    absorption at 254 nm (UV
    254
    ) (measured in m
    -1
    ) divided by the dissolved
    organic carbon (DOC) concentration (measured as mg/ℓ). In order to
    determine SUVA, it is necessary to separately measure UV
    254
    and DOC.
    When determining SUVA, a supplier must use the methods stipulated in
    subsection (d)(4)(A) of this Section to measure DOC and the method
    stipulated in subsection (d)(4)(B) of this Section to measure UV
    254
    . SUVA
    must be determined on water prior to the addition of disinfectants/oxidants
    by the supplier. DOC and UV
    254
    samples used to determine a SUVA value
    must be taken at the same time and at the same location;.
    A)
    Dissolved Organic Carbon (DOC). Standard Methods, 19th ed.,
    20th ed., or 21st ed., Method 5310 B (High-Temperature
    Combustion Method), Standard Methods, 19th ed., Method 5310 C
    (Persulfate-Ultraviolet or Heated-Persulfate Oxidation Method), or
    Standard Methods, 19th ed., Method 5310 D (Wet-Oxidation
    Method) or USEPA NERL Method 415.3 (rev. 1.1). Prior to
    analysis, DOC samples must be filtered through a the 0.45
    μm
    pore-diameter filter as soon as practical after sampling, not to exceed
    48 hours. After filtration, DOC samples must be acidified to
    achieve pH less than or equal to 2 with minimal addition of the
    acid specified in the method or by the instrument manufacturer.
    Acidified DOC samples must be analyzed within 28 days after
    sample collection. Inorganic carbon must be removed from the
    samples prior to analysis. Water passed through the filter prior to
    filtration of the sample must serve as the filtered blank. This filtered
    blank must be analyzed using procedures identical to those used for
    analysis of the samples and must meet the following standards:
    DOC less than 0.5 mg/ℓ. DOC samples must be filtered through the
    0.45
    μm
    pore-diameter filter prior to acidification. DOC samples
    must either be analyzed or must be acidified to achieve pH less than
    2.0 by minimal addition of phosphoric or sulfuric acid as soon as
    practical after sampling, not to exceed 48 hours. Acidified DOC
    samples must be analyzed within 28 days; and
    B)
    Ultraviolet Absorption at 254 nm (UV
    254
    ). Method 5910 B
    (Ultraviolet Absorption Method). UV absorption must be measured
    84
    at 253.7 nm (may be rounded off to 254 nm). Prior to analysis,
    UV
    254
    samples must be filtered through a 0.45
    μm
    pore-diameter
    filter. The pH of UV
    254
    samples may not be adjusted. Samples must
    be analyzed as soon as practical after sampling, not to exceed 48
    hours; and
    5)
    pH. All methods allowed in Section 611.611(a)(17) for measuring pH.
    6)
    Magnesium. All methods allowed in Section 611.611(a) for measuring
    magnesium.
    BOARD NOTE: Derived from 40 CFR 141.131 (2004) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.382
    Monitoring Requirements
    a)
    General requirements.
    1)
    A supplier must take all samples during normal operating conditions.
    2)
    A supplier may consider multiple wells drawing water from a single aquifer
    as one treatment plant for determining the minimum number of TTHM and
    HAA5 samples required with Agency approval.
    3)
    Failure to monitor in accordance with the monitoring plan required under
    subsection (f) of this Section is a monitoring violation.
    4)
    Where compliance is based on a running annual average of monthly or
    quarterly samples or averages and the supplier’s failure to monitor makes it
    impossible to determine compliance with MCLs or MRDLs, this failure to
    monitor will be treated as a violation for the entire period covered by the
    annual average.
    5)
    A supplier must use only data collected under the provisions of this Subpart
    I to qualify for reduced monitoring.
    b)
    Monitoring requirements for disinfection byproducts (DBPs).
    1)
    TTHMs and HAA5.
    A)
    Routine monitoring. A supplier must monitor at the following
    frequency:
    i)
    A Subpart B system supplier that serves 10,000 or more
    persons must collect four water samples per quarter per
    85
    treatment plant. At least 25 percent of all samples collected
    each quarter must be collected at locations representing
    maximum residence time. The remaining samples may be
    taken at locations representative of at least average
    residence time in the distribution system and representing
    the entire distribution system, taking into account the
    number of persons served, the different sources of water,
    and the different treatment methods.
    ii)
    A Subpart B system supplier that serves from 500 to 9,999
    persons must collect one water sample per quarter per
    treatment plant. The samples must be collected from
    locations representing maximum residence time.
    iii)
    A Subpart B system supplier that serves fewer than 500
    persons must collect one sample per year per treatment
    plant during month of warmest water temperature. The
    samples must be collected from locations representing
    maximum residence time. If the sample (or average of
    annual samples, if more than one sample is taken) exceeds
    the MCL, the supplier must increase the monitoring
    frequency to one sample per treatment plant per quarter,
    taken at a point reflecting the maximum residence time in
    the distribution system, until the supplier meets the
    standards in subsection (b)(1)(D) of this Section.
    iv)
    A supplier that uses only groundwater not under direct
    influence of surface water, which uses chemical
    disinfectant, and which serves 10,000 or more persons must
    collect one water sample per quarter per treatment plant.
    The samples must be collected from locations representing
    maximum residence time.
    v)
    A supplier that uses only groundwater not under direct
    influence of surface water, which uses chemical
    disinfectant, and which serves fewer than 10,000 persons
    must collect one sample per year per treatment plant during
    month of warmest water temperature. The samples must be
    collected from locations representing maximum residence
    time. If the sample (or average of annual samples, if more
    than one sample is taken) exceeds MCL, the supplier must
    increase monitoring to one sample per treatment plant per
    quarter, taken at a point reflecting the maximum residence
    time in the distribution system, until the supplier meets
    standards in subsection (b)(1)(D) of this Section.
    86
    BOARD NOTE: If a supplier elects to sample more frequently
    than the minimum required, at least 25 percent of all samples
    collected each quarter (including those taken in excess of the
    required frequency) must be taken at locations that represent the
    maximum residence time of the water in the distribution system.
    The remaining samples must be taken at locations representative of
    at least average residence time in the distribution system. For a
    supplier using groundwater not under the direct influence of
    surface water, multiple wells drawing water from a single aquifer
    may be considered one treatment plant for determining the
    minimum number of samples required, with Agency approval.
    B)
    A supplier may reduce monitoring, except as otherwise provided, in
    accordance with the following:
    i)
    A Subpart B system supplier that serves 10,000 or more
    persons and which has a source water annual average TOC
    level, before any treatment, of less than or equal to 4.0
    mg/ℓ may reduce monitoring if it has monitored for at least
    one year and its TTHM annual average is less than or equal
    to 0.040 mg/ℓ and HAA5 annual average is less than or
    equal to 0.030 mg/ℓ. The reduced monitoring allowed is a
    minimum of one sample per treatment plant per quarter at a
    distribution system location reflecting maximum residence
    time.
    ii)
    A Subpart B system supplier that serves from 500 to 9,999
    persons and which has a source water annual average TOC
    level, before any treatment, of less than or equal to 4.0
    mg/ℓ may reduce monitoring if it has monitored at least one
    year and its TTHM annual average is less than or equal to
    0.040 mg/ℓ and HAA5 annual average is less than or equal
    to 0.030 mg/ℓ. The reduced monitoring allowed is a
    minimum of one sample per treatment plant per year at a
    distribution system location reflecting maximum residence
    time during month of warmest water temperature.
    BOARD NOTE: Any Subpart B system supplier serving
    that serves fewer than 500 persons may not reduce its
    monitoring to less than one sample per treatment plant per
    year.
    iii)
    A supplier using only groundwater not under direct
    influence of surface water using chemical disinfectant and
    serving
    that serves 10,000 or more persons may reduce
    monitoring if it has monitored at least one year and its
    87
    TTHM annual average is less than or equal to 0.040 mg/ℓ
    and HAA5 annual average is less than or equal to 0.030
    mg/ℓ. The reduced monitoring allowed is a minimum of
    one sample per treatment plant per year at a distribution
    system location reflecting maximum residence time during
    month of warmest water temperature.
    iv)
    A supplier using only groundwater not under direct
    influence of surface water using that uses chemical
    disinfectant and serving which serves fewer than 10,000
    persons may reduce monitoring if it has monitored at least
    one year and its TTHM annual average is less than or equal
    to 0.040 mg/ℓ and HAA5 annual average is less than or
    equal to 0.030 mg/ℓ for two consecutive years or TTHM
    annual average is less than or equal to 0.020 mg/ℓ and
    HAA5 annual average is less than or equal to 0.015 mg/ℓ
    for one year. The reduced monitoring allowed is a
    minimum of one sample per treatment plant per three year
    monitoring cycle at a distribution system location reflecting
    maximum residence time during month of warmest water
    temperature, with the three-year cycle beginning on
    January 1 following the quarter in which the supplier
    qualifies for reduced monitoring.
    C)
    Monitoring requirements for source water TOC. In order to
    qualify for reduced monitoring for TTHM and HAA5 under
    subsection (b)(1)(B) of this Section, a Subpart B system supplier
    not monitoring under the provisions of subsection (d) of this
    Section must take monthly TOC samples every 30 days at a
    location prior to any treatment, beginning no later than April 1,
    2008. In addition to meeting other criteria for reduced monitoring
    in subsection (b)(1)(B) of this Section, the source water TOC
    running annual average must be
    ≤4.0
    mg/ℓ (based on the most
    recent four quarters of monitoring) on a continuing basis at each
    treatment plant to reduce or remain on reduced monitoring for
    TTHM and HAA5. Once qualified for reduced monitoring for
    TTHM and HAA5 under subsection (b)(1)(B) of this Section, a
    system may reduce source water TOC monitoring to quarterly
    TOC samples taken every 90 days at a location prior to any
    treatment.
    CD)
    A Subpart B system supplier on a reduced monitoring schedule may
    remain on that reduced schedule as long as the average of all
    samples taken in the year (for a supplier that must monitor
    quarterly) or the result of the sample (for a supplier that must
    monitor no more frequently than annually) is no more than 0.060
    88
    mg/ℓ and 0.045 mg/ℓ for TTHMs and HAA5, respectively. A
    supplier that does not meet these levels must resume monitoring at
    the frequency identified in subsection (b)(1)(A) of this Section
    (minimum monitoring frequency column) in the quarter
    immediately following the monitoring period in which the supplier
    exceeds 0.060 mg/ℓ for TTHMs or 0.045 mg/ℓ for HAA5. For a
    supplier using that uses only groundwater not under the direct
    influence of surface water and serving which serves fewer than
    10,000 persons, if either the TTHM annual average is greater than
    0.080 mg/ℓ or the HAA5 annual average is greater than 0.060
    mg/ℓ, the supplier must go to increased monitoring identified in
    subsection (b)(1)(A) of this Section (sample location column) in
    the quarter immediately following the monitoring period in which
    the supplier exceeds 0.080 mg/ℓ for TTHMs or 0.060 mg/ℓ for
    HAA5.
    D)
    A supplier on increased monitoring may return to routine
    monitoring if, after at least one year of monitoring, its TTHM
    annual average is less than or equal to 0.060 mg/ℓ and its HAA5
    annual average is less than or equal to 0.045 mg/ℓ.
    E)
    The Agency may return a supplier to routine monitoring.
    2)
    Chlorite. A CWS or NTNCWS supplier using chlorine dioxide, for
    disinfection or oxidation, must conduct monitoring for chlorite.
    A)
    Routine monitoring.
    i)
    Daily monitoring. A supplier must take daily samples at the
    entrance to the distribution system. For any daily sample
    that exceeds the chlorite MCL, the supplier must take
    additional samples in the distribution system the following
    day at the locations required by subsection (b)(2)(B) of this
    Section, in addition to the sample required at the entrance to
    the distribution system.
    ii)
    Monthly monitoring. A supplier must take a three-sample
    set each month in the distribution system. The supplier must
    take one sample at each of the following locations: near the
    first customer, at a location representative of average
    residence time, and at a location reflecting maximum
    residence time in the distribution system. Any additional
    routine sampling must be conducted in the same manner (as
    three-sample sets, at the specified locations). The supplier
    may use the results of additional monitoring conducted under
    subsection (b)(2)(B) of this Section to meet the requirement
    89
    for monitoring in this subsection (b)(2)(A)(ii).
    B)
    Additional monitoring. On each day following a routine sample
    monitoring result that exceeds the chlorite MCL at the entrance to
    the distribution system, the supplier must take three chlorite
    distribution system samples at the following locations: as close to
    the first customer as possible, in a location representative of average
    residence time, and as close to the end of the distribution system as
    possible (reflecting maximum residence time in the distribution
    system).
    C)
    Reduced monitoring.
    i)
    Chlorite monitoring at the entrance to the distribution system
    required by subsection (b)(2)(A)(i) of this Section may not
    be reduced.
    ii)
    Chlorite monitoring in the distribution system required by
    subsection (b)(2)(A)(ii) of this Section may be reduced to
    one three-sample set per quarter after one year of monitoring
    where no individual chlorite sample taken in the distribution
    system under subsection (b)(2)(A)(ii) of this Section has
    exceeded the chlorite MCL and the supplier has not been
    required to conduct monitoring under subsection (b)(2)(B) of
    this Section. The supplier may remain on the reduced
    monitoring schedule until either any of the three individual
    chlorite samples taken quarterly in the distribution system
    under subsection (b)(2)(A)(ii) of this Section exceeds the
    chlorite MCL or the supplier is required to conduct
    monitoring under subsection (b)(2)(B) of this Section, at
    which time the supplier must revert to routine monitoring.
    3)
    Bromate.
    A)
    Routine monitoring. A CWS or NTNCWS supplier using ozone, for
    disinfection or oxidation, must take one sample per month for each
    treatment plant in the system using ozone. A supplier must take
    samples monthly at the entrance to the distribution system while the
    ozonation system is operating under normal conditions.
    B)
    Reduced monitoring.
    i)
    AUntil March 31, 2009, a supplier required to analyze for
    bromate may reduce monitoring from monthly to once per
    quarter quarterly, if the supplier demonstrates that the
    average source water bromide concentration is less than 0.05
    90
    mg/ℓ based upon on representative monthly bromide
    measurements for one year. The supplier may remain on
    reduced bromate monitoring until the running annual
    average source water bromide concentration, computed
    quarterly, is equal to or greater than 0.05 mg/ℓ based upon
    on representative monthly measurements. If the running
    annual average source water bromide concentration is equal
    to or greater than 0.05 mg/ℓ, the supplier must resume
    routine monitoring required by subsection (b)(3)(A) of this
    Section in the following month.
    ii)
    Beginning April 1, 2009, a Subpart B system supplier may
    no longer use the provisions of subsection (b)(3)(B)(i) of
    this Section to qualify for reduced monitoring. A supplier
    required to analyze for bromate may reduce monitoring
    from monthly to quarterly, if the supplier’s running annual
    average bromate concentration is not greater than 0.0025
    mg/ℓ based on monthly bromate measurements under
    subsection (b)(3)(A) of this Section for the most recent four
    quarters, with samples analyzed using USEPA OGWDW
    Methods, Method 317.0 (rev. 2.0) or Method 326.0 (rev.
    1.0) or USEPA Organic and Inorganic Methods, Method
    321.8. If a supplier has qualified for reduced bromate
    monitoring under subsection (b)(3)(B)(i) of this Section,
    that supplier may remain on reduced monitoring as long as
    the running annual average of quarterly bromate samples
    not greater than 0.0025 mg/ℓ based on samples analyzed
    using USEPA OGWDW Methods, Method 317.0 (rev. 2.0)
    or Method 326.0 (rev. 1.0) or USEPA Organic and
    Inorganic Methods, Method 321.8. If the running annual
    average bromate concentration is greater than 0.0025 mg/ℓ,
    the supplier must resume routine monitoring required by
    subsection (b)(3)(A) of this Section.
    c)
    Monitoring requirements for disinfectant residuals.
    1)
    Chlorine and chloramines.
    A)
    Routine monitoring. A CWS or NTNCWS supplier that uses
    chlorine or chloramines must measure the residual disinfectant level
    in the distribution system at the same point in the distribution system
    and at the same time as total coliforms are sampled, as specified in
    Section 611.521. A Subpart B system supplier may use the results
    of residual disinfectant concentration sampling conducted under
    Section 611.532 for unfiltered systems or Section 611.533 for
    systems that filter, in lieu of taking separate samples.
    91
    B)
    Reduced monitoring. Monitoring may not be reduced.
    2)
    Chlorine dioxide.
    A)
    Routine monitoring. A CWS, an NTNCWS, or a transient non-
    CWS supplier that uses chlorine dioxide for disinfection or
    oxidation must take daily samples at the entrance to the distribution
    system. For any daily sample that exceeds the MRDL, the supplier
    must take samples in the distribution system the following day at the
    locations required by subsection (c)(2)(B) of this Section, in addition
    to the sample required at the entrance to the distribution system.
    B)
    Additional monitoring. On each day following a routine sample
    monitoring result that exceeds the MRDL, the supplier must take
    three chlorine dioxide distribution system samples. If chlorine
    dioxide or chloramines are used to maintain a disinfectant residual in
    the distribution system, or if chlorine is used to maintain a
    disinfectant residual in the distribution system and there are no
    disinfection addition points after the entrance to the distribution
    system (i.e., no booster chlorination), the supplier must take three
    samples as close to the first customer as possible, at intervals of at
    least six hours. If chlorine is used to maintain a disinfectant residual
    in the distribution system and there are one or more disinfection
    addition points after the entrance to the distribution system (i.e.,
    booster chlorination), the supplier must take one sample at each of
    the following locations: as close to the first customer as possible, in
    a location representative of average residence time, and as close to
    the end of the distribution system as possible (reflecting maximum
    residence time in the distribution system).
    C)
    Reduced monitoring. Monitoring may not be reduced.
    d)
    Monitoring requirements for disinfection byproduct (DBP) precursors.
    1)
    Routine monitoring. A Subpart B system supplier that uses conventional
    filtration treatment (as defined in Section 611.101) must monitor each
    treatment plant for TOC not past the point of combined filter effluent
    turbidity monitoring and representative of the treated water. A supplier
    required to monitor under this subsection (d)(1) must also monitor for TOC
    in the source water prior to any treatment at the same time as monitoring for
    TOC in the treated water. These samples (source water and treated water)
    are referred to as paired samples. At the same time as the source water
    sample is taken, a system must monitor for alkalinity in the source water
    prior to any treatment. A supplier must take one paired sample and one
    source water alkalinity sample per month per plant at a time representative
    92
    of normal operating conditions and influent water quality.
    2)
    Reduced monitoring. A Subpart B system supplier with an average treated
    water TOC of less than 2.0 mg/ℓ for two consecutive years, or less than 1.0
    mg/ℓ for one year, may reduce monitoring for both TOC and alkalinity to
    one paired sample and one source water alkalinity sample per plant per
    quarter. The supplier must revert to routine monitoring in the month
    following the quarter when the annual average treated water TOC greater
    than or equal to 2.0 mg/ℓ.
    e)
    Bromide. A supplier required to analyze for bromate may reduce bromate
    monitoring from monthly to once per quarter, if the supplier demonstrates that the
    average source water bromide concentration is less than 0.05 mg/ℓ based upon
    representative monthly measurements for one year. The supplier must continue
    bromide monitoring to remain on reduced bromate monitoring.
    f)
    Monitoring plans. Each supplier required to monitor under this Subpart I must
    develop and implement a monitoring plan. The supplier must maintain the plan and
    make it available for inspection by the Agency and the general public no later than
    30 days following the applicable compliance dates in Section 611.380(b). A
    Subpart B system supplier serving that serves more than 3,300 persons must submit
    a copy of the monitoring plan to the Agency no later than the date of the first report
    required under Section 611.384. After review, the Agency may require changes in
    any plan elements. The plan must include at least the following elements:
    1)
    Specific locations and schedules for collecting samples for any parameters
    included in this Subpart I;
    2)
    How the supplier will calculate compliance with MCLs, MRDLs, and
    treatment techniques; and
    3)
    If approved for monitoring as a consecutive system, or if providing water to
    a consecutive system, under the provisions of Section 611.500, the sampling
    plan must reflect the entire distribution system.
    BOARD NOTE: Derived from 40 CFR 141.132 (2003)
    (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.383
    Compliance Requirements
    a)
    General requirements.
    1)
    Where compliance is based on a running annual average of monthly or
    quarterly samples or averages and the supplier fails to monitor for TTHM,
    HAA5, or bromate, this failure to monitor will be treated as a monitoring
    93
    violation for the entire period covered by the annual average. Where
    compliance is based on a running annual average of monthly or quarterly
    samples or averages and the supplier’s failure to monitor makes it
    impossible to determine compliance with the MRDL for chlorine or
    chloramines, this failure to monitor will be treated as a monitoring violation
    for the entire period covered by the annual average.
    2)
    All samples taken and analyzed under the provisions of this Subpart I must
    be included in determining compliance, even if that number is greater than
    the minimum required.
    3)
    If, during the first year of monitoring under Section 611.382, any individual
    quarter’s average will cause the running annual average of that supplier to
    exceed the MCL for total trihalomethanes, haloacetic acids (five), or
    bromate or the MRDL for chlorine or chloramine, the supplier is out of
    compliance at the end of that quarter.
    b)
    Disinfection byproducts (DBPs).
    1)
    TTHMs and HAA5.
    A)
    For a supplier monitoring quarterly, compliance with MCLs in
    Section 611.312 must be based on a running annual arithmetic
    average, computed quarterly, of quarterly arithmetic averages of all
    samples collected by the supplier as prescribed by Section
    611.382(b)(1).
    B)
    For a supplier monitoring less frequently than quarterly, the supplier
    demonstrates MCL compliance if the average of samples taken that
    year under the provisions of Section 611.382(b)(1) does not exceed
    the MCLs in Section 611.312. If the average of these samples
    exceeds the MCL, the supplier must increase monitoring to once per
    quarter per treatment plant, and such a system is not in violation of
    the MCL until it has completed one year of quarterly monitoring,
    unless the result of fewer than four quarters of monitoring will
    cause the running annual average to exceed the MCL, in which
    case the supplier is in violation at the end of that quarter. A
    supplier required to increase to quarterly monitoring must calculate
    compliance by including the sample that triggered the increased
    monitoring plus the following three quarters of monitoring.
    C)
    If the running annual arithmetic average of quarterly averages
    covering any consecutive four-quarter period exceeds the MCL,
    the supplier is in violation of the MCL and must notify the public
    pursuant to Subpart V of this Part in addition to reporting to the
    Agency pursuant to Section 611.384.
    94
    D)
    If a PWS fails to complete four consecutive quarter’s monitoring,
    compliance with the MCL for the last four-quarter compliance
    period must be based on an average of the available data.
    2)
    Bromate. Compliance must be based on a running annual arithmetic
    average, computed quarterly, of monthly samples (or, for months in which
    the supplier takes more than one sample, the average of all samples taken
    during the month) collected by the supplier, as prescribed by Section
    611.382(b)(3). If the average of samples covering any consecutive four-
    quarter period exceeds the MCL, the supplier is in violation of the MCL and
    must notify the public pursuant to Subpart V of this Part, in addition to
    reporting to the Agency pursuant to Section 611.384. If a PWS supplier
    fails to complete 12 consecutive months’ monitoring, compliance with the
    MCL for the last four-quarter compliance period must be based on an
    average of the available data.
    3)
    Chlorite. Compliance must be based on an arithmetic average of each three
    sample set taken in the distribution system as prescribed by Section
    611.382(b)(2)(A)(ii) and Section 611.382(b)(2)(B). If the arithmetic
    average of any three sample set exceeds the MCL, the supplier is in
    violation of the MCL and must notify the public pursuant to Subpart V of
    this Part, in addition to reporting to the Agency pursuant to Section 611.384.
    c)
    Disinfectant residuals.
    1)
    Chlorine and chloramines.
    A)
    Compliance must be based on a running annual arithmetic average,
    computed quarterly, of monthly averages of all samples collected by
    the supplier under Section 611.382(c)(1). If the average of quarterly
    averages covering any consecutive four-quarter period exceeds the
    MRDL, the supplier is in violation of the MRDL and must notify the
    public pursuant to Subpart V of this Part, in addition to reporting to
    the Agency pursuant to Section 611.384.
    B)
    In cases where a supplier switches between the use of chlorine and
    chloramines for residual disinfection during the year, compliance
    must be determined by including together all monitoring results of
    both chlorine and chloramines in calculating compliance. Reports
    submitted pursuant to Section 611.384 must clearly indicate that
    residual disinfectant was analyzed for each sample.
    2)
    Chlorine dioxide.
    A)
    Acute violations. Compliance must be based on consecutive daily
    95
    samples collected by the supplier under Section 611.382(c)(2). If
    any daily sample taken at the entrance to the distribution system
    exceeds the MRDL, and on the following day one (or more) of the
    three samples taken in the distribution system exceeds the MRDL,
    the supplier is in violation of the MRDL and must take immediate
    corrective action to lower the level of chlorine dioxide below the
    MRDL and must notify the public pursuant to the procedures for
    acute health risks in Subpart V of this Part, in addition to reporting
    to the Agency pursuant to Section 611.384. Failure to take samples
    in the distribution system the day following an exceedence of the
    chlorine dioxide MRDL at the entrance to the distribution system
    will also be considered an MRDL violation and the supplier must
    notify the public of the violation in accordance with the provisions
    for acute violations under Subpart V of this Part, in addition to
    reporting to the Agency pursuant to Section 611.384.
    B)
    Nonacute violations. Compliance must be based on consecutive
    daily samples collected by the supplier under Section 611.382(c)(2).
    If any two consecutive daily samples taken at the entrance to the
    distribution system exceed the MRDL and all distribution system
    samples taken are below the MRDL, the supplier is in violation of
    the MRDL and must take corrective action to lower the level of
    chlorine dioxide below the MRDL at the point of sampling and must
    notify the public pursuant to the procedures for nonacute health risks
    in Subpart V of this Part, in addition to reporting to the Agency
    pursuant to Section 611.384. Failure to monitor at the entrance to
    the distribution system the day following an exceedence of the
    chlorine dioxide MRDL at the entrance to the distribution system is
    also an MRDL violation and the supplier must notify the public of
    the violation in accordance with the provisions for nonacute
    violations under Subpart V of this Part, in addition to reporting to
    the Agency pursuant to Section 611.384.
    d)
    Disinfection byproduct (DBP) precursors. Compliance must be determined as
    specified by Section 611.385(c). A supplier may begin monitoring to determine
    whether Step 1 TOC removals can be met 12 months prior to the compliance date
    for the supplier. This monitoring is not required and failure to monitor during this
    period is not a violation. However, any supplier that does not monitor during this
    period, and then determines in the first 12 months after the compliance date that it is
    not able to meet the Step 1 requirements in Section 611.141(b)(2) and must
    therefore apply for alternate minimum TOC removal (Step 2) requirements, is not
    eligible for retroactive approval of alternate minimum TOC removal (Step 2)
    requirements as allowed pursuant to Section 611.385(b)(3) and is in violation of an
    NPDWR. A supplier may apply for alternate minimum TOC removal (Step 2)
    requirements any time after the compliance date. For a supplier required to meet
    Step 1 TOC removals, if the value calculated under Section 611.385(c)(1)(D) is
    96
    less than 1.00, the supplier is in violation of the treatment technique requirements
    and must notify the public pursuant to Subpart V of this Part, in addition to
    reporting to the Agency pursuant to Section 611.384 Subpart V of this Part.
    BOARD NOTE: Derived from 40 CFR 141.133 (2003) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.385
    Treatment Technique for Control of Disinfection Byproduct (DBP)
    Precursors
    a)
    Applicability.
    1)
    A Subpart B system supplier using conventional filtration treatment (as
    defined in Section 611.101) must operate with enhanced coagulation or
    enhanced softening to achieve the TOC percent removal levels specified in
    subsection (b) of this Section unless the supplier meets at least one of the
    alternative compliance standards listed in subsection (a)(2) or (a)(3) of this
    Section.
    2)
    Alternative compliance standards for enhanced coagulation and enhanced
    softening systems. A Subpart B system supplier using conventional
    filtration treatment may use the alternative compliance standards in
    subsections (a)(2)(A) through (a)(2)(F) of this Section to comply with this
    Section in lieu of complying with subsection (b). A supplier must comply
    with monitoring requirements in Section 611.382(d) of this Part.
    A)
    The supplier’s source water TOC level, measured according to
    Section 611.381(d)(3), is less than 2.0 mg/ℓ, calculated quarterly as
    a running annual average.
    B)
    The supplier’s treated water TOC level, measured according to
    Section 611.381(d)(3), is less than 2.0 mg/ℓ, calculated quarterly as
    a running annual average.
    C)
    The supplier’s source water TOC level, measured according to
    Section 611.381(d)(3), is less than 4.0 mg/ℓ, calculated quarterly as
    a running annual average; the source water alkalinity, measured
    according to Section 611.381(d)(1), is greater than 60 mg/ℓ (as
    CaCO
    3
    ), calculated quarterly as a running annual average; and either
    the TTHM and HAA5 running annual averages are no greater than
    0.040 mg/ℓ and 0.030 mg/ℓ, respectively; or prior to the effective
    date for compliance in Section 611.380(b), the system has made a
    clear and irrevocable financial commitment, not later than the
    effective date for compliance in Section 611.380(b), to use
    technologies that will limit the levels of TTHMs and HAA5 to no
    97
    more than 0.040 mg/ℓ and 0.030 mg/ℓ, respectively. A supplier
    must submit evidence of a clear and irrevocable financial
    commitment, in addition to a schedule containing milestones and
    periodic progress reports for installation and operation of
    appropriate technologies, to the Agency for approval not later than
    the effective date for compliance in Section 611.380(b). These
    technologies must be installed and operating not later than June 30,
    2005. Failure to install and operate these technologies by the date in
    the approved schedule will constitute a violation of an NPDWR.
    D)
    The TTHM and HAA5 running annual averages are no greater than
    0.040 mg/ℓ and 0.030 mg/ℓ, respectively, and the supplier uses only
    chlorine for primary disinfection and maintenance of a residual in
    the distribution system.
    E)
    The supplier’s source water SUVA, prior to any treatment and
    measured monthly according to Section 611.381(d)(4), is less than
    or equal to 2.0
    ℓ/mg-m
    , calculated quarterly as a running annual
    average.
    F)
    The supplier’s finished water SUVA, measured monthly according
    to Section 611.381(d)(4), is less than or equal to 2.0
    ℓ/mg-m
    ,
    calculated quarterly as a running annual average.
    3)
    Additional alternative compliance standards for softening systems. A
    supplier practicing enhanced softening that cannot achieve the TOC
    removals required by subsection (b)(2) of this Section may use the
    alternative compliance standards in subsections (a)(3)(A) and (a)(3)(B) of
    this Section in lieu of complying with subsection (b) of this Section. A
    supplier must comply with monitoring requirements in Section 611.382(d).
    The alternative compliance standards are as follows:
    A)
    The supplier may undertake softening that results in lowering the
    treated water alkalinity to less than 60 mg/ℓ (as CaCO
    3
    ), measured
    monthly according to Section 611.381(d)(1) and calculated quarterly
    as a running annual average; and
    B)
    The supplier may undertake softening that results in removing at
    least 10 mg/ℓ of magnesium hardness (as CaCO
    3
    ), measured
    monthly according to Section 611.381(d)(6)
    and calculated
    quarterly as an annual
    a running annual average.
    b)
    Enhanced coagulation and enhanced softening performance requirements.
    1)
    A supplier must achieve the percent reduction of TOC specified in
    subsection (b)(2) of this Section between the source water and the combined
    98
    filter effluent, unless the Agency approves a supplier’s request for alternate
    minimum TOC removal (Step 2) requirements under subsection (b)(3) of
    this Section.
    2)
    Required Step 1 TOC reductions, indicated in the following table, are based
    upon specified source water parameters measured in accordance with
    Section 611.381(d). A supplier practicing softening must meet the Step 1
    TOC reductions in the far-right column (source water alkalinity greater than
    120 mg/ℓ) for the following specified source water TOC:
    Step 1 Required Removal of TOC by Enhanced Coagulation and Enhanced
    Softening for a Subpart B System Supplier Using Conventional
    Treatment
    1,2
    Source-water
    TOC, mg/ℓ
    Source-water alkalinity, mg/ℓ as CaCO
    3
    0-60
    >60-120
    >120
    3
    >2.0-4.0
    35.0%
    25.0%
    15.0%
    >4.0-8.0
    45.0%
    35.0%
    25.0%
    >8.0
    50.0%
    40.0%
    30.0%
    1
    A supplier meeting at least one of the conditions in subsections (a)(2)(A)
    through (a)(2)(F) of this Section are not required to operate with enhanced
    coagulation.
    2
    A softening system that meets one of the alternative compliance
    standards in subsection (a)(3) of this Section is not required to operate
    with enhanced softening.
    3
    A supplier that practices softening must meet the TOC removal
    requirements in this column.
    3)
    A Subpart B conventional treatment system supplier that cannot achieve the
    Step 1 TOC removals required by subsection (b)(2) of this Section due to
    water quality parameters or operational constraints must apply to the
    Agency, within three months after failure to achieve the TOC removals
    required by subsection (b)(2) of this Section, for approval of alternative
    minimum TOC (Step 2) removal requirements submitted by the supplier. If
    the PWS cannot achieve the Step 1 TOC removal requirement due to
    water quality parameters or operational constraints, the Agency must
    approve the use of the Step 2 TOC removal requirement. If the Agency
    approves the alternative minimum TOC removal (Step 2) requirements, the
    Agency may make those requirements retroactive for the purposes of
    determining compliance. Until the Agency approves the alternative
    minimum TOC removal (Step 2) requirements, the supplier must meet the
    99
    Step 1 TOC removals contained in subsection (b)(2) of this Section.
    4)
    Alternative minimum TOC removal (Step 2) requirements. An application
    made to the Agency by an enhanced coagulation system supplier for
    approval of alternative minimum TOC removal (Step 2) requirements under
    subsection (b)(3) of this Section must include, at a minimum, results of
    bench- or pilot-scale testing conducted under subsection (b)(4)(B) of this
    Section. The submitted bench- or pilot-scale testing must be used to
    determine the alternative enhanced coagulation level.
    A)
    For the purposes of this Subpart I, “alternative enhanced coagulation
    level” is defined as coagulation at a coagulant dose and pH, as
    determined by the method described in subsections (b)(4)(A)
    through (E) of this Section, such that an incremental addition of 10
    mg/ℓ of alum (or equivalent amount of ferric salt) results in a TOC
    removal of less than or equal to 0.3 mg/ℓ. The percent removal of
    TOC at this point on the “TOC removal versus coagulant dose”
    curve is then defined as the minimum TOC removal required for the
    supplier. Once approved by the Agency, this minimum requirement
    supersedes the minimum TOC removal required by the table in
    subsection (b)(2) of this Section. This requirement will be effective
    until such time as the Agency approves a new value based on the
    results of a new bench- and pilot-scale test. Failure to achieve
    alternative minimum TOC removal levels is a violation of National
    Primary Drinking Water Regulations.
    B)
    Bench- or pilot-scale testing of enhanced coagulation must be
    conducted by using representative water samples and adding 10
    mg/ℓ increments of alum (or equivalent amounts of ferric salt) until
    the pH is reduced to a level less than or equal to the enhanced
    coagulation Step 2 target pH shown in the following table:
    Enhanced Coagulation Step 2 Target pH
    Alkalinity (mg/ℓ as CaCO
    3
    )
    Target pH
    0-60
    5.5
    >60-120
    6.3
    >120-240
    7.0
    >240
    7.5
    C)
    For waters with alkalinities of less than 60 mg/ℓ for which addition
    of small amounts of alum or equivalent addition of iron coagulant
    drives the pH below 5.5 before significant TOC removal occurs, the
    supplier must add necessary chemicals to maintain the pH between
    5.3 and 5.7 in samples until the TOC removal of 0.3 mg/ℓ per 10
    100
    mg/ℓ alum added (or equivalent addition of iron coagulant) is
    reached.
    D)
    The supplier may operate at any coagulant dose or pH necessary
    (consistent with other NPDWRs) to achieve the minimum TOC
    percent removal approved under subsection (b)(3) of this Section.
    E)
    If the TOC removal is consistently less than 0.3 mg/ℓ of TOC per 10
    mg/ℓ of incremental alum dose at all dosages of alum (or equivalent
    addition of iron coagulant), the water is deemed to contain TOC not
    amenable to enhanced coagulation. The supplier may then apply to
    the Agency for a waiver of enhanced coagulation requirements. If
    the TOC removal is consistently less than 0.3 mg/ℓ of TOC per 10
    mg/ℓ of incremental alum dose at all dosages of alum (or
    equivalent addition of iron coagulant), the Agency must grant the
    waiver of enhanced coagulation requirements.
    c)
    Compliance calculations.
    1)
    A Subpart B system supplier other than those identified in subsection (a)(2)
    or (a)(3) of this Section must comply with requirements contained in
    subsection (b)(2) or (b)(3) of this Section. A supplier must calculate
    compliance quarterly, beginning after the supplier has collected 12 months
    of data, by determining an annual average using the following method:
    A)
    Determine actual monthly TOC percent removal, equal to the
    following:
    100
    source water TOC
    1
    treated water TOC
    ⎟⎟×
    ⎠
    ⎞
    ⎜⎜
    ⎝
    ⎛
    ⎟
    ⎠
    ⎞
    ⎜
    ⎝
    ⎛
    −
    B)
    Determine the required monthly TOC percent removal.
    C)
    Divide the value in subsection (c)(1)(A) of this Section by the value
    in subsection (c)(1)(B) of this Section.
    D)
    Add together the results of subsection (c)(1)(C) of this Section for
    the last 12 months and divide by 12.
    E)
    If the value calculated in subsection (c)(1)(D) of this Section is less
    than 1.00, the supplier is not in compliance with the TOC percent
    removal requirements.
    2)
    A supplier may use the provisions in subsections (c)(2)(A) through
    (c)(2)(E) of this Section in lieu of the calculations in subsection (c)(1)(A)
    101
    through (c)(1)(E) of this Section to determine compliance with TOC percent
    removal requirements.
    A)
    In any month that the supplier’s treated or source water TOC level,
    measured according to Section 611.381(d)(3), is less than 2.0 mg/ℓ,
    the supplier may assign a monthly value of 1.0 (in lieu of the value
    calculated in subsection (c)(1)(C) of this Section) when calculating
    compliance under the provisions of subsection (c)(1) of this Section.
    B)
    In any month that a system practicing softening removes at least 10
    mg/ℓ of magnesium hardness (as CaCO
    3
    ), the supplier may assign a
    monthly value of 1.0 (in lieu of the value calculated in subsection
    (c)(1)(C) of this Section) when calculating compliance under the
    provisions of subsection (c)(1) of this Section.
    C)
    In any month that the system’s source water SUVA, prior to any
    treatment and measured according to Section 611.381(d)(4), is less
    than or equal to 2.0
    ℓ/mg-m
    , the supplier may assign a monthly
    value of 1.0 (in lieu of the value calculated in subsection (c)(1)(C) of
    this Section) when calculating compliance under the provisions of
    subsection (c)(1) of this Section.
    D)
    In any month that the system’s finished water SUVA, measured
    according to Section 611.381(d)(4), is less than or equal to 2.0
    ℓ/mg-m
    , the supplier may assign a monthly value of 1.0 (in lieu of
    the value calculated in subsection (c)(1)(C) of this Section) when
    calculating compliance under the provisions of subsection (c)(1) of
    this Section.
    E)
    In any month that a system practicing enhanced softening lowers
    alkalinity below 60 mg/ℓ (as CaCO
    3
    ), the supplier may assign a
    monthly value of 1.0 (in lieu of the value calculated in subsection
    (c)(1)(C) of this Section) when calculating compliance under the
    provisions of subsection (c)(1) of this Section.
    3)
    A Subpart B system supplier using conventional treatment may also comply
    with the requirements of this Section by meeting the standards in subsection
    (a)(2) or (a)(3) of this Section.
    d)
    Treatment technique requirements for disinfection byproduct (DBP) precursors.
    Treatment techniques to control the level of disinfection byproduct (DBP)
    precursors in drinking water treatment and distribution systems, for a Subpart B
    system supplier using conventional treatment, are enhanced coagulation or
    enhanced softening.
    BOARD NOTE: Derived from 40 CFR 141.135 (2002) (2006).
    102
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    SUBPART K: GENERAL MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section 611.490
    Certified Laboratories
    a)
    For the purpose of determining compliance with Subparts L G, K through O, Q
    and S of this Part, samples will be considered only if they have been analyzed as
    follows:
    1)
    By a laboratory certified pursuant to Section 4(o) of the Act [415 ILCS
    5/4(o)];
    2)
    By a laboratory certified by USEPA; or
    3)
    For measurements for of alkalinity, calcium, conductivity, disinfectant
    residual, orthophosphate, silica, turbidity, free chlorine residual,
    temperature, and pH, may be performed by a person under the supervision
    of a certified operator (35 Ill. Adm. Code 603.103).
    b)
    Nothing in this Part must be construed to preclude the Agency or any duly
    designated representative of the Agency from taking samples or from using the
    results from such samples to determine compliance by a supplier of water with the
    applicable requirements of this Part.
    BOARD NOTE: Subsections (a) and (b) are derived from 40 CFR 141.28 (2002).
    c)
    The CWS supplier must have required analyses performed either at an Agency
    laboratory or a certified laboratory. The Agency may require that some or all of
    the required samples be submitted to its laboratories.
    BOARD NOTE: This is an additional State requirement.
    BOARD NOTE: Subsections (a) and (b) are derived from 40 CFR 141.28 (2006), as amended at
    71 Fed. Reg. 65574 (Nov. 8, 2006). Subsection (c) is an additional State requirement.
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    SUBPART L: MICROBIOLOGICAL MONITORING AND ANALYTICAL
    REQUIREMENTS
    Section 611.524
    Sanitary Surveys
    a)
    Requirement to conduct a sanitary survey.
    103
    1)
    Suppliers that do not collect five or more routine samples per month must
    undergo a sanitary survey at least once every five years, except that non-
    CWS suppliers using only disinfected groundwater, from a source that is
    not under the direct influence of surface water, must undergo a sanitary
    survey at least once every ten years. The Agency or, for a non-CWS,
    Public Health must review the results of each sanitary survey to determine
    whether the existing monitoring frequency is adequate and what additional
    measures, if any, the supplier needs to undertake to improve drinking
    water quality.
    2)
    In conducting a sanitary survey of a PWS using groundwater, information
    on sources of contamination within the delineated wellhead protection
    area that was collected in the course of developing and implementing the
    wellhead protection program should be considered instead of collecting
    new information, if the information was collected since the last time the
    PWS was subject to a sanitary survey.
    b)
    Sanitary surveys must be performed by the Agency. The PWS is responsible for
    ensuring that the survey takes place.
    c)
    A sanitary survey conducted by the Agency for the purposes of Subpart S of this
    Part may be used to meet the sanitary survey requirements of this Section.
    BOARD NOTE: Derived from 40 CFR 141.21(d) (2002) (2006), as amended at 71 Fed. Reg.
    65574 (Nov. 8, 2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    SUBPART P: THM MONITORING AND ANALYTICAL REQUIREMENTS
    Section 611.680
    Sampling, Analytical, and other Requirements
    a)
    Required monitoring.
    1)
    A CWS supplier that serves a population of 10,000 or more individuals
    and which adds a disinfectant (oxidant) to the water in any part of the
    drinking water treatment process must analyze for TTHMs in accordance
    with this Subpart P.
    2)
    For the purpose of this Subpart P, the minimum number of samples
    required to be taken by the supplier must be based on the number of
    treatment plants used by the supplier. However, the Agency shall, by a
    SEP issued pursuant to Section 611.110, provide that multiple wells
    drawing raw water from a single aquifer be considered one treatment plant
    for determining the minimum number of samples.
    104
    3)
    All samples taken within an established frequency must be collected
    within a 24-hour period.
    b)
    A CWS supplier serving that serves 10,000 or more individuals.
    1)
    For a CWS supplier utilizing surface a water source in whole or in part,
    and for a CWS supplier utilizing only a groundwater source, except as
    provided in Section 611.683, analyses for TTHMs must be performed at
    quarterly intervals on at least four water samples for each treatment plant
    used by the system. At least 25 percent of the samples must be taken at
    locations within the distribution system reflecting the maximum residence
    time (MRT) of the water in the system. The remaining 75 percent must be
    taken at representative locations in the distribution system, taking into
    account the number of persons served, different sources of water and
    different treatment methods employed. The results of all analyses per
    quarter must be arithmetically averaged and reported to the Agency within
    30 days after the supplier’s receipt of such results. All samples collected
    must be used in the computation of the average, unless the analytical
    results are invalidated for technical reasons. Sampling and analyses must
    be conducted in accordance with the methods listed in Section 611.685.
    2)
    Upon application by a CWS supplier, the Agency must, by a SEP issued
    pursuant to Section 611.110, reduce the monitoring frequency required by
    subsection (b)(1) to a minimum of one sample analyzed for TTHMs per
    quarter taken at a point in the distribution system reflecting the MRT of
    the water in the system, if the Agency determines that the data from at
    least one year of monitoring in accordance with subsection (b)(1) and
    local conditions demonstrate that TTHM concentrations will be
    consistently below the MCL.
    3)
    If at any time during which the reduced monitoring frequency prescribed
    under this subsection (b) applies, the results from any analysis exceed 0.10
    mg/ℓ TTHMs and such results are confirmed by at least one check sample
    taken promptly after such results are received, or if the CWS supplier
    makes any significant change to its source of water or treatment program,
    the supplier must immediately begin monitoring in accordance with the
    requirements of subsection (b)(1), which monitoring must continue for at
    least 1 year before the frequency may be reduced again. The Agency
    must, by a SEP issued pursuant to Section 611.110, require monitoring in
    excess of the minimum frequency where it is necessary to detect variations
    of TTHM levels within the distribution system.
    BOARD NOTE: Subsections (a) and (b) of this Section are derived from 40 CFR
    141.30(a) and (b) (2002), modified to remove the limitation regarding addition of
    disinfectant.
    105
    c)
    Surface water sources for a CWS supplier serving that serves fewer than 10,000
    individuals. Suppliers must have submitted at least one initial sample per
    treatment plant for analysis or analytical results from a certified laboratory for
    MRT concentration taken between May 1, 1990, and October 31, 1990. After
    written request by the supplier and the determination by the Agency that the
    results of the sample indicate that the CWS supplier is not likely to exceed the
    MCL, the CWS must continue to submit one annual sample per treatment plant
    for analysis or analytical results from a certified laboratory to the Agency taken
    between May 1 and October 31 of succeeding years. If the sample exceeds the
    MCL, the CWS must submit to the Agency samples in accordance with the
    sampling frequency specified in subsection (b) of this Section.
    BOARD NOTE: This is an additional State requirement.
    d)
    Groundwater sources for a CWS supplier serving that serves fewer than 10,000
    individuals. Suppliers are not required to submit samples for THM analysis under
    this Subpart P.
    BOARD NOTE: This is an additional State requirement.
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.685
    Analytical Methods (Repealed)
    Sampling and analyses made pursuant to this Subpart V must be conducted by one of the total
    trihalomethanes (TTHM) methods, as directed in Section 611.645; in USEPA Technical Notes,
    incorporated by reference in Section 611.102; or in Section 611.381(b). Samples for TTHM
    must be dechlorinated upon collection to prevent further production of trihalomethanes
    according to the procedures described in the methods, except acidification is not required if only
    THMs or TTHMs are to be determined. Samples for maximum TTHM potential must not be
    dechlorinated or acidified, and should be held for seven days at 25° C (or above) prior to
    analysis.
    BOARD NOTE: Derived from 40 CFR 141.30(e) (2002).
    (Source: Repealed at 31 Ill. Reg. ________, effective ______________________)
    SUBPART S: GROUNDWATER RULE
    Section 611.800
    General Requirements and Applicability
    a)
    Scope of this Subpart S. The requirements of this Subpart S constitute NPDWRs.
    b)
    Applicability. This Subpart S applies to all PWS suppliers that use groundwater,
    except that it does not apply to public water systems that combine all of their
    106
    groundwater with surface water or with groundwater under the direct influence of
    surface water prior to treatment pursuant to Subpart B. For the purposes of this
    Subpart S, “GWS” is defined as any PWS that meets this applicability statement,
    including a consecutive system receiving finished groundwater.
    c)
    General requirements. A supplier subject to this Subpart S must comply with the
    following requirements:
    1)
    Sanitary survey information requirements for all GWS suppliers, as
    described in Section 611.801.
    2)
    Microbial source water monitoring requirements for GWS suppliers that
    do not treat all of their groundwater to at least 99.99 percent (4-log)
    treatment of viruses (using inactivation, removal, or an Agency-approved
    combination of 4-log virus inactivation and removal) before or at the first
    customer, as described in Section 611.802.
    3)
    Treatment technique requirements, described in Section 611.803, that
    apply to GWS suppliers that have fecally contaminated source waters, as
    determined by source water monitoring conducted pursuant to Section
    611.802, or which have significant deficiencies that are identified by the
    Agency, by a SEP issued pursuant to Section 611.110, or which are
    identified by USEPA pursuant to SDWA section 1445 (42 USC 300j-4).
    A GWS supplier with fecally contaminated source water or with
    significant deficiencies subject to the treatment technique requirements of
    this Subpart S must implement one or more of the following corrective
    action options: correct all significant deficiencies; provide an alternate
    source of water; eliminate the source of contamination; or provide
    treatment that reliably achieves at least 4-log treatment of viruses (using
    inactivation, removal, or an Agency-approved combination of 4-log virus
    inactivation and removal) before or at the first customer.
    4)
    A GWS supplier that provides at least 4-log treatment of viruses (using
    inactivation, removal, or an Agency-approved combination of 4-log virus
    inactivation and removal) before or at the first customer is required to
    conduct compliance monitoring to demonstrate treatment effectiveness, as
    described in Section 611.803(b).
    5)
    If requested by the Agency, a GWS supplier must provide the Agency
    with any existing information that will enable the Agency to perform a
    hydrogeologic sensitivity assessment.
    BOARD NOTE: The Board moved the definition of “hydrogeologic
    sensitivity assessment” to the definitions provision of this Part: Section
    611.101.
    107
    d)
    Compliance date. A GWS supplier must comply, unless otherwise noted, with the
    requirements of this Subpart S beginning December 1, 2009.
    BOARD NOTE: Derived from 40 CFR 141.400, as added at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.801
    Sanitary Surveys for GWS Suppliers
    a)
    A GWS supplier must provide the Agency, at the Agency’s request, any existing
    information that will enable the Agency to conduct a sanitary survey.
    b)
    For the purposes of this Subpart S, a “sanitary survey,” as conducted by the
    Agency, includes but is not limited to, an onsite review of the delineated WHPAs
    (identifying sources of contamination within the WHPAs and evaluations or the
    hydrogeologic sensitivity of the delineated WHPAs conducted under source water
    assessments or utilizing other relevant information where available), facilities,
    equipment, operation, maintenance, and monitoring compliance of a public water
    system to evaluate the adequacy of the system, its sources and operations and the
    distribution of safe drinking water.
    c)
    The sanitary survey must include an evaluation of the applicable components
    listed in subsections (c)(1) through (c)(8) of this Section:
    1)
    Source,
    2)
    Treatment,
    3)
    Distribution system,
    4)
    Finished water storage,
    5)
    Pumps, pump facilities, and controls,
    6)
    Monitoring, reporting, and data verification,
    7)
    System management and operation, and
    8)
    Operator compliance with Agency requirements.
    d)
    The Agency must repeat the sanitary survey as follows:
    1)
    The Agency must conduct a sanitary survey that addresses the eight
    sanitary survey components listed in subsection (c) of this Section no less
    frequently than every three years for a CWS supplier, except as provided
    in subsection (d)(3) of this Section, and every five years for a non-CWS
    108
    supplier. The Agency may conduct more frequent sanitary surveys for
    any supplier. The initial sanitary survey for each community water system
    must be conducted before December 31, 2012, unless the supplier meets
    the requirements of subsection (d)(3) of this Section. The initial sanitary
    survey for each CWS supplier that meets the requirements of subsection
    (d)(3) of this Section and for each non-CWS supplier must be conducted
    before December 31, 2014. The sanitary survey must include an
    evaluation of each of the elements set forth in subsection (c) of this
    Section, as applicable.
    2)
    The Agency may use a phased review process to meet the requirements of
    subsection (d)(1) of this Section if all the applicable elements of
    subsection (c) of this Section are evaluated within the required interval.
    3)
    The Agency may conduct sanitary surveys once every five years for
    community water systems under any of the following circumstances:
    A)
    If the system either provides at least 4-log treatment of viruses
    (using inactivation, removal, or an Agency-approved combination
    of 4-log inactivation and removal) before or at the first customer
    for all its groundwater sources; or
    B)
    If the supplier has an outstanding performance record, as
    determined by the Agency and documented in previous sanitary
    surveys, and the supplier has no history of total coliform MCL or
    monitoring violations under Sections 611.521 through 611.527
    since the last sanitary survey.
    4)
    This subsection (d)(4) corresponds with 40 CFR 142.16(o)(2)(iv), which
    imposes requirements for describing the elements of the State’s regulatory
    system. This statement maintains structural consistency with the
    corresponding federal provision.
    5)
    The Agency must provide a GWS supplier with written notice by a SEP
    issued pursuant to Section 611.110 that describes any significant
    deficiency which it has found no later than 30 days after the Agency has
    identified the significant deficiency. The notice may specify corrective
    actions and deadlines for completion of corrective actions. The Agency
    may provide the written notice at the time of the sanitary survey.
    BOARD NOTE: Subsections (a) through (c) are derived from 40 CFR 141.401, as added at 71
    Fed. Reg. 65574 (Nov. 8, 2006). Subsection (d) is derived from 40 CFR 142.16(o)(2), as added
    at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    109
    Section 611.802
    Groundwater Source Microbial Monitoring and Analytical Methods
    a)
    Triggered source water monitoring.
    1)
    General requirements. A GWS supplier must conduct triggered source
    water monitoring if the following conditions exist:
    A)
    The supplier does not provide at least 4-log treatment of viruses
    (using inactivation, removal, or an Agency-approved combination
    of 4-log virus inactivation and removal) before or at the first
    customer for each groundwater source; and
    B)
    The supplier is notified that a sample collected pursuant to Section
    611.521 is total coliform-positive, and the sample is not
    invalidated by the Agency pursuant to Section 611.523.
    2)
    Sampling requirements. A GWS supplier must collect, within 24 hours
    after notification of the total coliform-positive sample, at least one
    groundwater source sample from each groundwater source in use at the
    time the total coliform-positive sample was collected pursuant to Section
    611.521, except as provided in subsection (a)(2)(B) of this Section.
    A)
    The Agency may, by a SEP issued pursuant to Section 611.110,
    extend the 24-hour time limit on a case-by-case basis if it
    determines that the supplier cannot collect the groundwater source
    water sample within 24 hours due to circumstances beyond the
    supplier’s control. In the case of an extension, the Agency must
    specify how much time the supplier has to collect the sample.
    B)
    If approved by the Agency, a supplier with more than one
    groundwater source may meet the requirements of this subsection
    (a)(2) by sampling a representative groundwater source or sources.
    If directed by the Agency by a SEP issued pursuant to Section
    611.110, the supplier must submit for Agency approval a triggered
    source water monitoring plan that identifies one or more
    groundwater sources that are representative of each monitoring site
    in the system’s sample siting plan pursuant to Section 611.521 and
    that the system intends to use for representative sampling pursuant
    to this subsection (a).
    C)
    A GWS supplier that serves 1,000 or fewer people may use a
    repeat sample collected from a groundwater source to meet both
    the requirements of Section 611.522 and to satisfy the monitoring
    requirements of subsection (a)(2) of this Section for that
    groundwater source only if the Agency approves the use of E. coli
    as a fecal indicator for source water monitoring pursuant to this
    110
    subsection (a) by a SEP issued pursuant to Section 611.110. If the
    repeat sample collected from the groundwater source is E.coli
    positive, the system must comply with subsection (a)(3) of this
    Section.
    3)
    Additional requirements. If the Agency does not require corrective action
    pursuant to Section 611.803(a)(2) for a fecal indicator-positive source
    water sample collected pursuant to subsection (a)(2) of this Section that is
    not invalidated pursuant to subsection (d) of this Section, the system must
    collect five additional source water samples from the same source within
    24 hours after being notified of the fecal indicator-positive sample.
    4)
    Consecutive and wholesale systems.
    A)
    In addition to the other requirements of this subsection (a), a
    consecutive GWS supplier that has a total coliform-positive
    sample collected pursuant to Section 611.521 must notify the
    wholesale systems within 24 hours after being notified of the total
    coliform-positive sample.
    B)
    In addition to the other requirements of this subsection (a), a
    wholesale GWS supplier must comply with the following
    requirements:
    i)
    A wholesale GWS supplier that receives notice from a
    consecutive system it serves that a sample collected
    pursuant to Section Section 611.521 is total coliform-
    positive must, within 24 hours after being notified, collect a
    sample from its groundwater sources pursuant to subsection
    (a)(2) of this Section and analyze it for a fecal indicator
    pursuant to subsection (c) of this Section.
    ii)
    If the sample collected pursuant to subsection (a)(4)(B)(i)
    of this section is fecal indicator-positive, the wholesale
    GWS supplier must notify all consecutive systems served
    by that groundwater source of the fecal indicator source
    water positive within 24 hours of being notified of the
    groundwater source sample monitoring result and must
    meet the requirements of subsection (a)(3) of this Section.
    5)
    Exceptions to the triggered source water monitoring requirements. A
    GWS supplier is not required to comply with the source water monitoring
    requirements of subsection (a) of this Section if either of the following
    conditions exists:
    A)
    The Agency determines, and documents in writing, by a SEP
    111
    issued pursuant to Section 611.110, that the total coliform-positive
    sample collected pursuant to Section 611.521 is caused by a
    distribution system deficiency; or
    B)
    The total coliform-positive sample collected pursuant to Section
    611.521 is collected at a location that meets Agency criteria for
    distribution system conditions that will cause total coliform-
    positive samples.
    b)
    Assessment source water monitoring. If directed by the Agency by a SEP issued
    pursuant to Section 611.110, a GWS supplier must conduct assessment source
    water monitoring that meets Agency-determined requirements for such
    monitoring. A GWS supplier conducting assessment source water monitoring
    may use a triggered source water sample collected pursuant to subsection (a)(2) of
    this Section to meet the requirements of subsection (b) of this Section. Agency-
    determined assessment source water monitoring requirements may include the
    following:
    1)
    Collection of a total of 12 groundwater source samples that represent each
    month the system provides groundwater to the public;
    2)
    Collection of samples from each well, unless the system obtains written
    Agency approval to conduct monitoring at one or more wells within the
    GWS that are representative of multiple wells used by that system and
    which draw water from the same hydrogeologic setting;
    3)
    Collection of a standard sample volume of at least 100 mℓ for fecal
    indicator analysis, regardless of the fecal indicator or analytical method
    used;
    4)
    Analysis of all groundwater source samples using one of the analytical
    methods listed in subsection (c)(2) of this Section for the presence of E.
    coli, enterococci, or coliphage;
    5)
    Collection of groundwater source samples at a location prior to any
    treatment of the groundwater source unless the Agency approves a
    sampling location after treatment; and
    6)
    Collection of groundwater source samples at the well itself, unless the
    system’s configuration does not allow for sampling at the well itself and
    the Agency approves an alternate sampling location by a SEP issued
    pursuant to Section 611.110 that is representative of the water quality of
    that well.
    c)
    Analytical methods.
    112
    1)
    A GWS supplier subject to the source water monitoring requirements of
    subsection (a) of this Section must collect a standard sample volume of at
    least 100 mℓ for fecal indicator analysis, regardless of the fecal indicator
    or analytical method used.
    2)
    A GWS supplier must analyze all groundwater source samples collected
    pursuant to subsection (a) of this Section using one of the analytical
    methods listed in subsections (c)(2)(A) through (c)(2)(C) of this Section,
    subject to the limitations of subsection (c)(2)(D) of this Section, for the
    presence of E. coli, enterococci, or coliphage:
    A)
    E. coli:
    i)
    Autoanalysis Colilert System, Standard Methods, 20th ed.,
    Method 9223 B.
    ii)
    Colisure Test, Standard Methods, 20th ed., Method 9223 B.
    iii)
    Membrane Filter Method with MI Agar, USEPA Method
    1604.
    iv)
    m-ColiBlue24 Test.
    v)
    E*Colite Test.
    vi)
    EC–MUG, Standard Methods, 20th ed., Method 9221 F.
    vii)
    NA–MUG, Standard Methods, 20th ed., Method 9222 G.
    BOARD NOTE: EC–MUG (Standard Methods, Method 9221F)
    or NA–MUG (Standard Methods, Method 9222G) can be used for
    E. coli testing step, as described in Section 611.526(a) or (b) after
    use of Standard Methods, Method 9221 B, 9221 D, 9222 B, or
    9222 C.
    B)
    Enterococci:
    i)
    Multiple-Tube Technique, Standard Methods, 20th ed.,
    Method 9230 B.
    ii)
    Membrane Filter Technique, Standard Methods, 20th ed.,
    Method 9230 C, and USEPA Method 1600.
    BOARD NOTE: The holding time and temperature for
    groundwater samples are specified in subsection (c)(2)(D)
    of this Section, rather than as specified in Section 8 of
    113
    USEPA Method 1600.
    iii)
    Enterolert.
    BOARD NOTE: Medium is available through IDEXX
    Laboratories, Inc., at the address set forth in Section
    611.102(b). Preparation and use of the medium must be as
    set forth in the article that embodies the method as
    incorporated by reference in Section 611.102(b).
    C)
    Coliphage:
    i)
    Two-Step Enrichment Presence-Absence Procedure,
    USEPA Method 1601.
    ii)
    Single Agar Layer Procedure, USEPA Method 1602.
    D)
    Limitation on methods use. The time from sample collection to
    initiation of analysis may not exceed 30 hours. The GWS supplier
    is encouraged but is not required to hold samples below 10°C
    during transit.
    d)
    Invalidation of a fecal indicator-positive groundwater source sample.
    1)
    A GWS supplier may obtain Agency invalidation of a fecal indicator-
    positive groundwater source sample collected pursuant to subsection (a) of
    this Section only under either of the following conditions:
    A)
    The supplier provides the Agency with written notice from the
    laboratory that improper sample analysis occurred; or
    B)
    The Agency determines and documents in writing by a SEP issued
    pursuant to Section 611.110 that there is substantial evidence that a
    fecal indicator-positive groundwater source sample is not related to
    source water quality.
    2)
    If the Agency invalidates a fecal indicator-positive groundwater source
    sample, the GWS supplier must collect another source water sample
    pursuant to subsection (a) of this Section within 24 hours after being
    notified by the Agency of its invalidation decision, and the supplier must
    have it analyzed for the same fecal indicator using the analytical methods
    in subsection (c) of this Section. The Agency may extend the 24-hour
    time limit on a case-by-case basis if the supplier cannot collect the source
    water sample within 24 hours due to circumstances beyond its control. In
    the case of an extension, the Agency must specify how much time the
    system has to collect the sample.
    114
    e)
    Sampling location.
    1)
    Any groundwater source sample required pursuant to subsection (a) of this
    Section must be collected at a location prior to any treatment of the
    groundwater source unless the Agency approves a sampling location after
    treatment.
    2)
    If the supplier’s system configuration does not allow for sampling at the
    well itself, it may collect a sample at an Agency-approved location to meet
    the requirements of subsection (a) of this Section if the sample is
    representative of the water quality of that well.
    f)
    New sources. If directed by the Agency by a SEP issued pursuant to Section
    611.110, a GWS supplier that places a new groundwater source into service after
    November 30, 2009 must conduct assessment source water monitoring pursuant
    to subsection (b) of this Section. If directed by the SEP, the system must begin
    monitoring before the groundwater source is used to provide water to the public.
    g)
    Public Notification. A GWS supplier with a groundwater source sample collected
    pursuant to subsection (a) or (b) of this Section that is fecal indicator-positive and
    which is not invalidated pursuant to subsection (d) of this Section, including a
    consecutive system supplier served by the groundwater source, must conduct
    public notification pursuant to Section 611.902.
    h)
    Monitoring Violations. A failure to meet the requirements of subsections (a)
    through (f) of this Section is a monitoring violation that requires the GWS
    supplier to provide public notification pursuant to Section 611.904.
    BOARD NOTE: Derived from 40 CFR 141.402, as added at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.803
    Treatment Technique Requirements for GWS Suppliers
    a)
    GWS suppliers with significant deficiencies or source water fecal contamination.
    1)
    The treatment technique requirements of this Section must be met by
    GWS suppliers when a significant deficiency is identified or when a
    groundwater source sample collected pursuant to Section 611.802(a)(3) is
    fecal indicator-positive.
    2)
    If directed by the Agency by a SEP issued pursuant to Section 611.110, a
    GWS supplier with a groundwater source sample collected pursuant to
    Section 611.802(a)(2), (a)(4), or (b) that is fecal indicator-positive must
    comply with the treatment technique requirements of this Section.
    115
    3)
    When a significant deficiency is identified at a Subpart B PWS that uses
    both groundwater and surface water or groundwater under the direct
    influence of surface water, the system must comply with provisions of this
    subsection (b) except in cases where the Agency determines that the
    significant deficiency is in a portion of the distribution system that is
    served solely by surface water or groundwater under the direct influence
    of surface water.
    4)
    Unless the Agency, by a SEP issued pursuant to Section 611.110, directs
    the GWS supplier to implement a specific corrective action, the GWS
    supplier must consult with the Agency regarding the appropriate
    corrective action within 30 days after receiving written notice from the
    Agency of a significant deficiency, written notice from a laboratory that a
    groundwater source sample collected pursuant to Section 611.802(a)(3)
    was found to be fecal indicator-positive, or direction from the Agency that
    a fecal indicator-positive collected pursuant to Section 611.802(a)(2),
    (a)(4), or (b) requires corrective action. For the purposes of this Subpart
    S, significant deficiencies include, but are not limited to, defects in design,
    operation, or maintenance, or a failure or malfunction of the sources,
    treatment, storage, or distribution system that the Agency determines to be
    causing, or have potential for causing, the introduction of contamination
    into the water delivered to consumers.
    5)
    Within 120 days (or earlier if directed by the Agency) after receiving
    written notification from the Agency of a significant deficiency, written
    notice from a laboratory that a groundwater source sample collected
    pursuant to Section 611.802(a)(3) was found to be fecal indicator-positive,
    or written notice from the Agency that a fecal indicator-positive sample
    collected pursuant to Section 611.802(a)(2), (a)(4), or (b) requires
    corrective action, the GWS supplier must do either of the following:
    A)
    It must have completed corrective action in accordance with any
    applicable plan review processes adopted by the Agency or with
    any SEP issued by the Agency, if any, including Agency-specified
    interim measures; or
    B)
    It must be in compliance with an Agency-approved corrective
    action plan and schedule, subject to the following conditions:
    i)
    Any subsequent modifications to an Agency-approved
    corrective action plan and schedule must also be approved
    by the Agency; and
    ii)
    If the Agency specifies interim measures for protection of
    the public health pending Agency approval of the
    116
    corrective action plan and schedule or pending completion
    of the corrective action plan, the supplier must comply with
    those interim measures, as well as with any schedule
    specified by the Agency.
    6)
    Corrective action alternatives. A GWS supplier that meets the conditions
    of subsection (a)(1) or (a)(2) of this Section must implement one or more
    of the following corrective action alternatives:
    A)
    It must correct all significant deficiencies;
    B)
    It must provide an alternate source of water;
    C)
    It must eliminate the source of contamination; or
    D)
    It must provide treatment that reliably achieves at least 4-log
    treatment of viruses (using inactivation, removal, or an Agency-
    approved combination of 4-log virus inactivation and removal)
    before or at the first customer for the groundwater source.
    7)
    Special notice to the public of significant deficiencies or source water
    fecal contamination.
    A)
    In addition to the applicable public notification requirements of
    Section 611.902, a community GWS supplier that receives notice
    from the Agency of a significant deficiency or notification of a
    fecal indicator-positive groundwater source sample that is not
    invalidated by the Agency pursuant to Section 611.802(d) must
    inform the public served by the water system pursuant to Section
    611.883(h)(6) of the fecal indicator-positive source sample or of
    any significant deficiency that has not been corrected. The
    supplier must continue to inform the public annually until the
    significant deficiency is corrected or the fecal contamination in the
    groundwater source is determined by the Agency to be corrected
    pursuant to subsection (a)(5) of this Section.
    B)
    In addition to the applicable public notification requirements of
    Section 611.902, a non-community GWS supplier that receives
    notice from the Agency of a significant deficiency must inform the
    public served by the water system in a manner approved by the
    Agency of any significant deficiency that has not been corrected
    within 12 months after being notified by the Agency, or earlier if
    directed by the Agency. The supplier must continue to inform the
    public annually until the significant deficiency is corrected. The
    information must include the following information:
    117
    i)
    The nature of the significant deficiency and the date the
    significant deficiency was identified by the Agency;
    ii)
    The Agency-approved plan and schedule for correction of
    the significant deficiency, including interim measures,
    progress to date, and any interim measures completed; and
    iii)
    For a supplier with a large proportion of non-English
    speaking consumers, as determined by the Agency,
    information in the appropriate languages regarding the
    importance of the notice or a telephone number or address
    where consumers may contact the system to obtain a
    translated copy of the notice or assistance in the
    appropriate language.
    C)
    If directed by the Agency, a non-CWS supplier with significant
    deficiencies that have been corrected must inform its customers of
    the significant deficiencies, how the deficiencies were corrected,
    and the dates of correction pursuant to subsection (a)(7)(B) of this
    Section.
    b)
    Compliance monitoring.
    1)
    Existing groundwater sources. A GWS supplier that is not required to
    meet the source water monitoring requirements of this Subpart S for any
    groundwater source because it provides at least 4-log treatment of viruses
    (using inactivation, removal, or an Agency-approved combination of 4-log
    virus inactivation and removal) before or at the first customer for any
    groundwater source before December 1, 2009 must notify the Agency in
    writing that it provides at least 4-log treatment of viruses (using
    inactivation, removal, or an Agency-approved combination of 4-log virus
    inactivation and removal) before or at the first customer for the specified
    groundwater source and begin compliance monitoring in accordance with
    subsection (b)(3) of this Section before December 1, 2009. Notification to
    the Agency must include engineering, operational, or other information
    that the Agency requests to evaluate the submission. If the supplier
    subsequently discontinues 4-log treatment of viruses (using inactivation,
    removal, or an Agency-approved combination of 4-log virus inactivation
    and removal) before or at the first customer for a groundwater source, the
    supplier must conduct groundwater source monitoring, as required
    pursuant to Section 611.802.
    2)
    New groundwater sources. A GWS supplier that places a groundwater
    source in service after November 30, 2009, which is not required to meet
    the source water monitoring requirements of this Subpart S because the
    supplier provides at least 4-log treatment of viruses (using inactivation,
    118
    removal, or an Agency-approved combination of 4-log virus inactivation
    and removal) before or at the first customer for the groundwater source
    must comply with the requirements of subsections (b)(2)(A), (b)(2)(B) and
    (b)(2)(C) of this Section.
    A)
    The supplier must notify the Agency in writing that it provides at
    least 4-log treatment of viruses (using inactivation, removal, or an
    Agency-approved combination of 4-log virus inactivation and
    removal) before or at the first customer for the groundwater
    source. Notification to the Agency must include engineering,
    operational, or other information that the Agency requests by a
    SEP issued pursuant to Section 611.110 to evaluate the
    submission.
    B)
    The supplier must conduct compliance monitoring, as required
    pursuant to Section 611.803(b)(3), within 30 days after placing the
    source in service.
    C)
    The supplier must conduct groundwater source monitoring
    pursuant to Section 611.802 if it subsequently discontinues 4-log
    treatment of viruses (using inactivation, removal, or an Agency-
    approved combination of 4-log virus inactivation and removal)
    before or at the first customer for the groundwater source.
    3)
    Monitoring requirements. A GWS supplier subject to the requirements of
    subsection (a), (b)(1) or (b)(2) of this Section must monitor the
    effectiveness and reliability of treatment for that groundwater source
    before or at the first customer as follows:
    A)
    Chemical disinfection.
    i)
    GWS suppliers serving more than 3,300 people. A GWS
    supplier that serves more than 3,300 people must
    continuously monitor the residual disinfectant
    concentration using analytical methods specified in Section
    611.531(b) at a location approved by the Agency and must
    record the lowest residual disinfectant concentration each
    day that water from the groundwater source is served to the
    public. The GWS supplier must maintain the Agency-
    approved residual disinfectant concentration every day it
    serves water from the groundwater source to the public. If
    there is a failure in the continuous monitoring equipment,
    the GWS supplier must conduct grab sampling every four
    hours until the continuous monitoring equipment is
    returned to service. The supplier must resume continuous
    residual disinfectant monitoring within 14 days.
    119
    ii)
    GWS suppliers serving 3,300 or fewer people. A GWS
    supplier that serves 3,300 or fewer people must monitor the
    residual disinfectant concentration using analytical
    methods specified in Section 611.531(b) at a location
    approved by the Agency and record the residual
    disinfection concentration each day that water from the
    groundwater source is served to the public. The GWS
    supplier must determine and maintain the Agency-
    approved residual disinfectant concentration every day that
    it serves water from the groundwater source to the public.
    The GWS supplier must take a daily grab sample during
    the hour of peak flow or at another time specified by the
    Agency. If any daily grab sample measurement falls below
    the Agency-approved residual disinfectant concentration,
    the GWS supplier must take follow-up samples every four
    hours until the residual disinfectant concentration is
    restored to the Agency-approved level. Alternatively, a
    GWS supplier that serves 3,300 or fewer people may
    monitor continuously and meet the requirements of
    subsection (b)(3)(A)(i) of this Section.
    B)
    Membrane filtration. A GWS supplier that uses membrane
    filtration to meet the requirements of this Subpart S must monitor
    the membrane filtration process in accordance with all Agency-
    specified monitoring requirements and must operate the membrane
    filtration in accordance with all Agency-specified compliance
    requirements. A GWS supplier that uses membrane filtration is in
    compliance with the requirement to achieve at least 4-log removal
    of viruses when it fulfills the following conditions:
    i)
    The membrane has an absolute molecular weight cut-off, or
    an alternative parameter that describes the exclusion
    characteristics of the membrane, that can reliably achieve at
    least 4-log removal of viruses;
    ii)
    The membrane process is operated in accordance with
    Agency-specified compliance requirements; and
    iii)
    The integrity of the membrane is intact.
    C)
    Alternative treatment. A GWS supplier that uses an Agency-
    approved alternative treatment to meet the requirements of this
    Subpart S by providing at least 4-log treatment of viruses (using
    inactivation, removal, or an Agency-approved combination of 4-
    log virus inactivation and removal) before or at the first customer
    120
    must do both of the following:
    i)
    It must monitor the alternative treatment in accordance
    with all Agency-specified monitoring requirements; and
    ii)
    It must operate the alternative treatment in accordance with
    all operational requirements determined by the supplier that
    the Agency has approved as necessary to achieve at least 4-
    log treatment of viruses.
    c)
    Discontinuing treatment. A GWS supplier may discontinue 4-log treatment of
    viruses (using inactivation, removal, or an Agency-approved combination of 4-log
    virus inactivation and removal) before or at the first customer for a groundwater
    source if the supplier determines and documents and the Agency approves in
    writing that 4-log treatment of viruses is no longer necessary for that groundwater
    source. A system that discontinues 4-log treatment of viruses is subject to the
    source water monitoring and analytical methods requirements of Section 611.802
    of this Subpart S.
    d)
    A failure to meet the monitoring requirements of subsection (b) of this Section is
    a monitoring violation and requires the GWS supplier to provide public
    notification pursuant to Section 611.904.
    BOARD NOTE: Derived from 40 CFR 141.403, as added at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.804
    Treatment Technique Violations for GWS Suppliers
    a)
    A GWS supplier with a significant deficiency is in violation of the treatment
    technique requirement if, within 120 days (or earlier if directed by the Agency by
    a SEP issued pursuant to Section 611.110) of receiving written notice from the
    Agency of the significant deficiency, the system does not do either of the
    following:
    1)
    It does not complete corrective action in accordance with any applicable
    Agency plan review processes or other Agency guidance and direction,
    including Agency specified interim actions and measures, or
    2)
    It is not in compliance with an Agency-approved corrective action plan
    and schedule.
    b)
    Unless the Agency invalidates a fecal indicator-positive groundwater source
    sample pursuant to Section 611.802(d), a GWS supplier is in violation of the
    treatment technique requirement if, within 120 days (or earlier if directed by the
    Agency) after meeting the conditions of Section 611.803(a)(1) or (a)(2), the
    121
    supplier does not do either of the following:
    1)
    It does not complete corrective action in accordance with any applicable
    Agency plan review processes or other Agency guidance and direction,
    including Agency-specified interim measures, or
    2)
    It is not in compliance with an Agency-approved corrective action plan
    and schedule.
    c)
    A GWS supplier subject to the requirements of Section 611.803(b)(3) that fails to
    maintain at least 4-log treatment of viruses (using inactivation, removal, or an
    Agency-approved combination of 4-log virus inactivation and removal) before or
    at the first customer for a groundwater source is in violation of the treatment
    technique requirement if the failure is not corrected within four hours after
    determining the supplier is not maintaining at least 4-log treatment of viruses
    before or at the first customer.
    d)
    A GWS supplier must give public notification pursuant to Section 611.903 for the
    treatment technique violations specified in subsections (a), (b) and (c) of this
    Section.
    BOARD NOTE: Derived from 40 CFR 141.404, as added at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.805
    Reporting and Recordkeeping for GWS Suppliers
    a)
    Reporting. In addition to the requirements of Section 611.840, a GWS supplier
    regulated pursuant to this Subpart S must provide the following information to the
    Agency:
    1)
    A GWS supplier conducting compliance monitoring pursuant to Section
    611.803(b) must notify the Agency any time the supplier fails to meet any
    Agency-specified requirements including, but not limited to, minimum
    residual disinfectant concentration, membrane operating criteria or
    membrane integrity, and alternative treatment operating criteria, if
    operation in accordance with the criteria or requirements is not restored
    within four hours. The GWS supplier must notify the Agency as soon as
    possible, but in no case later than the end of the next business day.
    2)
    After completing any corrective action pursuant to Section 611.803(a), a
    GWS supplier must notify the Agency within 30 days after completion of
    the corrective action.
    3)
    If a GWS supplier subject to the requirements of Section 611.802(a) does
    not conduct source water monitoring pursuant to Section
    122
    611.802(a)(5)(B), the supplier must provide documentation to the Agency
    within 30 days of the total coliform-positive sample that it met the Agency
    criteria.
    b)
    Recordkeeping. In addition to the requirements of Section 611.860, a GWS
    supplier regulated pursuant to this Subpart S must maintain the following
    information in its records:
    1)
    Documentation of corrective actions. Documentation must be kept for a
    period of not less than ten years.
    2)
    Documentation of notice to the public as required pursuant to Section
    611.803(a)(7). Documentation must be kept for a period of not less than
    three years.
    3)
    Records of decisions pursuant to Section 611.802(a)(5)(B) and records of
    invalidation of fecal indicator-positive groundwater source samples
    pursuant to Section 611.802(d). Documentation must be kept for a period
    of not less than five years.
    4)
    For a consecutive system supplier, documentation of notification to the
    wholesale systems of total-coliform positive samples that are not
    invalidated pursuant to Section 611.523. Documentation must be kept for
    a period of not less than five years.
    5)
    For a supplier, including a wholesale system supplier, that is required to
    perform compliance monitoring pursuant to Section 611.803(b), the
    following information:
    A)
    Records of the supplier-specified, Agency-approved minimum
    disinfectant residual. Documentation must be kept for a period of
    not less than ten years;
    B)
    Records of the lowest daily residual disinfectant concentration and
    records of the date and duration of any failure to maintain the
    Agency-prescribed minimum residual disinfectant concentration
    for a period of more than four hours. Documentation must be kept
    for a period of not less than five years; and
    C)
    Records of supplier-specified, Agency-approved compliance
    requirements for membrane filtration and of parameters specified
    by the supplier for Agency-approved alternative treatment and
    records of the date and duration of any failure to meet the
    membrane operating, membrane integrity, or alternative treatment
    operating requirements for more than four hours. Documentation
    must be kept for a period of not less than five years.
    123
    BOARD NOTE: Derived from 40 CFR 141.405, as added at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    SUBPART T: REPORTING AND RECORDKEEPING
    Section 611.860
    Record Maintenance
    A supplier must retain on its premises or at a convenient location near its premises the following
    records:
    a)
    Records of bacteriological analyses and turbidity analyses made pursuant to this
    Part must be kept for not less than five years. Records of chemical analyses made
    pursuant to this Part must be kept for not less than ten years. Actual laboratory
    reports may be kept, or data may be transferred to tabular summaries, provided
    that the following information is included:
    1)
    The date, place, and time of sampling, and the name of the person who
    collected the sample;
    2)
    Identification of the sample as to whether it was a routine distribution
    system sample, check sample, raw or process water sample, or other
    special purpose sample;
    3)
    The date of analysis;
    4)
    The laboratory and person responsible for performing analysis;
    5)
    The analytical technique or method used; and
    6)
    The results of the analysis.
    b)
    Records of action taken by the supplier to correct violations of this Part must be
    kept for a period not less than three years after the last action taken with respect to
    the particular violation involved.
    c)
    Copies of any written reports, summaries, or communications relating to sanitary
    surveys of the system conducted by the supplier itself, by a private consultant, by
    USEPA, the Agency, or a unit of local government delegated pursuant to Section
    611.108, must be kept for a period not less than ten years after completion of the
    sanitary survey involved.
    d)
    Records concerning a variance or adjusted standard granted to the supplier must
    be kept for a period ending not less than five years following the expiration of
    such variance or adjusted standard.
    124
    e)
    Copies of public notices issued pursuant to Subpart V of this Part and
    certifications made to the Agency pursuant to Section 611.840 must be kept for
    three years after issuance.
    f)
    Copies of monitoring plans developed pursuant to this Part must be kept for the
    same period of not less than five years that applies to the records of analyses
    taken under the plan pursuant to subsection (a) of this Section, except as specified
    otherwise elsewhere in this Part.
    BOARD NOTE: Derived from 40 CFR 141.33 (2002) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    SUBPART U: CONSUMER CONFIDENCE REPORTS
    Section 611.881
    Purpose and Applicability
    a)
    This Subpart U establishes the minimum requirements for the content of annual
    reports that community water systems (CWSs) must deliver to their customers.
    These reports must contain information on the quality of the water delivered by the
    systems and characterize the risks (if any) from exposure to contaminants detected
    in the drinking water in an accurate and understandable manner.
    b)
    Notwithstanding the provisions of Section 611.100(d), this Subpart U only applies
    to CWSs.
    c)
    For the purpose of this Subpart U, “customers” are defined as billing units or
    service connections to which water is delivered by a CWS.
    d)
    For the purpose of this Subpart U, “detected” means the following: at or above the
    detection limit levels prescribed by Section 611.600(d) for inorganic contaminants;
    at or above the levels prescribed by Section 611.646(a) for Phase I, II, and V
    VOCs; at or above the levels prescribed by Section 611.648(r) for Phase II, IIB,
    and V SOCs at or above the levels prescribed by Section 611.381(b)(2)(D) for the
    disinfection byproducts listed in Section 611.312; and at or above the levels
    prescribed by Section 611.720(c)(3) for radioactive contaminants.
    BOARD NOTE: Derived from 40 CFR 141.151 (2002) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.883
    Content of the Reports
    a)
    Each CWS must provide to its customers an annual report that contains the
    information specified in this Section and Section 611.884.
    125
    b)
    Information on the source of the water delivered.
    1)
    Each report must identify the sources of the water delivered by the CWS by
    providing information on the following:
    A)
    The type of the water (e.g., surface water, groundwater); and
    B)
    The commonly used name (if any) and location of the body (or
    bodies) of water.
    2)
    If a source water assessment has been completed, the report must notify
    consumers of the availability of this information and the means to obtain it.
    In addition, systems are encouraged to highlight in the report significant
    sources of contamination in the source water area if they have readily
    available information. Where a system has received a source water
    assessment from the Agency, the report must include a brief summary of the
    system’s susceptibility to potential sources of contamination, using language
    provided by the Agency or written by the supplier.
    c)
    Definitions.
    1)
    Each report must include the following definitions:
    A)
    Maximum Contaminant Level Goal or MCLG: The level of a
    contaminant in drinking water below which there is no known or
    expected risk to health. MCLGs allow for a margin of safety.
    BOARD NOTE: Although an MCLG is not an NPDWR that the
    Board must include in the Illinois SDWA regulations, the use of
    this definition is mandatory where the term “MCLG” is defined.
    B)
    Maximum Contaminant Level or MCL: The highest level of a
    contaminant that is allowed in drinking water. MCLs are set as
    close to the MCLGs as feasible using the best available treatment
    technology.
    2)
    A report for a CWS operating under relief from an NPDWR issued under
    Sections
    Section 611.111, 611.112, 611.130, or 611.131 must include the
    following definition: “Variances, Adjusted Standards, and Site-specific
    Rules: State permission not to meet an MCL or a treatment technique under
    certain conditions.”
    3)
    A report that contains data on contaminants that USEPA regulates using
    any of the following terms must include the applicable definitions:
    126
    A)
    Treatment technique: A required process intended to reduce the
    level of a contaminant in drinking water.
    B)
    Action level: The concentration of a contaminant that, if exceeded,
    triggers treatment or other requirements that a water system must
    follow.
    C)
    Maximum residual disinfectant level goal or MRDLG: The level
    of a drinking water disinfectant below which there is no known or
    expected risk to health. MRDLGs do not reflect the benefits of the
    use of disinfectants to control microbial contaminants.
    BOARD NOTE: Although an MRDLG is not an NPDWR that the
    Board must include in the Illinois SDWA regulations, the use of
    this definition is mandatory where the term “MRDLG” is defined.
    D)
    Maximum residual disinfectant level or MRDL: The highest level
    of a disinfectant allowed in drinking water. There is convincing
    evidence that addition of a disinfectant is necessary for control of
    microbial contaminants.
    d)
    Information on detected contaminants.
    1)
    This subsection (d) specifies the requirements for information to be included
    in each report for contaminants subject to mandatory monitoring (except
    Cryptosporidium). It applies to the following:
    A)
    Contaminants subject to an MCL, action level, MRDL, or treatment
    technique (regulated contaminants);
    B)
    Contaminants for which monitoring is required by Section 611.510
    (unregulated contaminants); and
    C)
    Disinfection byproducts or microbial contaminants for which
    monitoring is required by Section 611.382 and Subpart L of this
    Part, except as provided under subsection (e)(1) of this Section, and
    which are detected in the finished water.
    2)
    The data relating to these contaminants must be displayed in one table or in
    several adjacent tables. Any additional monitoring results that a CWS
    chooses to include in its report must be displayed separately.
    3)
    The data must have been derived from data collected to comply with
    monitoring and analytical requirements during calendar year 1998 for the
    first report and must be derived from the data collected in subsequent
    calendar years, except that the following requirements also apply:
    127
    A)
    Where a system is allowed to monitor for regulated contaminants
    less often than once a year, the tables must include the date and
    results of the most recent sampling, and the report must include a
    brief statement indicating that the data presented in the report is
    from the most recent testing done in accordance with the regulations.
    No data older than five years need be included.
    B)
    Results of monitoring in compliance with Section 611.382 and
    Subpart L need only be included for five years from the date of last
    sample or until any of the detected contaminants becomes regulated
    and subject to routine monitoring requirements, whichever comes
    first.
    4)
    For detected regulated contaminants (listed in Appendix A of this Part), the
    tables must contain the following:
    A)
    The MCL for that contaminant expressed as a number equal to or
    greater than 1.0 (as provided in Appendix A of this Part);
    B)
    The federal Maximum Contaminant Level Goal (MCLG) for that
    contaminant expressed in the same units as the MCL;
    C)
    If there is no MCL for a detected contaminant, the table must
    indicate that there is a treatment technique, or specify the action
    level, applicable to that contaminant, and the report must include the
    definitions for treatment technique or action level, as appropriate,
    specified in subsection (c)(3) of this Section;
    D)
    For contaminants subject to an MCL, except turbidity and total
    coliforms, the highest contaminant level used to determine
    compliance with an NPDWR, and the range of detected levels, as
    follows:
    i)
    When compliance with the MCL is determined annually or
    less frequently: the highest detected level at any sampling
    point and the range of detected levels expressed in the same
    units as the MCL.
    ii)
    When compliance with the MCL is determined by
    calculating a running annual average of all samples taken at
    a sampling point monitoring location: the highest average of
    any of the sampling points
    monitoring locations and the
    range of all sampling points
    monitoring locations expressed
    in the same units as the MCL. For the MCLs for TTHM
    and HAA5 in Section 611.312(b)(2), the supplier must
    128
    include the highest locational running annual average for
    TTHM and HAA5 and the range of individual sample
    results for all monitoring locations expressed in the same
    units as the MCL. If results from more than one location
    exceed the TTHM or HAA5 MCL, the supplier must
    include the locational running annual average for each
    location whose results exceed the MCL.
    iii)
    When compliance with the MCL is determined on a system-
    wide basis by calculating a running annual average of all
    samples at all sampling points monitoring locations: the
    average and range of detection expressed in the same units as
    the MCL;. The supplier is required to include individual
    sample results for the IDSE conducted under Subpart W of
    this Part when determining the range of TTHM and HAA5
    results to be reported in the annual consumer confidence
    report for the calendar year that the IDSE samples were
    taken.
    BOARD NOTE to subsection (d)(4)(D): When rounding of results
    to determine compliance with the MCL is allowed by the
    regulations, rounding should be done prior to multiplying the results
    by the factor listed in Appendix A of this Part; derived from 40 CFR
    153 (2003) (2006).
    E)
    For turbidity the following:
    i)
    When it is reported pursuant to Section 611.560: the highest
    average monthly value.
    ii)
    When it is reported pursuant to the requirements of Section
    611.211(b): the highest monthly value. The report must
    include an explanation of the reasons for measuring
    turbidity.
    iii)
    When it is reported pursuant to Section 611.250, 611.743, or
    611.955(b): the highest single measurement and the lowest
    monthly percentage of samples meeting the turbidity limits
    specified in Section 611.250, 611.743, or 611.955(b) for the
    filtration technology being used. The report must include an
    explanation of the reasons for measuring turbidity;
    F)
    For lead and copper the following: the 90th percentile value of the
    most recent round of sampling and the number of sampling sites
    exceeding the action level;
    129
    G)
    For total coliform the following:
    i)
    The highest monthly number of positive samples for systems
    collecting fewer than 40 samples per month; or
    ii)
    The highest monthly percentage of positive samples for
    systems collecting at least 40 samples per month;
    H)
    For fecal coliform the following: the total number of positive
    samples; and
    I)
    The likely sources of detected contaminants to the best of the
    supplier’s knowledge. Specific information regarding contaminants
    may be available in sanitary surveys and source water assessments,
    and must be used when available to the supplier. If the supplier
    lacks specific information on the likely source, the report must
    include one or more of the typical sources for that contaminant listed
    in Appendix G of this Part that are most applicable to the CWS.
    5)
    If a CWS distributes water to its customers from multiple hydraulically
    independent distribution systems that are fed by different raw water sources,
    the table must contain a separate column for each service area and the report
    must identify each separate distribution system. Alternatively, a CWS may
    produce separate reports tailored to include data for each service area.
    6)
    The tables must clearly identify any data indicating violations of MCLs,
    MRDLs, or treatment techniques, and the report must contain a clear and
    readily understandable explanation of the violation including the following:
    the length of the violation, the potential adverse health effects, and actions
    taken by the CWS to address the violation. To describe the potential health
    effects, the CWS must use the relevant language of Appendix A of this Part.
    7)
    For detected unregulated contaminants for which monitoring is required
    (except Cryptosporidium), the tables must contain the average and range at
    which the contaminant was detected. The report may include a brief
    explanation of the reasons for monitoring for unregulated contaminants.
    e)
    Information on Cryptosporidium, radon, and other contaminants as follows:
    1)
    If the CWS has performed any monitoring for Cryptosporidium, including
    monitoring performed to satisfy the requirements of Subpart L of this Part,
    that indicates that Cryptosporidium may be present in the source water or
    the finished water, the report must include the following:
    A)
    A summary of the results of the monitoring; and
    130
    B)
    An explanation of the significance of the results.
    2)
    If the CWS has performed any monitoring for radon that indicates that radon
    may be present in the finished water, the report must include the following:
    A)
    The results of the monitoring; and
    B)
    An explanation of the significance of the results.
    3)
    If the CWS has performed additional monitoring that indicates the presence
    of other contaminants in the finished water, the report must include the
    following:
    A)
    The results of the monitoring; and
    B)
    An explanation of the significance of the results noting the existence
    of any health advisory or proposed regulation.
    f)
    Compliance with an NPDWR. In addition to the requirements of subsection (d)(6)
    of this Section, the report must note any violation that occurred during the year
    covered by the report of a requirement listed below, and include a clear and readily
    understandable explanation of the violation, any potential adverse health effects,
    and the steps the CWS has taken to correct the violation.
    1)
    Monitoring and reporting of compliance data.
    2)
    Filtration and disinfection prescribed by Subpart B of this Part. For CWSs
    that have failed to install adequate filtration or disinfection equipment or
    processes, or have had a failure of such equipment or processes that
    constitutes a violation, the report must include the following language as
    part of the explanation of potential adverse health effects: Inadequately
    treated water may contain disease-causing organisms. These organisms
    include bacteria, viruses, and parasites that can cause symptoms such as
    nausea, cramps, diarrhea, and associated headaches.
    3)
    Lead and copper control requirements prescribed by Subpart G of this Part.
    For systems that fail to take one or more actions prescribed by Section
    611.350(d), 611.351, 611.352, 611.353, or 611.354, the report must include
    the applicable language of Appendix A of this Part for lead, copper, or
    both.
    4)
    Treatment techniques for acrylamide and epichlorohydrin prescribed by
    Section 611.296. For systems that violate the requirements of Section
    611.296, the report must include the relevant language from Appendix A of
    this Part.
    131
    5)
    Recordkeeping of compliance data.
    6)
    Special monitoring requirements prescribed by Sections 611.510 and
    611.630.
    7)
    Violation of the terms of a variance, adjusted standard, site-specific rule, or
    administrative or judicial order.
    g)
    Variances, adjusted standards, and site-specific rules. If a system is operating under
    the terms of a variance, adjusted standard, or site-specific rule issued under Section
    611.111, 611.112, or 611.131, the report must contain the following:
    1)
    An explanation of the reasons for the variance, adjusted standard, or site-
    specific rule;
    2)
    The date on which the variance, adjusted standard, or site-specific rule was
    issued;
    3)
    A brief status report on the steps the CWS is taking to install treatment, find
    alternative sources of water, or otherwise comply with the terms and
    schedules of the variance, adjusted standard, or site-specific rule; and
    4)
    A notice of any opportunity for public input in the review, or renewal, of the
    variance, adjusted standard, or site-specific rule.
    h)
    Additional information.
    1)
    The report must contain a brief explanation regarding contaminants that may
    reasonably be expected to be found in drinking water, including bottled
    water. This explanation may include the language of subsections (h)(1)(A)
    through (h)(1)(C) of this Section or CWSs may use their own comparable
    language. The report also must include the language of subsection
    (h)(1)(D) of this Section.
    A)
    The sources of drinking water (both tap water and bottled water)
    include rivers, lakes, streams, ponds, reservoirs, springs, and wells.
    As water travels over the surface of the land or through the ground,
    it dissolves naturally-occurring minerals and, in some cases,
    radioactive material, and can pick up substances resulting from the
    presence of animals or from human activity.
    B)
    Contaminants that may be present in source water include the
    following:
    i)
    Microbial contaminants, such as viruses and bacteria, which
    may come from sewage treatment plants, septic systems,
    132
    agricultural livestock operations, and wildlife;
    ii)
    Inorganic contaminants, such as salts and metals, which can
    be naturally-occurring or result from urban stormwater
    runoff, industrial or domestic wastewater discharges, oil and
    gas production, mining, or farming;
    iii)
    Pesticides and herbicides, which may come from a variety of
    sources such as agriculture, urban stormwater runoff, and
    residential uses;
    iv)
    Organic chemical contaminants, including synthetic and
    volatile organic chemicals, which are byproducts of
    industrial processes and petroleum production, and can also
    come from gas stations, urban stormwater runoff, and septic
    systems; and
    v)
    Radioactive contaminants, which can be naturally-occurring
    or be the result of oil and gas production and mining
    activities.
    C)
    In order to ensure that tap water is safe to drink, USEPA prescribes
    regulations that limit the amount of certain contaminants in water
    provided by public water systems. United States Food and Drug
    Administration (USFDA) regulations establish limits for
    contaminants in bottled water that must provide the same protection
    for public health.
    D)
    Drinking water, including bottled water, may reasonably be
    expected to contain at least small amounts of some contaminants.
    The presence of contaminants does not necessarily indicate that
    water poses a health risk. More information about contaminants and
    potential health effects can be obtained by calling the USEPA Safe
    Drinking Water Hotline (800-426-4791).
    2)
    The report must include the telephone number of the owner, operator, or
    designee of the CWS as a source of additional information concerning the
    report.
    3)
    In communities with a large proportion of non-English speaking residents,
    as determined by the Agency, the report must contain information in the
    appropriate languages regarding the importance of the report or contain a
    telephone number or address where such residents may contact the system
    to obtain a translated copy of the report or assistance in the appropriate
    language.
    133
    4)
    The report must include information about opportunities for public
    participation in decisions that may affect the quality of the water.
    5)
    The CWS may include such additional information as it deems necessary for
    public education consistent with, and not detracting from, the purpose of the
    report.
    6)
    Suppliers required to comply with Subpart S of this Part.
    A)
    Any GWS supplier that receives written notice from the Agency of
    a significant deficiency or which receives notice from a laboratory
    of a fecal indicator-positive groundwater source sample that is not
    invalidated by the Agency pursuant to Section 611.802(d) must
    inform its customers of any significant deficiency that is
    uncorrected at the time of the next report or of any fecal indicator-
    positive groundwater source sample in the next report. The
    supplier must continue to inform the public annually until the
    Agency, by a SEP issued pursuant to Section 611.110, determines
    that particular significant deficiency is corrected or the fecal
    contamination in the groundwater source is addressed pursuant to
    Section 611.803(a). Each report must include the following
    information:
    i)
    The nature of the particular significant deficiency or the
    source of the fecal contamination (if the source is known)
    and the date the significant deficiency was identified by the
    Agency or the dates of the fecal indicator-positive
    groundwater source samples;
    ii)
    Whether or not the fecal contamination in the groundwater
    source has been addressed pursuant to Section 611.803(a)
    and the date of such action;
    iii)
    For each significant deficiency or fecal contamination in
    the groundwater source that has not been addressed
    pursuant to Section 611.803(a), the Agency-approved plan
    and schedule for correction, including interim measures,
    progress to date, and any interim measures completed; and
    iv)
    If the system receives notice of a fecal indicator-positive
    groundwater source sample that is not invalidated by the
    Agency pursuant to Section 611.802(d), the potential health
    effects using the health effects language of Appendix A of
    this Part.
    B)
    If directed by the Agency by a SEP issued pursuant to Section
    134
    611.110, a supplier with significant deficiencies that have been
    corrected before the next report is issued must inform its customers
    of the significant deficiency, how the deficiency was corrected,
    and the date of correction pursuant to subsection (h)(6)(A) of this
    Section.
    BOARD NOTE: Derived from 40 CFR 141.153 (2003) (2006), as amended at 71 Fed. Reg.
    65574 (Nov. 8, 2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    SUBPART V: PUBLIC NOTIFICATION OF DRINKING WATER
    VIOLATIONS
    Section 611.902
    Tier 1 Public Notice: Form, Manner, and Frequency of Notice
    a)
    Violations or situations that require a Tier 1 public notice. This subsection (a)
    lists the violation categories and other situations requiring a Tier 1 public notice.
    Appendix G of this Part identifies the tier assignment for each specific violation
    or situation.
    1)
    Violation of the MCL for total coliforms when fecal coliform or E. coli
    are present in the water distribution system (as specified in Section
    611.325(b)), or when the water supplier fails to test for fecal coliforms or
    E. coli when any repeat sample tests positive for coliform (as specified in
    Section 611.525);.
    2)
    Violation of the MCL for nitrate, nitrite, or total nitrate and nitrite, as
    defined in Section 611.301, or when the water supplier fails to take a
    confirmation sample within 24 hours after the supplier’s receipt of the
    results from the first sample showing an exceedence of the nitrate or
    nitrite MCL, as specified in Section 611.606(b);
    .
    3)
    Exceedence of the nitrate MCL by a non-CWS supplier, where permitted
    to exceed the MCL by the Agency under Section 611.300(d), as required
    under Section 611.909;.
    4)
    Violation of the MRDL for chlorine dioxide, as defined in Section
    611.313(a), when one or more samples taken in the distribution system the
    day following an exceedence of the MRDL at the entrance of the
    distribution system exceed the MRDL, or when the water supplier does
    not take the required samples in the distribution system, as specified in
    Section 611.383(c)(2)(A);.
    5)
    This subsection (a)(5) refers to a violation of the former turbidity standard
    of Section 611.320, which the Board repealed because it applied to no
    135
    suppliers in Illinois. This statement maintains structural consistency with
    the federal regulations;.
    6)
    Violation of the Surface Water Treatment Rule (SWTR), Interim
    Enhanced Surface Water Treatment Rule (IESWTR), or Long Term 1
    Enhanced Surface Water Treatment Rule (LT1ESWTR) treatment
    technique requirement resulting from a single exceedence of the maximum
    allowable turbidity limit (as identified in Appendix G), where the Agency
    determines after consultation that a Tier 1 notice is required or where
    consultation does not take place within 24 hours after the supplier learns
    of the violation;.
    7)
    Occurrence of a waterborne disease outbreak, as defined in Section
    611.101, or other waterborne emergency (such as a failure or significant
    interruption in key water treatment processes, a natural disaster that
    disrupts the water supply or distribution system, or a chemical spill or
    unexpected loading of possible pathogens into the source water that
    significantly increases the potential for drinking water contamination);.
    8)
    Detection of E. coli, enterococci, or coliphage in source water samples, as
    specified in Section 611.802(a) and (b).
    89)
    Other violations or situations with significant potential to have serious
    adverse effects on human health as a result of short-term exposure, as
    determined by the Agency by a SEP issued pursuant to Section 611.110.
    b)
    When the Tier 1 public notice is to be provided. Additional steps required. A
    PWS supplier must do the following:
    1)
    It must provide a public notice as soon as practical but no later than 24
    hours after the supplier learns of the violation;
    2)
    It must initiate consultation with the Agency as soon as practical, but no
    later than 24 hours after the PWS supplier learns of the violation or
    situation, to determine additional public notice requirements; and
    3)
    It must comply with any additional public notification requirements
    (including any repeat notices or direction on the duration of the posted
    notices) that are established as a result of the consultation with the
    Agency. Such requirements may include the timing, form, manner,
    frequency, and content of repeat notices (if any) and other actions
    designed to reach all persons served.
    c)
    The form and manner of the public notice. A PWS supplier must provide the
    notice within 24 hours in a form and manner reasonably calculated to reach all
    persons served. The form and manner used by the PWS supplier are to fit the
    136
    specific situation, but must be designed to reach residential, transient, and non-
    transient users of the water system. In order to reach all persons served, a water
    supplier is to use, at a minimum, one or more of the following forms of delivery:
    1)
    Appropriate broadcast media (such as radio and television);
    2)
    Posting of the notice in conspicuous locations throughout the area served
    by the water supplier;
    3)
    Hand delivery of the notice to persons served by the water supplier; or
    4)
    Another delivery method approved in writing by the Agency by a SEP
    issued pursuant to Section 611.110.
    BOARD NOTE: Derived from 40 CFR 141.202 (2002) (2006), as amended at 71 Fed. Reg. 65574
    (Nov. 8, 2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.903
    Tier 2 Public Notice: Form, Manner, and Frequency of Notice
    a)
    Violations or situations that require a Tier 2 public notice. This subsection (a)
    lists the violation categories and other situations requiring a Tier 2 public notice.
    Appendix G to this Part identifies the tier assignment for each specific violation
    or situation.
    1)
    All violations of the MCL, MRDL, and treatment technique requirements,
    except where a Tier 1 notice is required under Section 611.902(a) or
    where the Agency determines by a SEP issued pursuant to Section
    611.110 that a Tier 1 notice is required;.
    2)
    Violations of the monitoring and testing procedure requirements, where
    the Agency determines by a SEP issued pursuant to Section 611.110 that a
    Tier 2 rather than a Tier 3 public notice is required, taking into account
    potential health impacts and persistence of the violation; and
    .
    3)
    Failure to comply with the terms and conditions of any relief equivalent to
    a SDWA section 1415 variance or a SDWA section 1416 exemption in
    place.
    4)
    Failure to take corrective action or failure to maintain at least 4-log
    treatment of viruses (using inactivation, removal, or an Agency-approved
    combination of 4-log virus inactivation and removal) before or at the first
    customer pursuant to Section 611.803(a).
    b)
    When Tier 2 public notice is to be provided.
    137
    1)
    A PWS supplier must provide the public notice as soon as practical, but no
    later than 30 days after the supplier learns of the violation. If the public
    notice is posted, the notice must remain in place for as long as the
    violation or situation persists, but in no case for less than seven days, even
    if the violation or situation is resolved. The Agency may, in appropriate
    circumstances, by a SEP issued pursuant to Section 611.110, allow
    additional time for the initial notice of up to three months from the date
    the supplier learns of the violation. It is not appropriate for the Agency to
    grant an extension to the 30-day deadline for any unresolved violation or
    to allow across-the-board extensions by rule or policy for other violations
    or situations requiring a Tier 2 public notice. Extensions granted by the
    Agency must be in writing.
    2)
    The PWS supplier must repeat the notice every three months as long as the
    violation or situation persists, unless the Agency determines that
    appropriate circumstances warrant a different repeat notice frequency. In
    no circumstance may the repeat notice be given less frequently than once
    per year. It is not appropriate for the Agency to allow less frequent repeat
    notice for an MCL violation under the Total Coliform Rule or a treatment
    technique violation under the Surface Water Treatment Rule or Interim
    Enhanced Surface Water Treatment Rule. It is also not appropriate for the
    Agency to allow across-the-board reductions in the repeat notice
    frequency for other ongoing violations requiring a Tier 2 repeat notice.
    An Agency determination allowing repeat notices to be given less
    frequently than once every three months must be in writing.
    3)
    For the turbidity violations specified in this subsection (b)(3), a PWS
    supplier must consult with the Agency as soon as practical but no later
    than 24 hours after the supplier learns of the violation, to determine
    whether a Tier 1 public notice under Section 611.902(a) is required to
    protect public health. When consultation does not take place within the
    24-hour period, the water system must distribute a Tier 1 notice of the
    violation within the next 24 hours (i.e., no later than 48 hours after the
    supplier learns of the violation), following the requirements under Section
    611.902(b) and (c). Consultation with the Agency is required for the
    following:
    A)
    Violation of the turbidity MCL under Section 611.320(b); or
    B)
    Violation of the SWTR, IESWTR, or treatment technique
    requirement resulting from a single exceedence of the maximum
    allowable turbidity limit.
    c)
    The form and manner of Tier 2 public notice. A PWS supplier must provide the
    initial public notice and any repeat notices in a form and manner that is
    138
    reasonably calculated to reach persons served in the required time period. The
    form and manner of the public notice may vary based on the specific situation and
    type of water system, but it must at a minimum meet the following requirements:
    1)
    Unless directed otherwise by the Agency in writing, by a SEP issued
    pursuant to Section 611.110, a CWS supplier must provide notice by the
    following:
    A)
    Mail or other direct delivery to each customer receiving a bill and
    to other service connections to which water is delivered by the
    PWS supplier; and
    B)
    Any other method reasonably calculated to reach other persons
    regularly served by the supplier, if they would not normally be
    reached by the notice required in subsection (c)(1)(A) of this
    Section. Such persons may include those who do not pay water
    bills or do not have service connection addresses (e.g., house
    renters, apartment dwellers, university students, nursing home
    patients, prison inmates, etc.). Other methods may include:
    Publication in a local newspaper; delivery of multiple copies for
    distribution by customers that provide their drinking water to
    others (e.g., apartment building owners or large private
    employers); posting in public places served by the supplier or on
    the Internet; or delivery to community organizations.
    2)
    Unless directed otherwise by the Agency in writing, by a SEP issued
    pursuant to Section 611.110, a non-CWS supplier must provide notice by
    the following means:
    A)
    Posting the notice in conspicuous locations throughout the
    distribution system frequented by persons served by the supplier,
    or by mail or direct delivery to each customer and service
    connection (where known); and
    B)
    Any other method reasonably calculated to reach other persons
    served by the system if they would not normally be reached by the
    notice required in subsection (c)(2)(A) of this Section. Such
    persons may include those served who may not see a posted notice
    because the posted notice is not in a location they routinely pass
    by. Other methods may include the following: Publication in a
    local newspaper or newsletter distributed to customers; use of E-
    mail to notify employees or students; or delivery of multiple copies
    in central locations (e.g., community centers).
    BOARD NOTE: Derived from 40 CFR 141.203 (2002) (2006), as amended at 71 Fed. Reg. 65574
    (Nov. 8, 2006).
    139
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.911
    Special Notice for Cryptosporidium
    a)
    When the special notice for repeated failure to monitor must be given. The owner
    or operator of a CWS or non-CWS that is required to monitor source water
    pursuant to Section 611.1001 must notify persons served by its water system that
    monitoring has not been completed as specified no later than 30 days after the
    system has failed to collect any three months of monitoring, as specified in
    Section 611.1001(c). The notice must be repeated as specified in Section
    611.903(b).
    b)
    When the special notice for failure to determine bin classification or mean
    Cryptosporidium level must be given. The owner or operator of a CWS or non-
    CWS that is required to determine a bin classification pursuant to Section
    611.1010, or one that is required to determine mean Cryptosporidium level
    pursuant to Section 611.1012, must notify persons served by its water system that
    the determination has not been made as required no later than 30 days after the
    system has failed report the determination as specified in Section 611.1010(e) or
    Section 611.1012(a), respectively. The supplier must repeat the notice as
    specified in Section 611.903(b). The notice is not required if the system is
    complying with an Agency-approved schedule to address the violation.
    c)
    The form and manner of the special notice. The form and manner of the public
    notice must follow the requirements for a Tier 2 public notice prescribed in
    Section 611.903(c). The public notice must be presented as required in Section
    611.905(c).
    d)
    Mandatory language that must be contained in the special notice. The notice must
    contain all of the following language, including the language necessary to fill in
    the blanks:
    1)
    The special notice for repeated failure to conduct monitoring must contain
    the following mandatory language:
    We are required to monitor the source of your drinking water for
    Cryptosporidium. Results of the monitoring are to be used to
    determine whether water treatment at the [treatment plant name] is
    sufficient to adequately remove Cryptosporidium from your
    drinking water. We are required to complete this monitoring and
    make this determination before [required bin determination date].
    We [insert the applicable of the following at this point: “did not
    monitor or test” or “did not complete all monitoring or testing”] on
    schedule and, therefore, we may not be able to determine before
    the required date what treatment modifications, if any, must be
    140
    made to ensure adequate Cryptosporidium removal. Missing this
    deadline may, in turn, jeopardize our ability to have the required
    treatment modifications, if any, completed before the deadline
    required, [date]. For more information, please call [name of water
    system contact] of [name of water system] at [phone number].
    2)
    The special notice for failure to determine bin classification or mean
    Cryptosporidium level must contain the following mandatory language:
    We are required to monitor the source of your drinking water for
    Cryptosporidium in order to determine before [date] whether water
    treatment at the [treatment plant name] is sufficient to adequately
    remove Cryptosporidium from your drinking water. We have not
    made this determination before the required date. Our failure to do
    this may jeopardize our ability to have the required treatment
    modifications, if any, completed before the required deadline of
    [date]. For more information, please call [name of water system
    contact] of [name of water system] at [phone number].
    3)
    Each special notice must also include a description of what the supplier is
    doing to correct the violation and when the supplier expects to return to
    compliance or resolve the situation.
    BOARD NOTE: Derived from 40 CFR 141.211 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    SUBPART W: INITIAL DISTRIBUTION SYSTEM EVALUATIONS
    Section 611.920
    General Requirements
    a)
    USEPA has designated that the requirements of this Subpart W constitute
    National Primary Drinking Water Regulations. The regulations in this Subpart W
    establish monitoring and other requirements for identifying Subpart Y compliance
    monitoring locations for determining compliance with maximum contaminant
    levels for TTHMs and HAA5. The supplier must use an initial distribution
    system evaluation (IDSE) to determine the locations in its distribution system that
    are representative of high TTHM and HAA5 concentrations throughout the
    supplier’s distribution system. An IDSE is used in conjunction with, but separate
    from, Subpart I compliance monitoring, to identify and select Subpart Y
    compliance monitoring locations.
    b)
    Applicability. A supplier is subject to the requirements of this Subpart W if it
    fulfills any of the following conditions:
    1)
    The supplier owns or operates a community water system that uses a
    141
    primary or residual disinfectant other than ultraviolet light;
    2)
    The supplier delivers water that has been treated with a primary or
    residual disinfectant other than ultraviolet light; or
    3)
    The supplier owns or operates a non-transient non-community water
    system that serves at least 10,000 people, and it either uses a primary or
    residual disinfectant other than ultraviolet light, or it delivers water that
    has been treated with a primary or residual disinfectant other than
    ultraviolet light.
    c)
    Schedule. A supplier must comply with the requirements of this Subpart W on
    the schedule provided in subsection (c)(1) of this Section based on its system
    type, as set forth in the applicable of subsections (c)(1)(A) through (c)(1)(D) of
    this Section, subject to the conditions of subsections (c)(1)(E) through (c)(1)(G)
    of this Section:
    1)
    Compliance dates.
    A)
    A supplier that serves a population of 100,000 or more persons
    must either have submitted its standard monitoring plan, its
    system-specific study plan, or its 40/30 certification or must have
    obtained or have been subject to a very small system waiver before
    October 1, 2006. The supplier must further complete its standard
    monitoring or system-specific study before September 30, 2008
    and submit its IDSE report to the Agency before January 1, 2009.
    B)
    A supplier that serves a population of 50,000 to 99,999 persons
    must either have submitted its standard monitoring plan, its
    system-specific study plan, or its 40/30 certification or must have
    obtained or have been subject to a very small system waiver before
    April 1, 2007. The supplier must further complete its standard
    monitoring or system-specific study before March 31, 2009 and
    submit its IDSE report to the Agency before July 1, 2009.
    C)
    A supplier that serves a population of 10,000 to 49,999 persons
    must submit its standard monitoring plan, its system-specific study
    plan, or its 40/30 certification or must obtain or be subject to a
    very small system waiver before October 1, 2007. The supplier
    must further complete its standard monitoring or system-specific
    study before September 30, 2009 and submit its IDSE report to the
    Agency before January 1, 2010.
    D)
    A supplier that serves a population of fewer than 10,000 persons
    (and which is a CWS) must submit its standard monitoring plan, its
    system-specific study plan, or its 40/30 certification or must obtain
    142
    or be subject to a very small system waiver before April 1, 2008.
    The supplier must further complete its standard monitoring or
    system-specific study before March 31, 2010 and submit its IDSE
    report to the Agency before July 1, 2010.
    E)
    If, within 12 months after the date when submission of the
    standard monitoring plan, the system-specific study plan, or the
    40/30 certification or becoming subject to a very small system
    waiver is due, as identified in the applicable of subsections (a)(1)
    through (a)(4) of this Section, the Agency does not approve a
    supplier’s plan or notify the supplier that it has not yet completed
    its review, the supplier may consider the plan that it submitted as
    approved. The supplier must implement that plan, and it must
    complete standard monitoring or a system-specific study no later
    than the date when completion of the standard monitoring or
    system-specific study is due, as identified in the applicable of
    subsections (a)(1) through (a)(4) of this Section.
    F)
    The supplier must submit its 40/30 certification pursuant to
    Section 611.923 before the date indicated in the applicable of
    subsections (a)(1) through (a)(4) of this Section.
    G)
    If, within three months after the due date for submission of the
    IDSE report identified in this subsection (c)(1) (nine months after
    this date if the supplier must comply on the schedule in subsection
    (c)(1)(C) of this Section), the Agency does not approve the
    supplier’s IDSE report or notify the supplier that it has not yet
    completed its review, the supplier may consider the report that it
    submitted to the Agency, and the supplier must implement the
    recommended Subpart Y monitoring as required.
    2)
    For the purpose of determining the applicable compliance schedule in
    subsection (c)(1) of this Section, the Agency may, by a SEP issued
    pursuant to Section 611.110, determine that a combined distribution
    system does not include certain consecutive systems based on such factors
    as the receipt of water from a wholesale system only on an emergency
    basis or the receipt of only a small percentage and small volume of water
    from a wholesale system. The Agency may also determine, by a SEP
    issued pursuant to Section 611.110, that a combined distribution system
    does not include certain wholesale systems based on such factors as the
    delivery of water to a consecutive system only on an emergency basis or
    the delivery of only a small percentage and small volume of water to a
    consecutive system.
    d)
    A supplier must do one of the following: it must conduct standard monitoring
    that meets the requirements in Section 611.921; it must conduct a system-specific
    143
    study that meets the requirements in Section 611.922; it must certify to the
    Agency that it meets the 40/30 certification criteria under Section 611.923; or it
    must qualify for a very small system waiver under Section 611.924.
    1)
    The supplier must have taken the full complement of routine TTHM and
    HAA5 compliance samples required of a system that serves the
    appropriate population and which uses the appropriate source water under
    Subpart I of this Part (or the supplier must have taken the full complement
    of reduced TTHM and HAA5 compliance samples required of a system
    with the supplier’s population and source water under Subpart I of this
    Part if the supplier meets reduced monitoring criteria under Subpart I of
    this Part) during the period specified in Section 611.923(a) to meet the 40/
    30 certification criteria in Section 611.923. The supplier must have taken
    TTHM and HAA5 samples under Sections 611.381 and 611.382 to be
    eligible for the very small system waiver in Section 611.924.
    2)
    If the supplier has not taken the required samples, the supplier must
    conduct standard monitoring that meets the requirements in Section
    611.921, or a system-specific study that meets the requirements in Section
    611.922.
    e)
    The supplier must use only the analytical methods specified in Section 611.381,
    or otherwise approved by the Agency for monitoring under this Subpart W, to
    demonstrate compliance with the requirements of this Subpart W.
    f)
    IDSE results will not be used for the purpose of determining compliance with
    MCLs in Section 611.312.
    BOARD NOTE: Derived from 40 CFR 141.600 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.921
    Standard Monitoring
    a)
    Standard monitoring plan. A supplier’s standard monitoring plan must comply
    with subsections (a)(1) through (a)(4) of this Section. The supplier must prepare
    and submit its standard monitoring plan to the Agency according to the
    appropriate of the schedules provided in Section 611.920(c).
    1)
    The supplier’s standard monitoring plan must include a schematic of its
    distribution system (including distribution system entry points and their
    sources, and storage facilities), with notes indicating locations and dates of
    all projected standard monitoring, and all projected Subpart I compliance
    monitoring.
    2)
    The supplier’s standard monitoring plan must include justification of
    144
    standard monitoring location selection and a summary of data the supplier
    relied on to justify standard monitoring location selection.
    3)
    The supplier’s standard monitoring plan must specify the population
    served and its system type (i.e., that it is a Subpart B or groundwater
    system).
    4)
    The supplier must retain a complete copy of its standard monitoring plan
    submitted under this subsection (a), including any Agency modification of
    the plan, for as long as the supplier is required to retain its IDSE report
    under subsection (c)(4) of this Section.
    b)
    Standard monitoring.
    1)
    The supplier must monitor as indicated in the applicable of subsections
    (b)(1)(A) through (b)(1)(P) of this Section, subject to the limitations of
    subsections (b)(1)(Q) and (b)(1)(R) of this Section. The supplier must
    collect dual sample sets at each monitoring location. One sample in the
    dual sample set must be analyzed for TTHM. The other sample in the
    dual sample set must be analyzed for HAA5. The supplier must conduct
    one monitoring period during the peak historical month for TTHM levels
    or HAA5 levels or the month of warmest water temperature. The supplier
    must review available compliance, study, or operational data to determine
    the peak historical month for TTHM or HAA5 levels or warmest water
    temperature.
    A)
    A Subpart B system supplier that serves fewer than 500 persons
    and which operates a consecutive system must collect samples
    once each calendar year during the peak historical month: one
    near an entry point to the distribution system and one at a high
    TTHM location, for a total of two samples during each monitoring
    period.
    B)
    A Subpart B system supplier that serves fewer than 500 persons
    and which does not operate a consecutive system must collect
    samples once each calendar year during the peak historical month:
    one at a high TTHM location and one at a high HAA5 location, for
    a total of two samples during each monitoring period.
    C)
    A Subpart B system supplier that serves 500 to 3,300 persons and
    which operates a consecutive system must collect samples four
    times each calendar year (once every 90 days): one near an entry
    point to the distribution system and one at a high TTHM location,
    for a total of two samples during each monitoring period.
    D)
    A Subpart B system supplier that serves 500 to 3,300 persons and
    145
    which does not operate a consecutive system must collect samples
    four times each calendar year (once every 90 days): one at a high
    TTHM location and one at a high HAA5 location, for a total of
    two samples during each monitoring period.
    E)
    A Subpart B system supplier that serves 3,301 to 9,999 persons
    must collect samples four times each calendar year (once every 90
    days): one at a location in the distribution system that represents
    the average residence time, two at high TTHM locations, and one
    at a high HAA5 location, for a total of four samples during each
    monitoring period.
    F)
    A Subpart B system supplier that serves 10,000 to 49,999 persons
    must collect samples six times each calendar year (once every 60
    days): one near an entry point to the distribution system, two at
    locations in the distribution system that represent the average
    residence time, three at each TTHM location, and two at high
    HAA5 locations, for a total of eight samples during each
    monitoring period.
    G)
    A Subpart B system supplier that serves 50,000 to 249,999 persons
    must collect samples six times each calendar year (once every 60
    days): three near entry points to the distribution system, four at
    locations in the distribution system that represent the average
    residence time, five at high TTHM locations, and four at high
    HAA5 locations, for a total of 16 samples during each monitoring
    period.
    H)
    A Subpart B system supplier that serves 250,000 to 999,999
    persons must collect samples six times each calendar year (once
    every 60 days): four near entry points to the distribution system,
    six at locations in the distribution system that represent the average
    residence time, eight at high TTHM locations, and six at high
    HAA5 locations, for a total of 24 samples during each monitoring
    period.
    I)
    A Subpart B system supplier that serves 1,000,000 to 4,999,999
    persons must collect samples six times each calendar year (once
    every 60 days): six near entry points to the distribution system,
    eight at locations in the distribution system that represent the
    average residence time, 10 at high TTHM locations, and eight at
    high HAA5 locations, for a total of 32 samples during each
    monitoring period.
    J)
    A Subpart B system supplier that serves 5,000,000 or more persons
    must collect samples six times each calendar year (once every 60
    146
    days): eight near entry points to the distribution system, 10 at
    locations in the distribution system that represent the average
    residence time, 12 at high TTHM locations, and 10 at high HAA5
    locations, for a total of 40 samples during each monitoring period.
    K)
    A groundwater system supplier that serves fewer than 500 persons
    and which operates a consecutive system must collect samples
    once each calendar year during the peak historical month: one
    near an entry point to the distribution system and one at a high
    TTHM location, for a total of two samples during each monitoring
    period.
    L)
    A groundwater system supplier that serves fewer than 500 persons
    and which does not operate a consecutive system must collect
    samples once each calendar year during the peak historical month:
    one at a high TTHM location and one at a high HAA5 location, for
    a total of two samples during each monitoring period.
    M)
    A groundwater system supplier that serves 500 to 9,999 persons
    must collect samples four times each calendar year (once every 90
    days): one at a high TTHM location and one at a high HAA5
    location, for a total of two samples during each monitoring period.
    N)
    A groundwater system supplier that serves 10,000 to 99,999
    persons must collect samples four times each calendar year (once
    every 90 days): one near an entry point to the distribution system,
    one at a location in the distribution system that represents the
    average residence time, two at high TTHM locations, and two at
    high HAA5 locations, for a total of six samples during each
    monitoring period.
    O)
    A groundwater system supplier that serves 100,000 to 499,999
    persons must collect samples four times each calendar year (once
    every 90 days): one near an entry point to the distribution system,
    one at a location in the distribution system that represents the
    average residence time, three at high TTHM locations, and three at
    high HAA5 locations, for a total of eight samples during each
    monitoring period.
    P)
    A groundwater system supplier that serves 500,000 or more
    persons must collect samples four times each calendar year (once
    every 90 days): two near an entry point to the distribution system,
    two at locations in the distribution system that represent the
    average residence time, four at high TTHM locations, and four at
    high HAA5 locations, for a total of 12 samples during each
    monitoring period.
    147
    Q)
    A dual sample set (i.e., a TTHM and an HAA5 sample) must be
    taken at each monitoring location during each monitoring period.
    R)
    The “peak historical month,” for the purposes of subsections
    (b)(1)(A), (b)(1)(B), (b)(1)(K), and (b)(1)(L) of this Section,
    means the month with the highest TTHM or HAA5 levels or the
    warmest water temperature.
    2)
    The supplier must take samples at locations other than the existing
    Subpart I monitoring locations. Monitoring locations must be distributed
    throughout the distribution system.
    3)
    If the number of entry points to the distribution system is fewer than the
    specified number of entry point monitoring locations, excess entry point
    samples must be equally replaced at high TTHM and HAA5 locations. If
    there is an odd extra location number, the supplier must take a sample at a
    high TTHM location. If the number of entry points to the distribution
    system is more than the specified number of entry point monitoring
    locations, the supplier must take samples at the entry points to the
    distribution system that have the highest annual water flows.
    4)
    The supplier’s monitoring under this subsection (b) may not be reduced
    under the provisions of Section 611.500, and the Agency may not reduce
    the supplier’s monitoring using the provisions of Section 611.161.
    c)
    IDSE report. A supplier’s IDSE report must include the elements required in
    subsections (c)(1) through (c)(4) of this Section. The supplier must submit its
    IDSE report to the Agency according to the applicable of the schedules set forth
    in Section 611.920(c).
    1)
    The supplier’s IDSE report must include all TTHM and HAA5 analytical
    results from Subpart I compliance monitoring and all standard monitoring
    conducted during the period of the IDSE as individual analytical results
    and LRAAs presented in a tabular or spreadsheet format acceptable to the
    Agency. If changed from the supplier’s standard monitoring plan
    submitted pursuant to subsection (a) of this Section, the supplier’s report
    must also include a schematic of the supplier’s distribution system, the
    population served, and system type (Subpart B system or groundwater
    system).
    2)
    The supplier’s IDSE report must include an explanation of any deviations
    from the supplier’s approved standard monitoring plan.
    3)
    The supplier must recommend and justify Subpart Y compliance
    monitoring locations and timing based on the protocol in Section 611.925.
    148
    4)
    The supplier must retain a complete copy of its IDSE report submitted
    under this Section for 10 years after the date on which the supplier
    submitted the supplier’s report. If the Agency modifies the Subpart Y
    monitoring requirements that the supplier recommended in its IDSE report
    or if the Agency approves alternative monitoring locations pursuant to
    Section 611.161, the supplier must keep a copy of the Agency’s
    notification on file for 10 years after the date of the Agency’s notification.
    The supplier must make the IDSE report and any Agency notification
    available for review by the Agency or the public.
    BOARD NOTE: Derived from 40 CFR 141.601 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.922
    System-Specific Studies
    a)
    System-specific study plan. A supplier’s system-specific study plan must be
    based on either existing monitoring results, as required under subsection (a)(1) of
    this Section, or modeling, as required under subsection (a)(2) of this Section. The
    supplier must prepare and submit the supplier’s system-specific study plan to the
    Agency according to the schedule in Section 611.920(c).
    1)
    Existing monitoring results. A supplier may comply by submitting
    monitoring results collected before it is required to begin monitoring
    pursuant to Section 611.920(c). The monitoring results and analysis must
    meet the criteria in subsections (a)(1)(A) and (a)(1)(B) of this Section.
    A)
    Minimum requirements.
    i)
    TTHM and HAA5 results must be based on samples
    collected and analyzed in accordance with Section 611.381.
    Samples must be collected no earlier than five years prior
    to the study plan submission date.
    ii)
    The monitoring locations and frequency must meet the
    conditions identified in the applicable of subsections
    (a)(1)(A)(iii) through (a)(1)(A)(xv) of this Section. Each
    location must be sampled once during the peak historical
    month for TTHM levels or HAA5 levels or the month of
    warmest water temperature for every 12 months of data
    submitted for that location. Monitoring results must
    include all Subpart I compliance monitoring results, plus
    additional monitoring results as necessary to meet
    minimum sample requirements.
    149
    iii)
    A Subpart B system supplier that serves fewer than 500
    persons must collect samples from three monitoring
    locations: three samples for TTHM and three samples for
    HAA5.
    iv)
    A Subpart B system supplier that serves 500 to 3,300
    persons must collect samples from three monitoring
    locations: nine samples for TTHM and nine samples for
    HAA5.
    v)
    A Subpart B system supplier that serves 3,301 to 9,999
    persons must collect samples from six monitoring
    locations: 36 samples for TTHM and 36 samples for
    HAA5.
    vi)
    A Subpart B system supplier that serves 10,000 to 49,999
    persons must collect samples from each of 12 monitoring
    locations: 72 samples for TTHM and 72 samples for
    HAA5.
    vii)
    A Subpart B system supplier that serves 50,000 to 249,999
    persons must collect samples from 24 monitoring locations:
    144 samples for TTHM and 144 samples for HAA5.
    viii)
    A Subpart B system supplier that serves 250,000 to
    999,999 persons must collect samples from 36 monitoring
    locations: 216 samples for TTHM and 216 samples for
    HAA5.
    ix)
    A Subpart B system supplier that serves 1,000,000 to
    4,999,999 persons must collect samples from 48
    monitoring locations: 288 samples for TTHM and 288
    samples for HAA5.
    x)
    A Subpart B system supplier that serves 5,000,000 or more
    persons must collect samples from 60 monitoring locations:
    360 samples for TTHM and 360 samples for HAA5.
    xi)
    A groundwater system supplier that serves fewer than 500
    persons must collect samples from three monitoring
    locations: three samples for TTHM and three samples for
    HAA5.
    xii)
    A groundwater system supplier that serves 500 to 9,999
    persons must collect samples from three monitoring
    locations: nine samples for TTHM and nine samples for
    150
    HAA5.
    xiii)
    A groundwater system supplier that serves 10,000 to
    99,999 persons must collect samples from 12 monitoring
    locations: 48 samples for TTHM and 48 samples for
    HAA5.
    xiv)
    A groundwater system supplier that serves 100,000 to
    499,999 persons must collect samples from 18 monitoring
    locations: 72 samples for TTHM and 72 samples for
    HAA5.
    xv)
    A groundwater system supplier that serves 500,000 or more
    persons must collect samples from 24 monitoring locations:
    96 samples for TTHM and 96 samples for HAA5.
    B)
    Reporting monitoring results. A supplier must report the following
    information:
    i)
    The supplier must report previously collected monitoring
    results and certify that the reported monitoring results
    include all compliance and noncompliance results
    generated during the time period that began with the first
    reported result and which ended with the most recent
    Subpart I results;
    ii)
    The supplier must certify that the samples were
    representative of the entire distribution system and
    treatment and that the distribution system and treatment
    have not changed significantly since the samples were
    collected;
    iii)
    The supplier’s study monitoring plan must include a
    schematic of its distribution system (including distribution
    system entry points and their sources and storage facilities
    in the system), with notes indicating the locations and dates
    of all completed or planned system-specific study
    monitoring;
    iv)
    The supplier’s system-specific study plan must specify the
    population served and its system type (i.e., that it is a
    Subpart B or groundwater system);
    v)
    The supplier must retain a complete copy of its system-
    specific study plan submitted under this subsection (a)(1),
    including any Agency modification of the supplier’s
    151
    system-specific study plan, for as long as the supplier is
    required to retain its IDSE report under subsection (b)(5) of
    this Section; and
    vi)
    If the supplier submits previously collected data that fully
    meet the number of samples required under subsection
    (a)(1)(A)(ii) of this Section, and the Agency rejects some
    of the data in writing, by a SEP issued pursuant to Section
    611.110, the supplier must either conduct additional
    monitoring to replace rejected data on a schedule approved
    by the Agency in the SEP, or it must conduct standard
    monitoring under Section 611.921.
    2)
    Modeling. A supplier may comply through analysis of an extended-period
    simulation hydraulic model. The extended-period simulation hydraulic
    model and analysis must meet the following criteria:
    A)
    Minimum extended-period hydraulic model requirements.
    i)
    The extended-period hydraulic model must simulate 24
    hour variation in demand and show a consistently repeating
    24 hour pattern of residence time.
    ii)
    The extended-period hydraulic model must represent the
    criteria listed in subsection (a)(2)(D) of this Section.
    BOARD NOTE: This subsection (a)(2)(A)(ii) is derived
    from 40 CFR 141.602(a)(2)(i)(B), as added at 71 Fed. Reg.
    388 (Jan. 4, 2006). The Board has codified 40 CFR
    141.602(a)(2)(i)(B)(
    1
    ) through (a)(2)(i)(B)(
    9
    ) as
    subsections (a)(2)(D)(i) through (a)(2)(D)(ix) of this
    Section to comport with Illinois Administrative Code
    codification requirements.
    iii)
    The extended-period hydraulic model must be calibrated or
    have calibration plans for the current configuration of the
    distribution system during the period of high TTHM
    formation potential. All storage facilities in the system
    must be evaluated as part of the calibration process. All
    required calibration must be completed no later than 12
    months after the supplier has submitted the plan.
    B)
    Reporting modeling. The supplier’s system-specific study plan
    must include the information described in subsections (a)(2)(B)(i)
    through (a)(2)(B)(vii) of this Section, subject to the requirements
    of subsection (a)(2)(B)(vii) of this Section.
    152
    i)
    Tabular or spreadsheet data demonstrating that the model
    meets requirements in subsections (a)(2)(A)(ii) and
    (a)(2)(D) of this Section.
    ii)
    A description of all calibration activities undertaken and, if
    calibration is complete, a graph of predicted tank levels
    versus measured tank levels for the system storage facility
    with the highest residence time in each pressure zone, and a
    time-series graph of the residence time at the longest
    residence time storage facility in the distribution system
    showing the predictions for the entire simulation period
    (i.e., from time zero until the time it takes for the model to
    reach a consistently repeating pattern of residence time).
    iii)
    Model output showing preliminary 24-hour average
    residence time predictions throughout the distribution
    system.
    iv)
    The timing and the number of samples representative of the
    distribution system planned for at least one monitoring
    period of TTHM and HAA5 dual-sample monitoring at a
    number of locations no fewer than would be required for
    the system under standard monitoring in Section 611.921
    during the historical month of high TTHM. These samples
    must be taken at locations other than existing Subpart I
    compliance monitoring locations.
    v)
    A description of how all requirements will be completed no
    later than 12 months after the supplier submits the
    supplier’s system-specific study plan.
    vi)
    A schematic of the supplier’s distribution system (including
    distribution system entry points and their sources and
    system storage facilities), with notes indicating the
    locations and dates of all completed system-specific study
    monitoring (if calibration is complete) and all Subpart I
    compliance monitoring.
    vii)
    The population served and system type (i.e., that it is a
    Subpart B or groundwater system).
    viii)
    The supplier must retain a complete copy of the supplier’s
    system-specific study plan submitted under this subsection
    (a)(2), including any Agency modification of the supplier’s
    system-specific study plan, for as long as the supplier is
    153
    required to retain the supplier’s IDSE report under
    subsection (b)(7) of this Section.
    C)
    If the supplier submits a model that does not fully meet the
    requirements under subsection (a)(2) of this Section, the supplier
    must correct the Agency-cited deficiencies and respond to Agency
    inquiries concerning the model. If the supplier fails to correct
    deficiencies or respond to inquiries to the Agency’s satisfaction,
    the supplier must conduct standard monitoring under Section
    611.921.
    D)
    The extended-period hydraulic model must represent the following
    criteria:
    i)
    75 percent of pipe volume;
    ii)
    50 percent of pipe length;
    iii)
    All pressure zones;
    iv)
    All 12-inch diameter and larger pipes;
    v)
    All eight-inch and larger pipes that connect pressure zones,
    influence zones from different sources, storage facilities,
    major demand areas, pumps, and control valves or which
    are known or expected to be significant conveyors of water;
    vi)
    All six-inch and larger pipes that connect remote areas of a
    distribution system to the main portion of the system;
    vii)
    All storage facilities with standard operations represented
    in the model;
    viii)
    All active pump stations with controls represented in the
    model; and
    ix)
    All active control valves.
    BOARD NOTE: This subsection (a)(2)(D) is derived from 40
    CFR 141.602(a)(2)(i)(B), as added at 71 Fed. Reg. 388 (Jan. 4,
    2006). The Board has codified 40 CFR 141.602(a)(2)(i)(B)(
    1
    )
    through (a)(2)(i)(B)(
    9
    ) as subsections (a)(2)(D)(i) through
    (a)(2)(D)(ix) of this Section to comport with Illinois
    Administrative Code codification requirements.
    b)
    IDSE report. The supplier’s IDSE report must include the elements required in
    154
    subsections (b)(1) through (b)(6) of this Section. The supplier must submit its
    IDSE report according to the applicable of the schedules in Section 611.920(c).
    1)
    The supplier’s IDSE report must include all TTHM and HAA5 analytical
    results from Subpart I compliance monitoring and all system-specific
    study monitoring conducted during the period of the system-specific study
    presented in a tabular or spreadsheet format acceptable to the Agency. If
    changed from the supplier’s system-specific study plan submitted under
    subsection (a) of this Section, the supplier’s IDSE report must also include
    a schematic of its distribution system, the population served, and system
    type (i.e., that it is a Subpart B or groundwater system).
    2)
    If the supplier used the modeling provision under subsection (a)(2) of this
    Section, it must include final information for the elements described in
    subsection (a)(2)(B) of this Section, and a 24-hour time-series graph of
    residence time for each Subpart Y compliance monitoring location
    selected.
    3)
    The supplier must recommend and justify Subpart Y compliance
    monitoring locations and timing based on the protocol in Section 611.925.
    4)
    The supplier’s IDSE report must include an explanation of any deviations
    from its approved system-specific study plan.
    5)
    The supplier’s IDSE report must include the basis (analytical and
    modeling results) and justification that it used to select the recommended
    Subpart Y monitoring locations.
    6)
    The supplier may submit its IDSE report in lieu of its system-specific
    study plan on the schedule identified in Section 611.920(c) for submission
    of the system-specific study plan if the supplier believes that it has the
    necessary information before the time that the system-specific study plan
    is due. If the supplier elects this approach, its IDSE report must also
    include all information required under subsection (a) of this Section.
    7)
    The supplier must retain a complete copy of its IDSE report submitted
    under this Section for 10 years after the date that the supplier submitted its
    IDSE report. If the Agency modifies the Subpart Y monitoring
    requirements that the supplier recommended in the supplier’s IDSE report
    or if the Agency approves alternative monitoring locations, the supplier
    must keep a copy of the Agency’s notification on file for 10 years after the
    date of the Agency’s notification. The supplier must make the IDSE
    report and any Agency notification available for review by the Agency or
    the public.
    BOARD NOTE: Derived from 40 CFR 141.602 (2006).
    155
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.923
    40/30 Certification
    a)
    Eligibility. A supplier is eligible for 40/ 30 certification if it had no TTHM or
    HAA5 monitoring violations under Subpart I of this Part and no individual
    sample exceeded 0.040 mg/ℓ for TTHM or 0.030 mg/ℓ for HAA5 during an eight
    consecutive calendar quarter period beginning no earlier than the date specified in
    the applicable of subsections (a)(1) through (a)(4) of this Section, subject to the
    limitations of subsection (a)(5) of this Section.
    1)
    If the supplier’s 40/30 certification is due no later than October 1, 2006,
    then its eligibility for 40/30 certification is based on eight consecutive
    calendar quarters of Subpart I compliance monitoring results beginning no
    earlier than January 2004.
    2)
    If the supplier’s 40/30 certification is due no later than April 1, 2007, then
    its eligibility for 40/30 certification is based on eight consecutive calendar
    quarters of Subpart I compliance monitoring results beginning no earlier
    than January 2004.
    3)
    If the supplier’s 40/30 certification is due no later than October 1, 2007,
    then its eligibility for 40/30 certification is based on eight consecutive
    calendar quarters of Subpart I compliance monitoring results beginning no
    earlier than January 2005.
    4)
    If the supplier’s 40/30 certification is due no later than April 1, 2008, then
    its eligibility for 40/30 certification is based on eight consecutive calendar
    quarters of Subpart I compliance monitoring results beginning no earlier
    than January 2005.
    5)
    Eligibility for 40/30 certification is based on eight consecutive calendar
    quarters of Subpart I compliance monitoring results beginning no earlier
    than the date set forth in the applicable of subsections (a)(1) through (a)(4)
    of this Section, unless the supplier is on reduced monitoring under Subpart
    I of this Part and was not required to monitor during the specified period.
    If the supplier did not monitor during the specified period, the supplier
    must base its eligibility on compliance samples taken during the 12
    months preceding the specified period.
    b)
    40/30 certification.
    1)
    A supplier must certify to the Agency that every individual compliance
    sample taken under Subpart I of this Part during the applicable of the
    periods specified in subsection (a) of this Section were no more than 0.040
    156
    mg/ℓ for TTHM and 0.030 mg/ℓ for HAA5, and that the supplier has not
    had any TTHM or HAA5 monitoring violations during the period
    specified in subsection (a) of this Section.
    2)
    The Agency may require the supplier to submit compliance monitoring
    results, distribution system schematics, or recommended Subpart Y
    compliance monitoring locations in addition to the supplier’s certification.
    If the supplier fails to submit the requested information, the Agency may
    require standard monitoring under Section 611.921 or a system-specific
    study under Section 611.922.
    3)
    The Agency may still require standard monitoring under Section 611.921
    or a system-specific study under Section 611.922 even if the supplier
    meets the criteria in subsection (a) of this Section.
    4)
    The supplier must retain a complete copy of its certification submitted
    under this Section for 10 years after the date that it submitted the
    supplier’s certification. The supplier must make the certification, all data
    upon which the certification is based, and any Agency notification
    available for review by the Agency or the public.
    BOARD NOTE: Derived from 40 CFR 141.603 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.924
    Very Small System Waivers
    a)
    If the supplier serves fewer than 500 people and it has taken TTHM and HAA5
    samples pursuant to Subpart I of this Part, the supplier is not required to comply
    with this Subpart W unless the Agency notifies the supplier, by a SEP issued
    pursuant to Section 611.110, that it must conduct standard monitoring pursuant to
    Section 611.921 or a system-specific study pursuant to Section 611.922.
    b)
    If the supplier has not taken TTHM and HAA5 samples pursuant to Subpart I of
    this Part or if the Agency notifies the supplier, by a SEP issued pursuant to
    Section 611.110, that it must comply with this Subpart W, the supplier must
    conduct standard monitoring pursuant to Section 611.921 or a system-specific
    study pursuant to Section 611.922.
    BOARD NOTE: Derived from 40 CFR 141.604 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.925
    Subpart Y Compliance Monitoring Location Recommendations
    a)
    A supplier’s IDSE report must include its recommendations and justification for
    157
    where and during what months it will conduct TTHM and HAA5 monitoring for
    Subpart Y of this Part. The supplier must base its recommendations on the
    criteria set forth in subsections (b) through (e) of this Section.
    b)
    The supplier must select the number of monitoring locations specified in the
    applicable of subsections (b)(1) through (b)(13) of this Section, subject to the
    limitations of subsections (b)(14) and (b)(15) of this Section. The supplier will
    use these recommended locations as Subpart Y routine compliance monitoring
    locations, unless the Agency requires different or additional locations. The
    supplier should distribute locations throughout the distribution system to the
    extent possible.
    1)
    A Subpart B system supplier that serves fewer than 500 persons must
    annually collect samples from two monitoring locations: one sample from
    the highest TTHM location and one sample from the highest HAA5
    location.
    2)
    A Subpart B system supplier that serves 500 to 3,300 persons must
    quarterly collect samples from two monitoring locations: one sample
    from the highest TTHM location and one sample from the highest HAA5
    location.
    3)
    A Subpart B system supplier that serves 3,301 to 9,999 persons must
    quarterly collect samples from two monitoring locations: one sample
    from the highest TTHM location and one sample from the highest HAA5
    location.
    4)
    A Subpart B system supplier that serves 10,000 to 49,999 persons must
    quarterly collect samples from four monitoring locations: two samples
    from the highest TTHM locations, one sample from the highest HAA5
    location, and one sample from an existing Subpart I compliance location.
    5)
    A Subpart B system supplier that serves 50,000 to 249,999 persons must
    quarterly collect samples from eight monitoring locations: three samples
    from the highest TTHM location, three samples from the highest HAA5
    locations, and two samples from existing Subpart I compliance locations.
    6)
    A Subpart B system supplier that serves 250,000 to 999,999 persons must
    quarterly collect samples from 12 monitoring locations: five samples
    from the highest TTHM location, four samples from the highest HAA5
    locations, and three samples from existing Subpart I compliance locations.
    7)
    A Subpart B system supplier that serves 1,000,000 to 4,999,999 persons
    must quarterly collect samples from 16 monitoring locations: six samples
    from the highest TTHM location, six samples from the highest HAA5
    locations, and four samples from existing Subpart I compliance locations.
    158
    8)
    A Subpart B system supplier that serves more than 5,000,000 persons
    must quarterly collect samples from 20 monitoring locations: eight
    samples from the highest TTHM location, seven samples from the highest
    HAA5 locations, and five samples from existing Subpart I compliance
    locations.
    9)
    A groundwater system supplier that serves fewer than 500 persons must
    annually collect samples from two monitoring locations: one sample from
    the highest TTHM location and one sample from the highest HAA5
    location.
    10)
    A groundwater system supplier that serves 500 to 9,999 persons must
    annually collect samples from two monitoring locations: one sample from
    the highest TTHM location and one sample from the highest HAA5
    location.
    11)
    A groundwater system supplier that serves 10,000 to 99,999 persons must
    quarterly collect samples from four monitoring locations: two samples
    from the highest TTHM locations, one sample from the highest HAA5
    location, and one sample from an existing Subpart I compliance location.
    12)
    A groundwater system supplier that serves 100,000 to 499,999 persons
    must quarterly collect samples from six monitoring locations: three
    samples from the highest TTHM locations, two samples from the highest
    HAA5 locations, and one sample from an existing Subpart I compliance
    location.
    13)
    A groundwater system supplier that serves more than 500,000 persons
    must quarterly collect samples from eight monitoring locations: three
    samples from the highest TTHM locations, three samples from the highest
    HAA5 locations, and two samples from existing Subpart I compliance
    locations.
    14)
    The supplier must monitor during the month of highest DBP
    concentrations.
    15)
    A supplier on quarterly monitoring must take dual sample sets every 90
    days at each monitoring location, except for a Subpart B system supplier
    that serves 500 to 3,300 persons. A supplier on annual monitoring and a
    Subpart B system supplier that serves 500 to 3,300 persons is required to
    take individual TTHM and HAA5 samples (instead of a dual sample set)
    at the locations with the highest TTHM and HAA5 concentrations,
    respectively. Only one location with a dual sample set per monitoring
    period is needed if the highest TTHM and HAA5 concentrations occur at
    the same location and month, if monitored annually).
    159
    c)
    The supplier must recommend Subpart Y compliance monitoring locations based
    on standard monitoring results, system-specific study results, and Subpart I
    compliance monitoring results. The supplier must follow the protocol in
    subsections (c)(1) through (c)(8) of this Section. If required to monitor at more
    than eight locations, the supplier must repeat the protocol as necessary. If the
    supplier does not have existing Subpart I compliance monitoring results or if the
    supplier does not have enough existing Subpart I compliance monitoring results,
    the supplier must repeat the protocol, skipping the provisions of subsections (c)(3)
    and (c)(7) of this Section as necessary, until the supplier has identified the
    required total number of monitoring locations.
    1)
    The location with the highest TTHM LRAA not previously selected as a
    Subpart Y monitoring location.
    2)
    The location with the highest HAA5 LRAA not previously selected as a
    Subpart Y monitoring location.
    3)
    The existing Subpart I average residence time compliance monitoring
    location (maximum residence time compliance monitoring location for a
    groundwater system) with the highest HAA5 LRAA not previously
    selected as a Subpart Y monitoring location.
    4)
    The location with the highest TTHM LRAA not previously selected as a
    Subpart Y monitoring location.
    5)
    The location with the highest TTHM LRAA not previously selected as a
    Subpart Y monitoring location.
    6)
    The location with the highest HAA5 LRAA not previously selected as a
    Subpart Y monitoring location.
    7)
    The existing Subpart I average residence time compliance monitoring
    location (maximum residence time compliance monitoring location for a
    groundwater system) with the highest TTHM LRAA not previously
    selected as a Subpart Y monitoring location.
    8)
    The location with the highest HAA5 LRAA not previously selected as a
    Subpart Y monitoring location.
    d)
    The supplier may recommend locations other than those specified in subsection
    (c) of this Section if the supplier includes a rationale for selecting other locations.
    If the Agency approves the alternative locations, the supplier must monitor at
    these locations to determine compliance under Subpart Y of this Part.
    e)
    The supplier’s recommended schedule must include Subpart Y monitoring during
    160
    the peak historical month for TTHM and HAA5 concentration, unless the Agency
    approves another month. Once the supplier has identified the peak historical
    month, and if the supplier is required to conduct routine monitoring at least
    quarterly, the supplier must schedule Subpart Y compliance monitoring at a
    regular frequency of every 90 or fewer days.
    BOARD NOTE: Derived from 40 CFR 141.605 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    SUBPART Y: STAGE 2 DISINFECTION BYPRODUCTS REQUIREMENTS
    Section 611.970
    General Requirements
    a)
    General. The requirements of this Subpart Y constitute NPDWRs. The
    regulations in this Subpart Y establish monitoring and other requirements for
    achieving compliance with MCLs based on LRAAs for TTHM and HAA5, and
    for achieving compliance with MRDLs for chlorine and chloramine for certain
    consecutive systems.
    b)
    Applicability. A supplier is subject to these requirements if its system is a CWS
    or a NTNCWS that uses a primary or residual disinfectant other than ultraviolet
    light or which delivers water that has been treated with a primary or residual
    disinfectant other than ultraviolet light.
    c)
    Schedule. A supplier must comply with the requirements in this Subpart Y on the
    applicable schedule set forth in subsections (c)(1) through (c)(6) of this Section
    based on the supplier’s system type, subject to the limitations of subsection (b)(7)
    of this Section.
    1)
    A supplier that is not part of a combined distribution system, or a supplier
    whose system serves the largest population in a combined system, and
    whose system serves 100,000 or more persons must comply with the
    requirements of this Subpart Y before April 1, 2012.
    2)
    A supplier that is not part of a combined distribution system, or a supplier
    whose system serves the largest population in a combined system, and
    whose system serves 50,000 to 99,999 persons must comply with the
    requirements of this Subpart Y before October 1, 2012.
    3)
    A supplier that is not part of a combined distribution system, or a supplier
    whose system serves the largest population in a combined system, and
    whose system serves 10,000 to 49,999 persons must comply with the
    requirements of this Subpart Y before October 1, 2013.
    4)
    A supplier that is not part of a combined distribution system, or a supplier
    161
    whose system serves the largest population in a combined system, and
    whose system serves fewer than 10,000 persons must comply with the
    requirements of this Subpart Y before October 1, 2013 if no
    Cryptosporidium monitoring is required pursuant to Section
    611.1001(a)(4).
    5)
    A supplier that is not part of a combined distribution system, or a supplier
    whose system serves the largest population in a combined system, and
    whose system serves fewer than 10,000 persons must comply with the
    requirements of this Subpart Y before October 1, 2014 if Cryptosporidium
    monitoring is required pursuant to Section 611.1001(a)(4) or (a)(6).
    6)
    A supplier whose consecutive system or wholesale system is part of a
    combined system, other than a supplier that is subject to any of
    subsections (c)(1) through (c)(4) of this Section, must comply with the
    requirements of this Subpart Y before the earliest compliance date
    applicable to any segment of the combined distribution system.
    7)
    The Agency must, by a SEP issued pursuant to Section 611.110, grant up
    to an additional 24 months for compliance with MCLs and operational
    evaluation levels if it finds that the additional time is needed because the
    supplier requires capital improvements to comply with an MCL.
    8)
    The supplier’s monitoring frequency is specified in Section 611.971(a)(2).
    A)
    If a supplier is required to conduct quarterly monitoring, it must
    begin monitoring in the first full calendar quarter that includes the
    applicable compliance date set forth in this subsection (c).
    B)
    If a supplier is required to conduct monitoring less frequently than
    quarterly, it must begin monitoring in the calendar month
    recommended in the IDSE report prepared pursuant to Section
    611.921 or Section 611.922 or in the calendar month identified in
    the Subpart Y monitoring plan developed pursuant to Section
    611.972, but in no instance later than 12 months after the
    applicable compliance date set forth in this subsection (c).
    9)
    If a supplier is required to conduct quarterly monitoring, it must make
    compliance calculations at the end of the fourth calendar quarter that
    follows the compliance date and at the end of each subsequent quarter (or
    earlier if the LRAA calculated based on fewer than four quarters of data
    would cause the MCL to be exceeded regardless of the monitoring results
    of subsequent quarters). If a supplier is required to conduct monitoring
    less frequently than quarterly, it must make compliance calculations
    beginning with the first compliance sample taken after the compliance
    date.
    162
    10)
    For the purpose of the schedule set forth in this subsection (c), the Agency
    may, by a SEP issued pursuant to Section 611.110, determine that the
    combined distribution system does not include certain consecutive
    systems based on factors such as receipt of water from a wholesale system
    only on an emergency basis or receipt of only a small percentage and
    small volume of water from a wholesale system. The Agency may also
    determine that the combined distribution system does not include certain
    wholesale systems based on factors such as delivery of water to a
    consecutive system only on an emergency basis or delivery of only a small
    percentage and small volume of water to a consecutive system.
    BOARD NOTE: The Board found it necessary to deviate from the structure of 40
    CFR 141.620(c) when incorporating this subsection (c). Subsections (c)(1)
    through (c)(4) of this Section correspond with 40 CFR 141.620(c)(1) through
    (c)(4). Subsections (c)(5) and (c)(6) of this Section correspond with the two
    segments of 40 CFR 141.620(c)(5). Subsection (c)(7) of this Section corresponds
    with the footnote to the table in 40 CFR 141.620(c). Subsections (c)(8) through
    (c)(10) of this Section correspond with 40 CFR 141.620(c)(6) through (c)(8).
    d)
    Monitoring and compliance.
    1)
    Suppliers required to monitor quarterly. To comply with Subpart Y MCLs
    in Section 611.312(b)(2), the supplier must calculate LRAAs for TTHM
    and HAA5 using monitoring results collected under this Subpart Y, and it
    must determine that each LRAA does not exceed the MCL. If the supplier
    fails to complete four consecutive quarters of monitoring, it must calculate
    compliance with the MCL based on the average of the available data from
    the most recent four quarters. If the supplier takes more than one sample
    per quarter at a monitoring location, it must average all samples taken in
    the quarter at that location to determine a quarterly average to be used in
    the LRAA calculation.
    2)
    Suppliers required to monitor yearly or less frequently. To determine
    compliance with Subpart Y MCLs in Section 611.312(b)(2), the supplier
    must determine that each sample taken is less than the MCL. If any
    sample exceeds the MCL, the supplier must comply with the requirements
    of Section 611.975. If no sample exceeds the MCL, the sample result for
    each monitoring location is considered the LRAA for that monitoring
    location.
    e)
    Violation for failure to monitor. A supplier is in violation of the monitoring
    requirements for each quarter that a monitoring result would be used in
    calculating an LRAA if the supplier fails to monitor.
    BOARD NOTE: Derived from 40 CFR 141.620 (2006).
    163
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.971
    Routine Monitoring
    a)
    Monitoring.
    1)
    If a supplier submitted an IDSE report, it must begin monitoring at the
    locations and during the months that the supplier has recommended in its
    IDSE report submitted pursuant to Section 611.925, following the
    schedule set forth in Section 611.970(c), unless the Agency, by a SEP
    issued pursuant to Section 611.110, requires other locations or additional
    locations after its review. If the supplier submitted a 40/30 certification
    pursuant to Section 611.923, it qualified for a very small system waiver
    pursuant to Section 611.924, or it is a NTNCWS that serves fewer than
    10,000 persons, the supplier must monitor at the locations and on the dates
    identified in its monitoring plan as described in Section 611.382(f),
    updated as required by Section 611.972.
    2)
    The supplier must monitor at no fewer than the number of locations
    identified in the applicable of subsections (a)(2)(A) through (a)(2)(M) of
    this Section, subject to the limitations of subsections (a)(2)(N) and
    (a)(2)(O) of this Section.
    A)
    A Subpart B system supplier that serves fewer than 500 persons
    must monitor annually at two distribution system monitoring
    locations during each monitoring period.
    B)
    A Subpart B system supplier that serves 500 to 3,300 persons must
    monitor quarterly at two distribution system monitoring locations
    during each monitoring period.
    C)
    A Subpart B system supplier that serves 3,301 to 9,999 persons
    must monitor quarterly at two distribution system monitoring
    locations during each monitoring period.
    D)
    A Subpart B system supplier that serves 10,000 to 49,999 persons
    must monitor quarterly at four distribution system monitoring
    locations during each monitoring period.
    E)
    A Subpart B system supplier that serves 50,000 to 249,999 persons
    must monitor quarterly at eight distribution system monitoring
    locations during each monitoring period.
    F)
    A Subpart B system supplier that serves 250,000 to 999,999
    persons must monitor quarterly at 12 distribution system
    164
    monitoring locations during each monitoring period.
    G)
    A Subpart B system supplier that serves 1,000,000 to 4,999,999
    persons must monitor quarterly at 16 distribution system
    monitoring locations during each monitoring period.
    H)
    A Subpart B system supplier that serves 5,000,000 or more persons
    must monitor quarterly at 20 distribution system monitoring
    locations during each monitoring period.
    I)
    A groundwater system supplier that serves fewer than 500 persons
    must monitor annually at two distribution system monitoring
    locations during each monitoring period.
    J)
    A groundwater system supplier that serves 500 to 9,999 persons
    must monitor annually at two distribution system monitoring
    locations during each monitoring period.
    K)
    A groundwater system supplier that serves 10,000 to 99,999
    persons must monitor quarterly at four distribution system
    monitoring locations during each monitoring period.
    L)
    A groundwater system supplier that serves 100,000 to 499,999
    persons must monitor quarterly at six distribution system
    monitoring locations during each monitoring period.
    M)
    A groundwater system supplier that serves 500,000 or more
    persons must monitor quarterly at eight distribution system
    monitoring locations during each monitoring period.
    N)
    The supplier must monitor during month of highest DBP
    concentrations.
    O)
    A supplier on quarterly monitoring must take dual sample sets
    every 90 days at each monitoring location, except for a Subpart B
    system supplier that serves 500 to 3,300. A supplier on annual
    monitoring or a Subpart B system supplier that serves 500 to 3,300
    is required to take individual TTHM and HAA5 samples (instead
    of a dual sample set) at the locations with the highest TTHM and
    HAA5 concentrations, respectively. Only one location with a dual
    sample set per monitoring period is needed if the highest TTHM
    and HAA5 concentrations occur at the same location (and month,
    if monitored annually).
    3)
    If a supplier is an undisinfected system that begins using a disinfectant
    other than UV light after the dates set forth in Subpart W of this Part for
    165
    complying with the IDSE requirements, the supplier must consult with the
    Agency to identify compliance monitoring locations for this Subpart Y.
    The supplier must then develop a monitoring plan pursuant to Section
    611.972 that includes those monitoring locations.
    b)
    Analytical methods. A supplier must use an approved method listed in Section
    611.381 for TTHM and HAA5 analyses in this Subpart Y. Analyses must be
    conducted by laboratories that have received certification by USEPA or the
    Agency as specified in Section 611.381.
    BOARD NOTE: Derived from 40 CFR 141.621 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.972
    Subpart Y Monitoring Plan
    a)
    Development of a monitoring plan.
    1)
    A supplier must develop and implement a monitoring plan that it must
    keep on file for Agency and public review. The monitoring plan must
    contain the following elements, and it must be complete no later than the
    date when the supplier conducts its initial monitoring pursuant to this
    Subpart Y:
    A)
    The monitoring locations;
    B)
    The monitoring dates;
    C)
    The compliance calculation procedures; and
    D)
    The monitoring plans for any other systems in the combined
    distribution system if the Agency has reduced monitoring
    requirements pursuant to Section 611.161.
    2)
    If the supplier was not required to submit an IDSE report pursuant to
    either Section 611.921 or Section 611.922, and it does not have sufficient
    Subpart I monitoring locations to identify the required number of Subpart
    Y compliance monitoring locations indicated in Section 611.925(b), the
    supplier must identify additional locations by alternating selection of
    locations representing high TTHM levels and high HAA5 levels until the
    required number of compliance monitoring locations have been identified.
    The supplier must also provide the rationale for identifying the locations
    as having high levels of TTHM or HAA5. If the supplier has more
    Subpart I monitoring locations than required for Subpart Y compliance
    monitoring in Section 611.925(b), it must identify which locations it will
    use for Subpart Y compliance monitoring by alternating selection of
    166
    locations representing high TTHM levels and high HAA5 levels until the
    required number of Subpart Y compliance monitoring locations have been
    identified.
    b)
    A Subpart B system supplier that serves more than 3,300 people must submit a
    copy of its monitoring plan to the Agency prior to the date it conducts its initial
    monitoring pursuant to this Subpart Y, unless the supplier’s IDSE report
    submitted pursuant to Subpart W of this Part contains all the information required
    by this Section.
    c)
    After consultation with the Agency regarding the need for and appropriateness of
    changes and issuance of a SEP pursuant to Section 611.110 that provides for the
    changes, a supplier may revise its monitoring plan to reflect changes in treatment,
    distribution system operations and layout (including new service areas), or other
    factors that may affect TTHM or HAA5 formation, or for Agency-approved
    reasons. If the supplier changes monitoring locations, the supplier must replace
    existing compliance monitoring locations with the lowest LRAA with new
    locations that reflect the current distribution system locations with expected high
    TTHM or HAA5 levels. The Agency may, by a SEP issued pursuant to Section
    611.110, also require modifications in the supplier’s monitoring plan. If a
    supplier is a Subpart B system supplier that serves more than 3,300 people, it
    must submit a copy of its modified monitoring plan to the Agency prior to the
    date when it is required to comply with the revised monitoring plan.
    BOARD NOTE: Derived from 40 CFR 141.622 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.973
    Reduced Monitoring
    a)
    A supplier may reduce monitoring to the level specified in the applicable of
    subsections (a)(1) through (a)(13) of this Section, subject to the limitation of
    subsection (a)(14) of this Section, any time the LRAA is 0.040 mg/ℓ or less for
    TTHM and 0.030 mg/ℓ or less for HAA5 at all monitoring locations. The
    supplier may only use data collected pursuant to the provisions of this Subpart Y
    or pursuant to Subpart I of this Part to qualify for reduced monitoring. In
    addition, the source water annual average TOC level, before any treatment, must
    be 4.0 mg/ℓ or less at each treatment plant treating surface water or groundwater
    under the direct influence of surface water, based on monitoring conducted
    pursuant to either Section 611.382(b)(1)(C) or Section 611.382(d).
    1)
    A Subpart B system supplier that serves fewer than 500 persons may not
    qualify for reduced monitoring.
    2)
    A Subpart B system supplier that serves 500 to 3,300 persons qualifies for
    reduced monitoring to a minimum of one TTHM sample collected
    167
    annually from the location and during the quarter with the highest single
    TTHM measurement and one HAA5 sample collected annually from the
    location and during the quarter with the highest single HAA5
    measurement, with the two samples collected as one dual sample set if the
    highest TTHM and HAA5 measurements occurred at the same location
    and during the same quarter.
    3)
    A Subpart B system supplier that serves 3,301 to 9,999 persons qualifies
    for reduced monitoring to a minimum of one dual sample set collected
    annually for TTHM from the location and during the quarter with the
    highest single TTHM measurement and one dual sample set collected
    annually for HAA5 from the location and during the quarter with the
    highest single HAA5 measurement.
    4)
    A Subpart B system supplier that serves 10,000 to 49,999 persons
    qualifies for reduced monitoring to a minimum of two dual sample sets
    collected quarterly from the locations with the highest TTHM and HAA5
    LRAAs.
    5)
    A Subpart B system supplier that serves 50,000 to 249,999 persons
    qualifies for reduced monitoring to a minimum of four dual sample sets
    collected quarterly from the locations with the two highest TTHM and two
    HAA5 LRAAs.
    6)
    A Subpart B system supplier that serves 250,000 to 999,999 persons
    qualifies for reduced monitoring to a minimum of six dual sample sets
    collected quarterly from the locations with the three highest TTHM and
    three HAA5 LRAAs.
    7)
    A Subpart B system supplier that serves 1,000,000 to 4,999,999 persons
    qualifies for reduced monitoring to a minimum of eight dual sample sets
    collected quarterly from the locations with the four highest TTHM and
    four HAA5 LRAAs.
    8)
    A Subpart B system supplier that serves more than 5,000,000 persons
    qualifies for reduced monitoring to a minimum of 10 dual sample sets
    collected quarterly from the locations with the five highest TTHM and
    five HAA5 LRAAs.
    9)
    A groundwater system supplier that serves fewer than 500 persons
    qualifies for reduced monitoring to a minimum of one TTHM sample
    collected triennially from the location and during the quarter with the
    highest single TTHM measurement and one HAA5 sample collected
    annually from the location and during the quarter with the highest single
    HAA5 measurement, with the two samples collected as one dual sample
    set if the highest TTHM and HAA5 measurements occurred at the same
    168
    location and during the same quarter.
    10)
    A groundwater system supplier that serves 500 to 9,999 persons qualifies
    for reduced monitoring to a minimum of one TTHM sample collected
    annually from the location and during the quarter with the highest single
    TTHM measurement and one HAA5 sample collected annually from the
    location and during the quarter with the highest single HAA5
    measurement, with the two samples collected as one dual sample set if the
    highest TTHM and HAA5 measurements occurred at the same location
    and during the same quarter.
    11)
    A groundwater system supplier that serves 10,000 to 99,999 persons
    qualifies for reduced monitoring to a minimum of one TTHM dual sample
    set collected annually from the location and during the quarter with the
    highest single TTHM measurement and one HAA5 dual sample set
    collected annually from the location and during the quarter with the
    highest single HAA5 measurement.
    12)
    A groundwater system supplier that serves 100,000 to 499,999 persons
    qualifies for reduced monitoring to a minimum of two dual sample sets
    collected quarterly from the locations with the highest TTHM and highest
    HAA5 LRAAs.
    13)
    A groundwater system supplier that serves more than 500,000 persons
    qualifies for reduced monitoring to a minimum of four dual sample sets
    collected quarterly from the two locations with the highest TTHM and two
    highest HAA5 LRAAs.
    14)
    A supplier on quarterly monitoring must take dual sample sets every 90
    days.
    b)
    The supplier may remain on reduced monitoring as long as the TTHM LRAA
    does not exceed 0.040 mg/ℓ and the HAA5 LRAA does not exceed 0.030 mg/ℓ at
    each monitoring location (for a supplier with quarterly reduced monitoring) or
    each TTHM sample does not exceed 0.060 mg/ℓ and each HAA5 sample does not
    exceed 0.045 mg/ℓ (for a supplier with annual or less frequent monitoring). In
    addition, the source water annual average TOC level, before any treatment, must
    not exceed 4.0 mg/ℓ at each treatment plant treating surface water or groundwater
    under the direct influence of surface water, based on monitoring conducted
    pursuant to either Section 611.382(b)(1)(C) or (d).
    c)
    If the LRAA based on quarterly monitoring at any monitoring location exceeds
    either 0.040 mg/ℓ for TTHM or 0.030 mg/ℓ for HAA5, if the annual (or less
    frequent) sample at any location exceeds either 0.060 mg/ℓ for TTHM or 0.045
    mg/ℓ for HAA5, or if the source water annual average TOC level, before any
    treatment, exceeds 4.0 mg/ℓ at any treatment plant treating surface water or
    169
    groundwater under the direct influence of surface water, the supplier must resume
    routine monitoring pursuant to Section 611.971 or begin increased monitoring if
    Section 611.975 applies.
    d)
    The Agency may return a supplier to routine monitoring by a SEP issued pursuant
    to Section 611.110.
    BOARD NOTE: Derived from 40 CFR 141.623 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.974
    Additional Requirements for Consecutive Systems
    If a supplier has a consecutive system that does not add a disinfectant but which delivers water
    that has been treated with a primary or residual disinfectant other than ultraviolet light, it must
    comply with the analytical and monitoring requirements for chlorine and chloramines in Sections
    611.381(c) and 611.382(c)(1) and with the compliance requirements in Section 611.383(c)(1)
    beginning April 1, 2009, unless the supplier is required to comply earlier by the Agency, and the
    supplier must report monitoring results pursuant to Section 611.384(c).
    BOARD NOTE: Derived from 40 CFR 141.624 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.975
    Conditions Requiring Increased Monitoring
    a)
    If a supplier is required to monitor at a particular location annually or less
    frequently than annually pursuant to Section 611.971 or Section 611.973, it must
    increase monitoring to dual sample sets once per quarter (taken every 90 days) at
    all locations if a TTHM sample exceeds 0.080 mg/ℓ or an HAA5 sample exceeds
    0.060 mg/ℓ at any location.
    b)
    A supplier is in violation of the MCL when the LRAA exceeds the Subpart Y
    MCLs in Section 611.312(b)(2), calculated based on four consecutive quarters of
    monitoring (or the LRAA calculated based on fewer than four quarters of data if
    the MCL would be exceeded regardless of the monitoring results of subsequent
    quarters). The supplier is in violation of the monitoring requirements for each
    quarter that a monitoring result would be used in calculating an LRAA if it fails
    to monitor.
    c)
    A supplier may return to routine monitoring once it has conducted increased
    monitoring for at least four consecutive quarters, and the LRAA for every
    monitoring location does not exceed 0.060 mg/ℓ for TTHM and 0.045 mg/ℓ for
    HAA5.
    BOARD NOTE: Derived from 40 CFR 141.625 (2006).
    170
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.976
    Operational Evaluation Levels
    a)
    A supplier has exceeded the operational evaluation level at any monitoring
    location where the sum of the two previous quarters’ TTHM results plus twice the
    current quarter’s TTHM result, divided by four to determine an average, exceeds
    0.080 mg/ℓ, or where the sum of the two previous quarters’ HAA5 results plus
    twice the current quarter’s HAA5 result, divided by four to determine an average,
    exceeds 0.060 mg/ℓ.
    b)
    Effects of exceeding the operational evaluation level.
    1)
    If a supplier exceeds the operational evaluation level, the supplier must
    conduct an operational evaluation and submit a written report of the
    evaluation to the Agency no later than 90 days after being notified of the
    analytical result that causes it to exceed the operational evaluation level.
    The written report must be made available to the public upon request.
    2)
    The supplier’s operational evaluation must include an examination of
    system treatment and distribution operational practices, including storage
    tank operations, excess storage capacity, distribution system flushing,
    changes in sources or source water quality, and treatment changes or
    problems that may contribute to TTHM and HAA5 formation and what
    steps could be considered to minimize future exceedences.
    A)
    A supplier may request and the Agency may allow the supplier to
    limit the scope of its evaluation if the supplier is able to identify
    the cause of the operational evaluation level exceedence.
    B)
    A supplier’s request to limit the scope of the evaluation does not
    extend the schedule in subsection (b)(1) of this Section for
    submitting the written report. The Agency must approve this
    limited scope of evaluation in writing, and the supplier must keep
    that approval with the completed report.
    BOARD NOTE: Derived from 40 CFR 141.626 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.977
    Requirements for Remaining on Reduced TTHM and HAA5 Monitoring
    Based on Subpart I Results
    A supplier may remain on reduced monitoring after the applicable dates identified in Section
    611.970(c) for compliance with this Subpart Y only if the supplier fulfills each of the
    171
    requirements set forth in subsections (a) through (c) of this Section, subject to the limitations of
    subsection (d) of this Section:
    a)
    The supplier qualifies for a 40/30 certification pursuant to Section 611.923 or it
    has received a very small system waiver pursuant to Section 611.924;
    b)
    The supplier meets the reduced monitoring criteria set forth in Section
    611.973(a); and
    c)
    The supplier does not change or add monitoring locations from those used for
    compliance monitoring under Subpart I of this Part.
    d)
    If the supplier’s monitoring locations pursuant to this Subpart Y differ from its
    monitoring locations pursuant to Subpart I of this Part, the supplier may not
    remain on reduced monitoring after the dates identified in Section 611.970(c) for
    the purposes of compliance with this Subpart Y.
    BOARD NOTE: Derived from 40 CFR 141.627 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.978
    Requirements for Remaining on Increased TTHM and HAA5 Monitoring
    Based on Subpart I Results
    If a supplier was on increased monitoring pursuant to Section 611.382(b)(1), it must remain on
    increased monitoring until it qualifies for a return to routine monitoring pursuant to Section
    611.975(c). The supplier must conduct increased monitoring pursuant to Section 611.975 at the
    monitoring locations in the monitoring plan developed pursuant to Section 611.972 beginning at
    the applicable date identified in Section 611.970(c) for compliance with this Subpart Y, and it
    must remain on increased monitoring until the supplier qualifies for a return to routine
    monitoring pursuant to Section 611.975(c).
    BOARD NOTE: Derived from 40 CFR 141.628 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.979
    Reporting and Recordkeeping Requirements
    a)
    Reporting.
    1)
    A supplier must report the following information to the Agency within 10
    days after the end of any quarter in which monitoring is required for each
    monitoring location:
    A)
    The number of samples taken during the last quarter;
    172
    B)
    The date and results of each sample taken during the last quarter;
    C)
    The arithmetic average of quarterly results for the last four quarters
    for each monitoring location (LRAA), beginning at the end of the
    fourth calendar quarter that follows the compliance date and at the
    end of each subsequent quarter. If the LRAA calculated based on
    fewer than four quarters of data would cause the MCL to be
    exceeded regardless of the monitoring results of subsequent
    quarters, the supplier must report this information to the Agency as
    part of the first report due following the compliance date or
    anytime thereafter that this determination is made. If the supplier
    is required to conduct monitoring at a frequency that is less than
    quarterly, it must make compliance calculations beginning with the
    first compliance sample taken after the compliance date, unless the
    supplier is required to conduct increased monitoring pursuant to
    Section 611.975;
    D)
    A statement whether, based on Section 611.312(b)(2) and this
    Subpart Y, the MCL was violated at any monitoring location; and
    E)
    Any operational evaluation levels that were exceeded during the
    quarter and, if so, the location and date, and the calculated TTHM
    and HAA5 levels.
    2)
    If a supplier is a Subpart B system supplier that seeks to qualify for or
    remain on reduced TTHM and HAA5 monitoring, it must report the
    following source water TOC information for each treatment plant that
    treats surface water or groundwater under the direct influence of surface
    water to the Agency within 10 days after the end of any quarter in which
    monitoring is required:
    A)
    The number of source water TOC samples taken each month
    during last quarter;
    B)
    The date and result of each sample taken during last quarter;
    C)
    The arithmetic average of monthly samples taken during the last
    quarter or the result of the quarterly sample;
    D)
    The running annual average (RAA) of quarterly averages from the
    past four quarters; and
    E)
    Whether the RAA exceeded 4.0 mg/ℓ.
    3)
    The Agency may, by a SEP issued pursuant to Section 611.110, choose to
    perform calculations and determine whether the MCL was exceeded or the
    173
    system is eligible for reduced monitoring in lieu of having the system
    report that information pursuant to this Section.
    b)
    Recordkeeping. A supplier must retain any Subpart Y monitoring plans and the
    supplier’s Subpart Y monitoring results as required by Section 611.860.
    BOARD NOTE: Derived from 40 CFR 141.629 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    SUBPART Z: ENHANCED TREATMENT FOR CRYPTOSPORIDIUM
    Section 611.1000
    General Requirements
    a)
    The requirements of this Subpart Z are NPDWRs. The regulations in this Subpart
    Z establish or extend treatment technique requirements in lieu of maximum
    contaminant levels for Cryptosporidium. These requirements are in addition to
    requirements for filtration and disinfection in Subparts B, R, and X of this Part.
    b)
    Applicability. The requirements of this Subpart Z apply to all Subpart B systems,
    which are PWSs supplied by a surface water source and PWSs supplied by a
    groundwater source under the direct influence of surface water.
    1)
    A wholesale system supplier, as defined in Section 611.102, must comply
    with the requirements of this Subpart Z based on the population of the
    largest system in the combined distribution system.
    2)
    The requirements of this Subpart Z for filtered system suppliers apply to a
    supplier required by NPDWRs to provide filtration treatment, whether or
    not the supplier is currently operating a filtration system.
    3)
    The requirements of this Subpart Z for an unfiltered system supplier apply
    only to an unfiltered system supplier that timely met and has continued to
    meet the filtration avoidance criteria in Subparts B, R, and X of this Part,
    as applicable.
    c)
    Requirements. A supplier subject to this Subpart Z must comply with the
    following requirements:
    1)
    The supplier must conduct an initial and a second round of source water
    monitoring for each plant that treats a surface water or groundwater under
    the direct influence of surface water source. This monitoring may include
    sampling for Cryptosporidium, E. coli, and turbidity as described in
    Sections 611.1001 through 611.1006, to determine what level, if any, of
    additional Cryptosporidium treatment the supplier must provide.
    174
    2)
    The supplier that plans to make a significant change to its disinfection
    practice must develop disinfection profiles and calculate disinfection
    benchmarks, as described in Sections 611.1008 through 611.1009.
    3)
    A filtered system supplier must determine its Cryptosporidium treatment
    bin classification as described in Section 611.1010, and provide additional
    treatment for Cryptosporidium, if required, as described in Section
    611.1011. An unfiltered system supplier must provide treatment for
    Cryptosporidium as described in Section 611.1012. A filtered or
    unfiltered system supplier must implement Cryptosporidium treatment
    according to the schedule in Section 611.1013.
    4)
    A supplier whose system has uncovered finished water storage facilities
    must comply with the requirements to cover the facility or treat the
    discharge from the facility as described in Section 611.1014.
    5)
    A supplier required to provide additional treatment for Cryptosporidium
    must implement microbial toolbox options that are designed and operated
    as described in Sections 611.1015 through 611.1020.
    6)
    The supplier must comply with the applicable recordkeeping and reporting
    requirements described in Sections 611.1021 and 611.1022.
    7)
    The supplier must address significant deficiencies identified in sanitary
    surveys performed by USEPA or the Agency, as described in Section
    611.1023.
    BOARD NOTE: Derived from 40 CFR 141.700 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1001
    Source Water Monitoring Requirements: Source Water Monitoring
    a)
    Initial round of source water monitoring. A supplier must conduct the following
    monitoring on the schedule in subsection (c) of this Section, unless it meets the
    monitoring exemption criteria in subsection (d) of this Section.
    1)
    A filtered system supplier that serves 10,000 or more people must sample
    its source water for Cryptosporidium, E. coli, and turbidity at least
    monthly for 24 months.
    2)
    An unfiltered system supplier that serves 10,000 or more people must
    sample its source water for Cryptosporidium at least monthly for 24
    months.
    3)
    Smaller system suppliers monitoring for E. coli.
    175
    A)
    A filtered system supplier that serves fewer than 10,000 people
    must sample its source water for E. coli at least once every two
    weeks for 12 months.
    B)
    A filtered system supplier that serves fewer than 10,000 people
    may avoid E. coli monitoring if the system notifies the Agency that
    it will monitor for Cryptosporidium as described in subsection
    (a)(4) of this Section. The system must notify the Agency no later
    than three months prior to the date before which the system is
    otherwise required to start E. coli monitoring pursuant to Section
    611.1001(c).
    4)
    Smaller system suppliers monitoring for Cryptosporidium. A filtered
    system supplier that serves fewer than 10,000 people must sample its
    source water for Cryptosporidium at least twice per month for 12 months
    or at least monthly for 24 months if it meets any of the conditions set forth
    in subsections (a)(4)(A) through (a)(4)(C) of this Section, subject to the
    limitations of subsection (a)(4)(D) of this Section, based on monitoring
    conducted pursuant to subsection (a)(3) of this Section.
    A)
    For a supplier that uses a lake or reservoir source, the annual mean
    E. coli concentration is greater than 10 E. coli/100 mℓ.
    B)
    For a supplier that uses a flowing stream source, the annual mean
    E. coli concentration is greater than 50 E. coli/ 100 mℓ.
    C)
    The supplier does not conduct E. coli monitoring as described in
    subsection (a)(3) of this Section.
    D)
    A supplier that uses groundwater under the direct influence of
    surface water must comply with the requirements of subsection
    (a)(4) of this Section based on the E. coli level that applies to the
    nearest surface water body. If no surface water body is nearby, the
    system must comply based on the requirements that apply to a
    supplier that uses a lake or reservoir source.
    5)
    For a filtered system supplier that serves fewer than 10,000 people, the
    Agency may, by a SEP issued pursuant to Section 611.110, approve
    monitoring for an indicator other than E. coli pursuant to subsection (a)(3)
    of this Section. The Agency may also, by a SEP issued pursuant to
    Section 611.110, approve an alternative to the E. coli concentration in
    subsection (a)(4)(A), (a)(4)(B) or (a)(4)(D) of this Section to trigger
    Cryptosporidium monitoring. This approval by the Agency must be
    provided to the supplier in writing, and it must include the basis for the
    Agency’s determination that the alternative indicator or trigger level will
    176
    provide a more accurate identification of whether a system will exceed the
    Bin 1 Cryptosporidium level set forth in Section 611.1010.
    6)
    An unfiltered system supplier that serves fewer than 10,000 people must
    sample its source water for Cryptosporidium at least twice per month for
    12 months or at least monthly for 24 months.
    7)
    A supplier may sample more frequently than required by this Section if
    the sampling frequency is evenly spaced throughout the monitoring
    period.
    b)
    Second round of source water monitoring. A supplier must conduct a second
    round of source water monitoring that meets the requirements for monitoring
    parameters, frequency, and duration described in subsection (a) of this Section,
    unless it meets the monitoring exemption criteria in subsection (d) of this Section.
    The supplier must conduct this monitoring on the schedule set forth in subsection
    (c) of this Section.
    c)
    Monitoring schedule. A supplier must begin the monitoring required in
    subsections (a) and (b) of this Section no later than the month beginning with the
    applicable date listed in subsections (c)(1) through (c)(5) of this Section.
    1)
    A supplier that serves 100,000 or more persons must begin the first round
    of source water monitoring no later than the month beginning October 1,
    2006, and it must begin the second round of source water monitoring no
    later than the month beginning April 1, 2015.
    2)
    A supplier that serves 50,000 to 99,999 persons must begin the first round
    of source water monitoring no later than the month beginning April 1,
    2007, and it must begin the second round of source water monitoring no
    later than the month beginning October 1, 2015.
    3)
    A supplier that serves 10,000 to 49,999 persons must begin the first round
    of source water monitoring no later than the month beginning April 1,
    2008, and it must begin the second round of source water monitoring no
    later than the month beginning October 1, 2016.
    4)
    A supplier that serves fewer than 10,000 persons, that is a filtered system
    supplier, and which monitors for E. coli must begin the first round of
    source water monitoring no later than the month beginning October 1,
    2008, and it must begin the second round of source water monitoring no
    later than the month beginning October 1, 2017.
    5)
    A supplier that serves fewer than 10,000 persons, that is an unfiltered
    system supplier, or that is a filtered system supplier which meets the
    conditions of subsection (a)(4) of this Section, and which monitors for
    177
    Cryptosporidium, must begin the first round of source water monitoring
    no later than the month beginning April 1, 2010, and it must begin the
    second round of source water monitoring no later than the month
    beginning April 1, 2019.
    d)
    Monitoring avoidance.
    1)
    A filtered system supplier is not required to conduct source water
    monitoring pursuant to this Subpart Z if the system will provide a total of
    at least 5.5-log of treatment for Cryptosporidium, equivalent to meeting
    the treatment requirements of Bin 4 in Section 611.1011.
    2)
    An unfiltered system supplier is not required to conduct source water
    monitoring pursuant to this Subpart Z if the system will provide a total of
    at least 3-log Cryptosporidium inactivation, equivalent to meeting the
    treatment requirements for an unfiltered system supplier with a mean
    Cryptosporidium concentration of greater than 0.01 oocysts/ℓ in Section
    611.1012.
    3)
    If a supplier chooses to provide the level of treatment set forth in
    subsection (d)(1) or (d)(2) of this Section, as applicable, rather than start
    source water monitoring, it must notify the Agency in writing no later than
    the date on which the system is otherwise required to submit a sampling
    schedule for monitoring pursuant to Section 611.1002. Alternatively, a
    supplier may choose to stop sampling at any point after it has initiated
    monitoring if it notifies the Agency in writing that it will provide this level
    of treatment. The supplier must install and operate technologies to
    provide this level of treatment before the applicable treatment compliance
    date set forth in Section 611.1013.
    e)
    Plants operating only part of the year. A supplier that has a Subpart B plant that
    operates for only part of the year must conduct source water monitoring in
    accordance with this Subpart Z, but with the following modifications:
    1)
    The supplier must sample its source water only during the months that the
    plant operates, unless the Agency, by a SEP issued pursuant to Section
    611.110, specifies another monitoring period based on plant operating
    practices.
    2)
    A supplier with plants that operate less than six months per year and
    which monitors for Cryptosporidium must collect at least six
    Cryptosporidium samples per year during each of two years of monitoring.
    Samples must be evenly spaced throughout the period during which the
    plant operates.
    f)
    New sources and new systems.
    178
    1)
    New sources. A supplier that begins using a new source of surface water
    or groundwater under the direct influence of surface water after the
    supplier is required to begin monitoring pursuant to subsection (c) of this
    Section must monitor the new source on a schedule that the Agency has
    approved by a SEP issued pursuant to Section 611.110. Source water
    monitoring must meet the requirements of this Subpart Z. The supplier
    must also meet the bin classification and Cryptosporidium treatment
    requirements of Sections 611.1010 and 611.1011 or Section 611.1012, as
    applicable, for the new source on a schedule that the Agency has approved
    by a SEP issued pursuant to Section 611.110.
    2)
    The requirements of Section 611.1001(f) apply to a Subpart B system
    supplier that begins operation after the applicable monitoring start date set
    forth in subsection (c) of this Section.
    3)
    The supplier must begin a second round of source water monitoring no
    later than six years following initial bin classification pursuant to Section
    611.1010 or determination of the mean Cryptosporidium level pursuant to
    Section 611.1012.
    g)
    Failure to collect any source water sample required under this Section in
    accordance with the sampling schedule, sampling location, analytical method,
    approved laboratory, and reporting requirements of Sections 611.1002 through
    611.1006 is a monitoring violation.
    h)
    Grandfathering monitoring data. A supplier may use (grandfather) monitoring
    data collected prior to the applicable monitoring start date in subsection (c) of this
    Section to meet the initial source water monitoring requirements in subsection (a)
    of this Section. Grandfathered data may substitute for an equivalent number of
    months at the end of the monitoring period. All data submitted pursuant to this
    subsection must meet the requirements set forth in Section 611.1007.
    BOARD NOTE: Derived from 40 CFR 141.701 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1002
    Source Water Monitoring Requirements: Sampling Schedules
    a)
    A supplier required to conduct source water monitoring pursuant to Section
    611.1001 must submit a sampling schedule that specifies the calendar dates on
    which it will collect each required sample.
    1)
    The supplier must submit sampling schedules no later than three months
    prior to the applicable date listed in Section 611.1001(c) for each round of
    required monitoring.
    179
    2)
    Submission of the sampling schedule to USEPA.
    A)
    A supplier that serves 10,000 or more people must submit its
    sampling schedule for the initial round of source water monitoring
    pursuant to Section 611.1001(a) to USEPA electronically at
    https://intranet.epa.gov/lt2/.
    B)
    If a supplier is unable to submit the sampling schedule
    electronically, the supplier may use an alternative approach for
    submitting the sampling schedule that USEPA approves.
    3)
    A supplier that serves fewer than 10,000 people must submit to the
    Agency its sampling schedules for the initial round of source water
    monitoring Section 611.1001(a).
    4)
    A supplier must submit to the Agency sampling schedules for the second
    round of source water monitoring required by Section 611.1001(b).
    5)
    If USEPA or the Agency does not respond to a supplier regarding its
    sampling schedule, the supplier must sample at the reported schedule.
    b)
    A supplier must collect samples within two days before or two days after the
    dates indicated in its sampling schedule (i.e., within a five-day period around the
    schedule date) unless one of the conditions of subsection (b)(1) or (b)(2) of this
    Section applies.
    1)
    If an extreme condition or situation exists that may pose danger to the
    sample collector, or one that cannot be avoided and which causes the
    supplier to be unable to sample in the scheduled five-day period, the
    supplier must sample as close to the scheduled date as is feasible, unless
    the Agency approves an alternative sampling date by a SEP issued
    pursuant to Section 611.110. The supplier must submit an explanation for
    the delayed sampling date to the Agency concurrent with the shipment of
    the sample to the laboratory.
    2)
    Replacement samples.
    A)
    If a supplier is unable to report a valid analytical result for a
    scheduled sampling date due to equipment failure; loss of or
    damage to the sample; failure to comply with the analytical
    method requirements, including the quality control requirements in
    Section 611.1004; or the failure of an approved laboratory to
    analyze the sample, then the supplier must collect a replacement
    sample.
    180
    B)
    The supplier must collect the replacement sample not later than 21
    days after receiving information that an analytical result cannot be
    reported for the scheduled date, unless the supplier demonstrates
    that collecting a replacement sample within this time frame is not
    feasible or the Agency approves an alternative resampling date by
    a SEP issued pursuant to Section 611.110. The supplier must
    submit an explanation for the delayed sampling date to the Agency
    concurrent with the shipment of the sample to the laboratory.
    c)
    A supplier that fails to meet the criteria of subsection (b) of this Section for any
    source water sample required pursuant to Section 611.1001 must revise its
    sampling schedule to add dates for collecting all missed samples. A supplier must
    submit the revised schedule to the Agency for approval prior to collecting the
    missed samples.
    BOARD NOTE: Derived from 40 CFR 141.702 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1003
    Source Water Monitoring Requirements: Sampling Locations
    a)
    A supplier required to conduct source water monitoring pursuant to Section
    611.1001 must collect samples for each plant that treats a surface water or
    groundwater under the direct influence of surface water source. Where multiple
    plants draw water from the same influent, such as the same pipe or intake, the
    Agency may, by a SEP issued pursuant to Section 611.110, approve one set of
    monitoring results to be used to satisfy the requirements of Section 611.1001 for
    all of the plants.
    b)
    Source water sampling.
    1)
    A supplier must collect source water samples prior to chemical treatment,
    such as coagulants, oxidants, and disinfectants, unless the supplier meets
    the condition of subsection (b)(2) of this Section.
    2)
    The Agency may, by a SEP issued pursuant to Section 611.110, approve a
    supplier to collect a source water sample after chemical treatment. To
    grant this approval, the Agency must determine that collecting a sample
    prior to chemical treatment is not feasible for the supplier and that the
    chemical treatment is unlikely to have a significant adverse effect on the
    analysis of the sample.
    c)
    A supplier that recycles filter backwash water must collect source water samples
    prior to the point of filter backwash water addition.
    d)
    Bank filtration.
    181
    1)
    A supplier that receives Cryptosporidium treatment credit for bank
    filtration pursuant to Section 611.743(b) or Section 611.955(c)(1), as
    applicable, must collect source water samples in the surface water prior to
    bank filtration.
    2)
    A supplier that uses bank filtration as pretreatment to a filtration plant
    must collect source water samples from the well (i.e., after bank filtration).
    The use of bank filtration during monitoring must be consistent with
    routine operational practice. A supplier collecting samples after a bank
    filtration process may not receive treatment credit for the bank filtration
    pursuant to Section 611.1017(c).
    e)
    Multiple sources. A supplier with plants that use multiple water sources,
    including multiple surface water sources and blended surface water and
    groundwater sources, must collect samples as specified in subsection (e)(1) or
    (e)(2) of this Section. The use of multiple sources during monitoring must be
    consistent with routine operational practice.
    1)
    If a sampling tap is available where the sources are combined prior to
    treatment, the supplier must collect samples from the tap.
    2)
    If a sampling tap where the sources are combined prior to treatment is not
    available, the supplier must collect samples at each source near the intake
    on the same day, and it must follow either of the following procedures for
    sample analysis:
    A)
    The supplier may composite samples from each source into one
    sample prior to analysis. The volume of sample from each source
    must be weighted according to the proportion of the source in the
    total plant flow at the time the sample is collected; or
    B)
    The supplier may analyze samples from each source separately and
    calculate a weighted average of the analysis results for each
    sampling date. The weighted average must be calculated by
    multiplying the analysis result for each source by the fraction the
    source contributed to total plant flow at the time the sample was
    collected and then summing these values.
    f)
    Additional Requirements. A supplier must submit a description of its sampling
    locations to the Agency at the same time as the sampling schedule required
    pursuant to Section 611.1002. This description must address the position of the
    sampling location in relation to the supplier’s water sources and treatment
    processes, including pretreatment, points of chemical treatment, and filter
    backwash recycle. If the Agency does not respond to a supplier regarding
    sampling locations, the supplier must sample at the reported locations.
    182
    BOARD NOTE: Derived from 40 CFR 141.703 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1004
    Source Water Monitoring Requirements: Analytical Methods
    a)
    Cryptosporidium. A supplier must analyze for Cryptosporidium using USEPA
    Method 1623 (05) or USEPA Method 1622 (05), each incorporated by reference
    in Section 611.102.
    1)
    The supplier must analyze at least a 10
    ℓ
    sample or a packed pellet volume
    of at least 2 mℓ as generated by the methods listed in subsection (a) of this
    Section. A supplier unable to process a 10
    ℓ
    sample must analyze as much
    sample volume as can be filtered by two filters approved by USEPA for
    the methods listed in subsection (a) of this Section, up to a packed pellet
    volume of at least 2 mℓ.
    2)
    Matrix spike (MS) samples.
    A)
    MS samples, as required by the methods in subsection (a) of this
    Section, must be spiked and filtered by a laboratory approved for
    Cryptosporidium analysis pursuant to Section 611.1005.
    B)
    If the volume of the MS sample is greater than 10
    ℓ
    , the supplier
    may filter all but 10
    ℓ
    of the MS sample in the field, and ship the
    filtered sample and the remaining 10
    ℓ
    of source water to the
    laboratory. In this case, the laboratory must spike the remaining
    10
    ℓ
    of water and filter it through the filter used to collect the
    balance of the sample in the field.
    3)
    Flow cytometer-counted spiking suspensions must be used for MS
    samples and ongoing precision and recovery samples.
    b)
    E. coli. A supplier must use methods for enumeration of E. coli in source water
    approved in 40 CFR 136.3(a), incorporated by reference in Section 611.102.
    1)
    The time from sample collection to initiation of analysis may not exceed
    30 hours, unless the supplier meets the condition of subsection (b)(2) of
    this Section.
    2)
    The Agency may, by a SEP issued pursuant to Section 611.110, approve
    on a case-by-case basis the holding of an E. coli sample for up to 48 hours
    between sample collection and initiation of analysis if it determines that
    analyzing an E. coli sample within 30 hours is not feasible. E. coli
    samples held between 30 to 48 hours must be analyzed by the
    183
    Autoanalysis Colilert System reagent version of Standard Methods, 18th,
    19th, or 20th ed., Method 9223 B, as listed in 40 CFR 136.3(a),
    incorporated by reference in Section 611.102.
    3)
    A supplier must maintain the temperature of its samples between 0ºC and
    10ºC during storage and transit to the laboratory.
    c)
    Turbidity. A supplier must use methods for turbidity measurement approved in
    Section 611.531(a).
    BOARD NOTE: Derived from 40 CFR 141.704 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1005
    Source Water Monitoring Requirements: Approved Laboratories
    a)
    Cryptosporidium. A supplier must have Cryptosporidium samples analyzed by a
    laboratory that is approved under USEPA’s Laboratory Quality Assurance
    Evaluation Program for Analysis of Cryptosporidium in Water or a laboratory that
    has been certified for Cryptosporidium analysis by the Agency.
    b)
    E. coli. Any laboratory certified by the USEPA, by the National Environmental
    Laboratory Accreditation Conference, or by the Agency for total coliform or fecal
    coliform analysis pursuant to Section 611.531 is approved for E. coli analysis
    pursuant to this Subpart Z when the laboratory uses the same technique for E. coli
    that the laboratory uses for the purposes of Section 611.531.
    c)
    Turbidity. Measurements of turbidity must be made by a party approved by the
    Agency.
    BOARD NOTE: Derived from 40 CFR 141.705 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1006
    Source Water Monitoring Requirements: Reporting Source Water
    Monitoring Results
    a)
    A supplier must report results from the source water monitoring required pursuant
    to Section 611.1001 no later than 10 days after the end of the first month
    following the month when the sample is collected.
    b)
    Submission of analytical results to USEPA.
    1)
    A supplier that serves at least 10,000 people must report the results from
    the initial source water monitoring required pursuant to Section
    611.1001(a) to USEPA electronically at https://intranet.epa.gov/lt2/.
    184
    2)
    If a supplier is unable to report monitoring results electronically, the
    supplier may use an alternative approach for reporting monitoring results
    that USEPA approves.
    c)
    A supplier that serves fewer than 10,000 people must report results from the
    initial source water monitoring required pursuant to Section 611.1001(a) to the
    Agency.
    d)
    A supplier must report results from the second round of source water monitoring
    required pursuant to Section 611.1001(b) to the Agency.
    e)
    A supplier must report the applicable information in subsections (e)(1) and (e)(2)
    of this Section for the source water monitoring required pursuant to Section
    611.1001.
    1)
    A supplier must report the data elements set forth in subsection (e)(1)(D)
    of this Section for each Cryptosporidium analysis.
    A)
    For matrix spike samples, a supplier must also report the sample
    volume spiked and estimated number of oocysts spiked. These
    data are not required for field samples.
    B)
    For samples in which less than 10
    ℓ
    is filtered or less than 100% of
    the sample volume is examined, the supplier must also report the
    number of filters used and the packed pellet volume.
    C)
    For samples in which less than 100% of sample volume is
    examined, the supplier must also report the volume of resuspended
    concentrate and volume of this resuspension processed through
    immunomagnetic separation.
    D)
    Data elements.
    i)
    The PWS ID;
    ii)
    The Facility ID;
    iii)
    The sample collection date;
    iv)
    The sample type (field or matrix spike);
    v)
    The sample volume filtered (ℓ), to nearest 1
    ∕
    4
    ℓ
    ;
    vi)
    Whether 100 percent of the filtered volume was examined;
    and
    185
    vii)
    The number of oocysts counted.
    BOARD NOTE: Subsection (e)(1)(D) is derived from unnumbered
    tabulated text in 40 CFR 141.706(e)(1) (2006).
    2)
    A supplier must report the following data elements for each E. coli
    analysis:
    A)
    The PWS ID;
    B)
    The Facility ID;
    C)
    The sample collection date;
    D)
    The analytical method number;
    E)
    The method type;
    F)
    The source type (flowing stream, lake or reservoir, groundwater
    under the direct influence of surface water);
    G)
    The E. coli count per 100 mℓ.
    H)
    The turbidity, except that a supplier which serves fewer than
    10,000 people that is not required to monitor for turbidity pursuant
    to Section 611.1001 is not required to report turbidity with its E.
    coli results.
    BOARD NOTE: Derived from 40 CFR 141.706 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1007
    Source Water Monitoring Requirements: Grandfathering Previously
    Collected Data
    a)
    Initial source monitoring and Cryptosporidium samples.
    1)
    A supplier may comply with the initial source water monitoring
    requirements of Section 611.1001(a) by grandfathering sample results
    collected before the supplier is required to begin monitoring (i.e.,
    previously collected data). To be grandfathered, the sample results and
    analysis must meet the criteria in this Section and the Agency must
    approve the use of the data by a SEP issued pursuant to Section 611.110.
    2)
    A filtered system supplier may grandfather Cryptosporidium samples to
    186
    meet the requirements of Section 611.1001(a) when the supplier does not
    have corresponding E. coli and turbidity samples. A supplier that
    grandfathers Cryptosporidium samples without E. coli and turbidity
    samples is not required to collect E. coli and turbidity samples when it
    completes the requirements for Cryptosporidium monitoring pursuant to
    Section 611.1001(a).
    b)
    E. coli sample analysis. The analysis of E. coli samples must meet the analytical
    method and approved laboratory requirements of Sections 611.1004 and
    611.1005.
    c)
    Cryptosporidium sample analysis. The analysis of Cryptosporidium samples
    must meet the criteria in this subsection (c).
    1)
    Laboratories analyzed Cryptosporidium samples using one of the
    following analytical methods:
    A)
    USEPA Method 1623 (05), incorporated by reference in Section
    611.102;
    B)
    USEPA Method 1622 (05), incorporated by reference in Section
    611.102;
    C)
    USEPA Method 1623 (01), incorporated by reference in Section
    611.102;
    D)
    USEPA Method 1622 (01), incorporated by reference in Section
    611.102;
    E)
    USEPA Method 1623 (99), incorporated by reference in Section
    611.102; or
    F)
    USEPA Method 1622 (99), incorporated by reference in Section
    611.102.
    2)
    For each Cryptosporidium sample, the laboratory analyzed at least 10
    ℓ
    of
    sample or at least 2 mℓ of packed pellet or as much volume as could be
    filtered by two filters that USEPA approved for the methods listed in
    subsection (c)(1) of this Section.
    d)
    Sampling location. The sampling location must meet the conditions in Section
    611.1003.
    e)
    Sampling frequency. Cryptosporidium samples were collected no less frequently
    than each calendar month on a regular schedule, beginning no earlier than January
    1999. Sample collection intervals may vary for the conditions specified in
    187
    Section 611.1002(b)(1) and (b)(2) if the supplier provides documentation of the
    condition when reporting monitoring results.
    1)
    The Agency may, by a SEP issued pursuant to Section 611.110, approve
    grandfathering of previously collected data where there are time gaps in
    the sampling frequency if the supplier conducts additional monitoring that
    the Agency has specified by a SEP issued pursuant to Section 611.110 to
    ensure that the data used to comply with the initial source water
    monitoring requirements of Section 611.1001(a) are seasonally
    representative and unbiased.
    2)
    A supplier may grandfather previously collected data where the sampling
    frequency within each month varied. If the Cryptosporidium sampling
    frequency varied, the supplier must follow the monthly averaging
    procedure in Section 611.1010(b)(5) or Section 611.1012(a)(3), as
    applicable, when calculating the bin classification for a filtered system
    supplier or the mean Cryptosporidium concentration for an unfiltered
    system supplier.
    f)
    Reporting monitoring results for grandfathering. A supplier that requests to
    grandfather previously collected monitoring results must report the following
    information by the applicable dates listed in this subsection. A supplier must
    report this information to the Agency.
    1)
    A supplier must report that it intends to submit previously collected
    monitoring results for grandfathering. This report must specify the
    number of previously collected results the supplier will submit, the dates
    of the first and last sample, and whether a supplier will conduct additional
    source water monitoring to meet the requirements of Section 611.1001(a).
    The supplier must report this information no later than the applicable date
    set forth in Section 611.1002.
    2)
    A supplier must report previously collected monitoring results for
    grandfathering, along with the associated documentation listed in
    subsections (f)(2)(A) through (f)(2)(D) of this Section, no later than two
    months after the applicable date listed in Section 611.1001(c).
    A)
    For each sample result, a supplier must report the applicable data
    elements in Section 611.1006.
    B)
    A supplier must certify that the reported monitoring results include
    all results that it generated during the time period beginning with
    the first reported result and ending with the final reported result.
    This applies to samples that were collected from the sampling
    location specified for source water monitoring pursuant to this
    Subpart Z, which were not spiked, and which were analyzed using
    188
    the laboratory’s routine process for the analytical methods listed in
    this Section.
    C)
    The supplier must certify that the samples were representative of a
    plant’s source waters and the source waters have not changed. It
    must report a description of the sampling locations, which must
    address the position of the sampling location in relation to its water
    sources and treatment processes, including points of chemical
    addition and filter backwash recycle.
    D)
    For Cryptosporidium samples, the laboratory or laboratories that
    analyzed the samples must provide a letter certifying that the
    quality control criteria specified in the methods listed in subsection
    (c)(1) of this Section were met for each sample batch associated
    with the reported results. Alternatively, the laboratory may
    provide bench sheets and sample examination report forms for
    each field, matrix spike, initial precision and recovery, ongoing
    precision and recovery, and method blank sample associated with
    the reported results.
    g)
    If the Agency determines that a previously collected data set submitted for
    grandfathering was generated during source water conditions that were not
    normal for the supplier, such as a drought, the Agency may, by a SEP issued
    pursuant to Section 611.110, disapprove the data. Alternatively, the Agency may,
    by a SEP issued pursuant to Section 611.110, approve the previously collected
    data if the supplier reports additional source water monitoring data, as determined
    by the Agency, to ensure that the data set used pursuant to Section 611.1010 or
    Section 611.1012 represents average source water conditions for the supplier.
    h)
    If a supplier submits previously collected data that fully meet the number of
    samples required for initial source water monitoring pursuant to Section
    611.1001(a), and some of the data are rejected due to not meeting the
    requirements of this Section, the supplier must conduct additional monitoring to
    replace rejected data on a schedule that the Agency has approved by a SEP issued
    pursuant to Section 611.110. A supplier is not required to begin this additional
    monitoring until two months after notification that data have been rejected and
    additional monitoring is necessary.
    BOARD NOTE: Derived from 40 CFR 141.707 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1008
    Disinfection Profiling and Benchmarking Requirements: Requirements
    When Making a Significant Change in Disinfection Practice
    a)
    Following the completion of initial source water monitoring pursuant to Section
    189
    611.1001(a), a supplier that plans to make a significant change to its disinfection
    practice, as defined in subsection (b) of this Section, must develop disinfection
    profiles and calculate disinfection benchmarks for Giardia lamblia and viruses, as
    described in Section 611.1009. Prior to changing the disinfection practice, the
    supplier must notify the Agency, and it must include in this notice the following
    information:
    1)
    A completed disinfection profile and disinfection benchmark for Giardia
    lamblia and viruses, as described in Section 611.1009;
    2)
    A description of the proposed change in disinfection practice; and
    3)
    An analysis of how the proposed change will affect the current level of
    disinfection.
    b)
    Significant changes to disinfection practice are defined as any of the following:
    1)
    Changes to the point of disinfection;
    2)
    Changes to the disinfectants used in the treatment plant;
    3)
    Changes to the disinfection process; or
    4)
    Any other modification identified by the Agency, by a SEP issued
    pursuant to Section 611.110, as a significant change to disinfection
    practice.
    BOARD NOTE: Derived from 40 CFR 141.708 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1009
    Disinfection Profiling and Benchmarking Requirements: Developing the
    Disinfection Profile and Benchmark
    a)
    A supplier required to develop disinfection profiles pursuant to Section 611.1008
    must follow the requirements of this Section. The supplier must monitor at least
    weekly for a period of 12 consecutive months to determine the total log
    inactivation for Giardia lamblia and viruses. If the supplier monitors more
    frequently than weekly, the monitoring frequency must be evenly spaced. A
    supplier that operates for fewer than 12 months per year must monitor weekly
    during the period of operation. A supplier must determine log inactivation for
    Giardia lamblia through the entire plant, based on the applicable CT
    99.9
    values in
    Appendix B to this Part. A supplier must determine log inactivation for viruses
    through the entire treatment plant based on a protocol approved by the Agency by
    a SEP issued pursuant to Section 611.110.
    190
    b)
    A supplier with a single point of disinfectant application prior to the entrance to
    the distribution system must conduct the monitoring in subsections (b)(1) through
    (b)(4) of this Section. A supplier with more than one point of disinfectant
    application must conduct the monitoring in subsections (b)(1) through (b)(4) of
    this Section for each disinfection segment. A supplier must monitor the
    parameters necessary to determine the total inactivation ratio, using analytical
    methods in Section 611.531.
    1)
    For a supplier using a disinfectant other than UV, the temperature of the
    disinfected water must be measured at each residual disinfectant
    concentration sampling point during peak hourly flow or at an alternative
    location approved by the Agency by a SEP issued pursuant to Section
    611.110.
    2)
    For a supplier using chlorine, the pH of the disinfected water must be
    measured at each chlorine residual disinfectant concentration sampling
    point during peak hourly flow or at an alternative location approved by the
    Agency by a SEP issued pursuant to Section 611.110.
    3)
    The disinfectant contact times (t) must be determined during peak hourly
    flow.
    4)
    The residual disinfectant concentrations (C) of the water before or at the
    first customer and prior to each additional point of disinfectant application
    must be measured during peak hourly flow.
    c)
    In lieu of conducting new monitoring pursuant to subsection (b) of this Section, a
    supplier may elect to meet the following requirements:
    1)
    A supplier that has at least one year of existing data that are substantially
    equivalent to data collected pursuant to the provisions of subsection (b) of
    this Section may use these data to develop disinfection profiles as
    specified in this Section if the supplier has neither made a significant
    change to its treatment practice nor changed sources since the data were
    collected. The supplier may develop disinfection profiles using up to
    three years of existing data.
    2)
    A supplier may use disinfection profiles developed pursuant to Section
    611.742 or Section 611.953 in lieu of developing a new profile if the
    supplier has neither made a significant change to its treatment practice nor
    changed sources since the profile was developed. A supplier that has not
    developed a virus profile pursuant to Section 611.742 or Section 611.953
    must develop a virus profile using the same monitoring data on which the
    Giardia lamblia profile is based.
    d)
    A supplier must calculate the total inactivation ratio for Giardia lamblia, as
    191
    specified in subsections (d)(1) through (d)(3) of this Section.
    1)
    A supplier using only one point of disinfectant application may determine
    the total inactivation ratio for the disinfection segment based on either of
    the following methods:
    A)
    It may determine one inactivation ratio (Ai) before or at the first
    customer during peak hourly flow; or
    B)
    It may determine successive Ai values, representing sequential
    inactivation ratios, between the point of disinfectant application
    and a point before or at the first customer during peak hourly flow.
    The supplier must calculate the total inactivation ratio by
    determining Ai for each sequence and then adding the Ai values
    together to determine the total inactivation ratio (Σ Ai).
    2)
    A supplier using more than one point of disinfectant application before the
    first customer must determine the CT value of each disinfection segment
    immediately prior to the next point of disinfectant application, or for the
    final segment, before or at the first customer, during peak hourly flow.
    The Ai value of each segment and
    Σ
    Ai must be calculated using the
    method in subsection (d)(1)(B) of this Section.
    3)
    The supplier must determine the total logs of inactivation by multiplying
    the value calculated in subsection (d)(1) or (d)(2) of this Section by 3.0.
    4)
    The supplier must calculate the log of inactivation for viruses using a
    protocol approved by the Agency by regulation or by a SEP issued
    pursuant to Section 611.110.
    e)
    A supplier must use the following procedures to calculate a disinfection
    benchmark:
    1)
    For each year of profiling data collected and calculated pursuant to
    subsections (a) through (d) of this Section, the supplier must determine the
    lowest mean monthly level of both Giardia lamblia and virus inactivation.
    A supplier must determine the mean Giardia lamblia and virus inactivation
    for each calendar month for each year of profiling data by dividing the
    sum of daily or weekly Giardia lamblia and virus log inactivation by the
    number of values calculated for that month.
    2)
    The disinfection benchmark is the lowest monthly mean value (for a
    supplier with one year of profiling data) or the mean of the lowest monthly
    mean values (for a supplier with more than one year of profiling data) of
    Giardia lamblia and virus log inactivation in each year of profiling data.
    192
    BOARD NOTE: Derived from 40 CFR 141.709 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1010
    Treatment Technique Requirements: Bin Classification for Filtered
    Suppliers
    a)
    Following completion of the initial round of source water monitoring required
    pursuant to Section 611.1001(a), a filtered system supplier must calculate an
    initial Cryptosporidium bin concentration for each plant for which monitoring
    was required. Calculation of the bin concentration must use the Cryptosporidium
    results reported pursuant to Section 611.1001(a) and must follow the appropriate
    of the procedures set forth in subsection (b) of this Section.
    b)
    Bin concentration calculation procedures.
    1)
    For a supplier that collects a total of at least 48 samples, the bin
    concentration is equal to the arithmetic mean of all sample concentrations.
    2)
    For a supplier that collects a total of at least 24 samples, but not more than
    47 samples, the bin concentration is equal to the highest arithmetic mean
    of all sample concentrations in any 12 consecutive months during which
    Cryptosporidium samples were collected.
    3)
    For a supplier that serves fewer than 10,000 people and which monitors
    for Cryptosporidium for only one year (i.e., collect 24 samples in 12
    months), the bin concentration is equal to the arithmetic mean of all
    sample concentrations.
    4)
    For a supplier with plants operating only part of the year that monitors
    fewer than 12 months per year pursuant to Section 611.1001(e), the bin
    concentration is equal to the highest arithmetic mean of all sample
    concentrations during any year of Cryptosporidium monitoring.
    5)
    If the monthly Cryptosporidium sampling frequency varies, a supplier
    must first calculate a monthly average for each month of monitoring. A
    supplier must then use these monthly average concentrations, rather than
    individual sample concentrations, in the applicable calculation for bin
    classification in subsections (b)(1) through (b)(4) of this Section.
    c)
    A filtered system supplier must determine its initial bin classification according to
    subsections (c)(1) through (c)(5), subject to the limitations of subsection (c)(6) of
    this Section, and using the Cryptosporidium bin concentration calculated pursuant
    to subsections (a) and (b) of this Section.
    1)
    For a supplier that is required to monitor for Cryptosporidium pursuant to
    193
    Section 611.1001 and which has a Cryptosporidium bin concentration of
    less than 0.075 oocysts/ℓ, the bin classification is Bin 1.
    2)
    For a supplier that is required to monitor for Cryptosporidium pursuant to
    Section 611.1001 and which has a Cryptosporidium bin concentration of
    0.075 oocysts/ℓ or more, but less than 1.0 oocysts/ℓ, the bin classification
    is Bin 2.
    3)
    For a supplier that is required to monitor for Cryptosporidium pursuant to
    Section 611.1001 and which has a Cryptosporidium bin concentration of
    1.0 oocysts/ℓ or more, but less than 3.0 oocysts/ℓ, the bin classification is
    Bin 3.
    4)
    For a supplier that is required to monitor for Cryptosporidium pursuant to
    Section 611.1001 and which has a Cryptosporidium bin concentration of
    3.0 oocysts/ℓ or more, the bin classification is Bin 4.
    5)
    For a supplier that that serves fewer than 10,000 people and which is not
    required to monitor for Cryptosporidium pursuant to Section
    611.1001(a)(4), the bin classification is Bin 1.
    6)
    The Cryptosporidium concentration is based on the applicable of the
    calculations set forth in subsection (a) or (d) of this Section.
    d)
    Following completion of the second round of source water monitoring required
    pursuant to Section 611.1001(b), a filtered system supplier must recalculate its
    Cryptosporidium bin concentration using the Cryptosporidium results reported
    pursuant to Section 611.1001(b) and following the applicable of the procedures
    set forth in subsection (b)(1) through (b)(4) of this Section. A supplier must then
    redetermine its bin classification using this bin concentration and subsection (c)
    of this Section.
    e)
    Reporting the bin classification.
    1)
    A filtered system supplier must report its initial bin classification pursuant
    to subsection (c) of this Section to the Agency for approval no later than
    six months after the supplier is required to complete initial source water
    monitoring based on the applicable schedule set forth in Section
    611.1001(c).
    2)
    A supplier must report its bin classification pursuant to subsection (d) of
    this Section to the Agency for approval no later than six months after the
    supplier is required to complete the second round of source water
    monitoring based on the applicable schedule set forth in Section
    611.1001(c).
    194
    3)
    The bin classification report to the Agency must include a summary of
    source water monitoring data and the calculation procedure used to
    determine bin classification.
    f)
    A failure to comply with the conditions of subsection (e) of this Section is a
    violation of the treatment technique requirement.
    BOARD NOTE: Derived from 40 CFR 141.710 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1011
    Treatment Technique Requirements: Filtered System Additional
    Cryptosporidium Treatment Requirements
    a)
    A filtered system supplier must provide the level of additional treatment for
    Cryptosporidium specified in subsections (a)(1) through (a)(4) of this Section
    based on its bin classification, as determined pursuant to Section 611.1010, and
    according to the applicable schedule set forth in Section 611.1013.
    1)
    If the supplier’s bin classification is Bin 1, and the supplier uses
    conventional filtration treatment (including softening) in full compliance
    with the applicable provisions of Subparts B, R, and X of this Part, no
    additional treatment is required.
    2)
    If the supplier’s bin classification is Bin 2, and the supplier uses
    conventional filtration treatment (including softening) in full compliance
    with the applicable provisions of Subparts B, R, and X of this Part, then
    the additional Cryptosporidium treatment requirements are a 1-log
    treatment.
    3)
    If the supplier’s bin classification is Bin 2, and the supplier uses direct
    filtration in full compliance with the applicable provisions of Subparts B,
    R, and X of this Part, then the additional Cryptosporidium treatment
    requirements are a 1.5-log treatment.
    4)
    If the supplier’s bin classification is Bin 2, and the supplier uses slow sand
    or diatomaceous earth filtration in full compliance with the applicable
    provisions of Subparts B, R, and X of this Part, then the additional
    Cryptosporidium treatment requirements are a 1-log treatment.
    5)
    If the supplier’s bin classification is Bin 2, and the supplier uses
    alternative filtration technologies in full compliance with the applicable
    provisions of Subparts B, R, and X of this Part, then the additional
    Cryptosporidium treatment requirements are as determined by the Agency,
    by a SEP issued pursuant to Section 611.110, such that the total
    Cryptosporidium removal and inactivation is at least 4.0-log.
    195
    6)
    If the supplier’s bin classification is Bin 3, and the supplier uses
    conventional filtration treatment (including softening) in full compliance
    with the applicable provisions of Subparts B, R, and X of this Part, then
    the additional Cryptosporidium treatment requirements are a 2-log
    treatment.
    7)
    If the supplier’s bin classification is Bin 3, and the supplier uses direct
    filtration in full compliance with the applicable provisions of Subparts B,
    R, and X of this Part, then the additional Cryptosporidium treatment
    requirements are a 2.5-log treatment.
    8)
    If the supplier’s bin classification is Bin 3, and the supplier uses slow sand
    or diatomaceous earth filtration in full compliance with the applicable
    provisions of Subparts B, R, and X of this Part, then the additional
    Cryptosporidium treatment requirements are a 2-log treatment.
    9)
    If the supplier’s bin classification is Bin 3, and the supplier uses
    alternative filtration technologies in full compliance with the applicable
    provisions of Subparts B, R, and X of this Part, then the additional
    Cryptosporidium treatment requirements are as determined by the Agency,
    by a SEP issued pursuant to Section 611.110, such that the total
    Cryptosporidium removal and inactivation is at least 5.0-log.
    10)
    If the supplier’s bin classification is Bin 4, and the supplier uses
    conventional filtration treatment (including softening) in full compliance
    with the applicable provisions of Subparts B, R, and X of this Part, then
    the additional Cryptosporidium treatment requirements are a 2.5-log
    treatment.
    11)
    If the supplier’s bin classification is Bin 4, and the supplier uses direct
    filtration in full compliance with the applicable provisions of Subparts B,
    R, and X of this Part, then the additional Cryptosporidium treatment
    requirements are a 3-log treatment.
    12)
    If the supplier’s bin classification is Bin 4, and the supplier uses slow sand
    or diatomaceous earth filtration in full compliance with the applicable
    provisions of Subparts B, R, and X of this Part, then the additional
    Cryptosporidium treatment requirements are a 2.5-log treatment.
    13)
    If the supplier’s bin classification is Bin 4, and the supplier uses
    alternative filtration technologies in full compliance with the applicable
    provisions of Subparts B, R, and X of this Part, then the additional
    Cryptosporidium treatment requirements are as determined by the Agency,
    by a SEP issued pursuant to Section 611.110, such that the total
    Cryptosporidium removal and inactivation is at least 5.5-log.
    196
    b)
    Required treatment.
    1)
    A filtered system supplier must use one or more of the treatment and
    management options listed in Section 611.1015, termed the microbial
    toolbox, to comply with the additional Cryptosporidium treatment
    required in subsection (a) of this Section.
    2)
    A supplier classified in Bin 3 or Bin 4 must achieve at least 1-log of the
    additional Cryptosporidium treatment required pursuant to subsection (a)
    of this Section using either one or a combination of the following: bag
    filters, bank filtration, cartridge filters, chlorine dioxide, membranes,
    ozone, or UV, as described in Sections 611.1016 through 611.1020.
    c)
    A failure by a supplier in any month to achieve treatment credit by meeting
    criteria in Sections 611.1016 through 611.1020 for microbial toolbox options that
    is at least equal to the level of treatment required in subsection (a) of this Section
    is a violation of the treatment technique requirement.
    d)
    If the Agency determines, by a SEP issued pursuant to Section 611.110, during a
    sanitary survey or an equivalent source water assessment that after a supplier
    completed the monitoring conducted pursuant to Section 611.1001(a) or
    611.1001(b), significant changes occurred in the supplier’s watershed that could
    lead to increased contamination of the source water by Cryptosporidium, the
    supplier must take actions specified by the Agency in the SEP to address the
    contamination. These actions may include additional source water monitoring or
    implementing microbial toolbox options listed in Section 611.1015.
    BOARD NOTE: Derived from 40 CFR 141.711 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1012
    Treatment Technique Requirements: Unfiltered System Cryptosporidium
    Treatment Requirements
    a)
    Determination of the mean Cryptosporidium level.
    1)
    Following completion of the initial source water monitoring required by
    Section 611.1001(a), an unfiltered system supplier must calculate the
    arithmetic mean of all Cryptosporidium sample concentrations reported
    pursuant to Section 611.1001(a). The supplier must report this value to
    the Agency for approval no later than six months after the month the
    supplier is required to complete initial source water monitoring based on
    the applicable schedule set forth in Section 611.1001(c).
    2)
    Following completion of the second round of source water monitoring
    197
    required by Section 611.1001(b), an unfiltered system supplier must
    calculate the arithmetic mean of all Cryptosporidium sample
    concentrations reported pursuant to Section 611.1001(b). The supplier
    must report this value to the Agency for approval no later than six months
    after the month the supplier is required to complete the second round of
    source water monitoring based on the applicable schedule set forth in
    Section 611.1001(c).
    3)
    If the monthly Cryptosporidium sampling frequency varies, a supplier
    must first calculate a monthly average for each month of monitoring. The
    supplier must then use these monthly average concentrations, rather than
    individual sample concentrations, in the calculation of the mean
    Cryptosporidium level in subsection (a)(1) or (a)(2) of this Section.
    4)
    The report to the Agency of the mean Cryptosporidium levels calculated
    pursuant to subsections (a)(1) and (a)(2) of this Section must include a
    summary of the source water monitoring data used for the calculation.
    5)
    A failure to comply with the conditions of subsection (a) of this Section is
    a violation of the treatment technique requirement.
    b)
    Cryptosporidium inactivation requirements. An unfiltered system supplier must
    provide the level of inactivation for Cryptosporidium specified in this subsection,
    based on its mean Cryptosporidium levels, as determined pursuant to subsection
    (a) of this Section and according to the applicable schedule set forth in Section
    611.1013.
    1)
    An unfiltered system supplier with a mean Cryptosporidium level of 0.01
    oocysts/ℓ or less must provide at least 2-log Cryptosporidium inactivation.
    2)
    An unfiltered system supplier with a mean Cryptosporidium level of
    greater than 0.01 oocysts/ℓ must provide at least 3-log Cryptosporidium
    inactivation.
    c)
    Inactivation treatment technology requirements. An unfiltered system supplier
    must use chlorine dioxide, ozone, or UV, as described in Section 611.1020, to
    meet the Cryptosporidium inactivation requirements of this Section.
    1)
    A supplier that uses chlorine dioxide or ozone and fails to achieve the
    Cryptosporidium inactivation required in subsection (b) of this Section on
    more than one day in the calendar month is in violation of the treatment
    technique requirement.
    2)
    A supplier that uses UV light and fails to achieve the Cryptosporidium
    inactivation required in subsection (b) of this Section by meeting the
    criteria in Section 611.1020(d)(3)(B) is in violation of the treatment
    198
    technique requirement.
    d)
    Use of two disinfectants. An unfiltered system supplier must meet the combined
    Cryptosporidium inactivation requirements of this Section and Giardia lamblia
    and virus inactivation requirements of Section 611.241 using a minimum of two
    disinfectants, and each of two disinfectants must separately achieve the total
    inactivation required for any of Cryptosporidium, Giardia lamblia, or viruses.
    BOARD NOTE: Derived from 40 CFR 141.712 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1013
    Treatment Technique Requirements: Schedule for Compliance with
    Cryptosporidium Treatment Requirements
    a)
    Following initial bin classification pursuant to Section 611.1010(c), a filtered
    system supplier must provide the level of treatment for Cryptosporidium required
    by Section 611.1011 according to the applicable schedule set forth in subsection
    (c) of this Section.
    b)
    Following initial determination of the mean Cryptosporidium level pursuant to
    Section 611.1012(a)(1), an unfiltered system supplier must provide the level of
    treatment for Cryptosporidium required by Section 611.1012 according to the
    applicable schedule set forth in subsection (c) of this Section.
    c)
    Cryptosporidium treatment compliance dates.
    1)
    A supplier that serves 100,000 or more persons must comply with
    Cryptosporidium treatment requirements before April 1, 2012.
    2)
    A supplier that serves 50,000 to 99,999 persons must comply with
    Cryptosporidium treatment requirements before October 1, 2012.
    3)
    A supplier that serves 10,000 to 49,999 persons must comply with
    Cryptosporidium treatment requirements before October 1, 2013.
    4)
    A supplier that serves fewer than 10,000 persons must comply with
    Cryptosporidium treatment requirements before October 1, 2014.
    5)
    The Agency may, by a SEP issued pursuant to Section 611.110, allow up
    to an additional two years from the applicable date set forth in this
    subsection (c) for complying with the treatment requirement if it
    determines that the additional time is necessary for the supplier to make
    capital improvements to implement the treatment.
    d)
    If the bin classification for a filtered system supplier changes following the
    199
    second round of source water monitoring, as determined pursuant to Section
    611.1010(d), the supplier must provide the level of treatment for Cryptosporidium
    required by Section 611.1011 on a schedule approved by the Agency by a SEP
    issued pursuant to Section 611.110.
    e)
    If the mean Cryptosporidium level for an unfiltered system supplier changes
    following the second round of monitoring, as determined pursuant to Section
    611.1012(a)(2), and if the supplier must provide a different level of
    Cryptosporidium treatment pursuant to Section 611.1012 due to this change, the
    supplier must meet this treatment requirement on a schedule approved by the
    Agency by a SEP issued pursuant to Section 611.110.
    BOARD NOTE: Derived from 40 CFR 141.713 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1014
    Treatment Technique Requirements: Requirements for Uncovered
    Finished Water Storage Facilities
    a)
    A supplier that uses uncovered finished water storage facilities must comply with
    the conditions of this Section.
    b)
    A supplier must notify the Agency in writing of the use of each uncovered
    finished water storage facility no later than April 1, 2008.
    c)
    A supplier must meet either of the following conditions for each uncovered
    finished water storage facility, or it must be in compliance with an Agency-
    approved schedule to meet these conditions, no later than April 1, 2009:
    1)
    The supplier must cover any uncovered finished water storage facility; or
    2)
    The supplier must treat the discharge from the uncovered finished water
    storage facility to the distribution system to achieve inactivation or
    removal of at least 4-log virus, 3-log Giardia lamblia, and 2-log
    Cryptosporidium using a protocol approved by the Agency.
    d)
    A failure to comply with the requirements of this Section is a violation of the
    treatment technique requirement.
    BOARD NOTE: Derived from 40 CFR 141.714 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    200
    Section 611.1015
    Requirements for Microbial Toolbox Components: Microbial Toolbox
    Options for Meeting Cryptosporidium Treatment Requirements
    a)
    Treatment credits.
    1)
    A supplier receives the applicable of the treatment credits set forth in
    subsection (b) of this Section by meeting the conditions for microbial
    toolbox options described in Sections 611.1016 through 611.1020. The
    supplier applies these treatment credits to meet the applicable treatment
    requirements set forth in Section 611.1011 or Section 611.1012.
    2)
    An unfiltered system supplier is eligible for treatment credits for the
    microbial toolbox options described in Section 611.1020 only.
    b)
    Subsections (b)(1) through (b)(5) of this Section summarize options in the
    microbial toolbox:
    1)
    Source protection and management toolbox options.
    A)
    Watershed control program: 0.5-log credit for Agency-approved
    program comprising required elements, annual program status
    report to Agency, and regular watershed survey. An unfiltered
    system supplier is not eligible for credit. Specific criteria are set
    forth in Section 611.1016(a).
    B)
    Alternative source or intake management: No prescribed credit. A
    supplier may conduct simultaneous monitoring for treatment bin
    classification at alternative intake locations or under alternative
    intake management strategies. Specific criteria are set forth in
    Section 611.1016(b).
    2)
    Pre-filtration toolbox options.
    A)
    Presedimentation basin with coagulation: 0.5-log credit during
    any month that presedimentation basins achieve a monthly mean
    reduction of 0.5-log or greater in turbidity or alternative Agency-
    approved performance criteria. To be eligible, basins must be
    operated continuously with coagulant addition and all plant flow
    must pass through basins. Specific criteria are set forth in Section
    611.1017(a).
    B)
    Two-stage lime softening: 0.5-log credit for two-stage softening
    where chemical addition and hardness precipitation occur in both
    stages. All plant flow must pass through both stages. Single-stage
    softening is credited as equivalent to conventional treatment.
    Specific criteria are set forth in Section 611.1017(b).
    201
    C)
    Bank filtration: 0.5-log credit for 25-foot setback or 1.0-log credit
    for 50-foot setback; the aquifer must be unconsolidated sand
    containing at least 10 percent fines and average turbidity in the
    wells must be less than 1 NTU. A supplier using wells followed
    by filtration when conducting source water monitoring must
    sample the well to determine bin classification and is not eligible
    for additional credit. Specific criteria are set forth in Section
    611.1017(c).
    3)
    Treatment performance toolbox options.
    A)
    Combined filter performance: 0.5-log credit for combined filter
    effluent turbidity less than or equal to 0.15 NTU in at least 95
    percent of measurements each month. Specific criteria are set
    forth in Section 611.1018(a).
    B)
    Individual filter performance: 0.5-log credit (in addition to 0.5-log
    combined filter performance credit) if individual filter effluent
    turbidity is less than or equal to 0.15 NTU in at least 95 percent of
    samples each month in each filter and is never greater than 0.3
    NTU in two consecutive measurements in any filter. Specific
    criteria are set forth in Section 611.1018(b).
    C)
    Demonstration of performance: Credit awarded to unit process or
    treatment train based on a demonstration to the Agency with an
    Agency-approved protocol. Specific criteria are set forth in
    Section 611.1018(c).
    4)
    Additional filtration toolbox options.
    A)
    Bag or cartridge filters (individual filters): Up to 2-log credit
    based on the removal efficiency demonstrated during challenge
    testing with a 1.0-log factor of safety. Specific criteria are set forth
    in Section 611.1019(a).
    B)
    Bag or cartridge filters (in series): Up to 2.5-log credit based on
    the removal efficiency demonstrated during challenge testing with
    a 0.5-log factor of safety. Specific criteria are set forth in Section
    611.1019(a).
    C)
    Membrane filtration: Log credit equivalent to removal efficiency
    demonstrated in challenge test for device if supported by direct
    integrity testing. Specific criteria are set forth in Section
    611.1019(b).
    202
    D)
    Second stage filtration: 0.5-log credit for second separate granular
    media filtration stage if treatment train includes coagulation prior
    to first filter. Specific criteria are set forth in Section 611.1019(c).
    E)
    Slow sand filters: 2.5-log credit as a secondary filtration step or
    3.0-log credit as a primary filtration process. No prior chlorination
    for either option. Specific criteria are set forth in Section
    611.1019(d).
    5)
    Inactivation toolbox options.
    A)
    Chlorine dioxide: Log credit based on measured CT in relation to
    CT table. Specific criteria are set forth in Section 611.1020(b).
    B)
    Ozone: Log credit based on measured CT in relation to CT table.
    Specific criteria are set forth in Section 611.1020(b).
    C)
    UV: Log credit based on validated UV dose in relation to UV dose
    table; reactor validation testing required to establish UV dose and
    associated operating conditions. Specific criteria are set forth in
    Section 611.1020(d).
    BOARD NOTE: Derived from 40 CFR 141.715 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1016
    Requirements for Microbial Toolbox Components: Source Toolbox
    Components
    a)
    Watershed control program. A supplier receives 0.5-log Cryptosporidium
    treatment credit for implementing a watershed control program that meets the
    requirements of this Section.
    1)
    A supplier that intends to apply for the watershed control program credit
    must notify the Agency of its intent no later than two years prior to the
    treatment compliance date applicable to the supplier in Section 611.1013.
    2)
    A supplier must submit to the Agency a proposed watershed control plan
    no later than one year before the applicable treatment compliance date in
    Section 611.1013. The Agency must approve the watershed control plan
    for the supplier to receive watershed control program treatment credit.
    The watershed control plan must include the following elements:
    A)
    Identification of an “area of influence” outside of which the
    likelihood of Cryptosporidium or fecal contamination affecting the
    treatment plant intake is not significant. This is the area to be
    203
    evaluated in future watershed surveys pursuant to subsection
    (a)(5)(B) of this Section;
    B)
    Identification of both potential and actual sources of
    Cryptosporidium contamination and an assessment of the relative
    impact of these sources on the supplier’s source water quality;
    C)
    An analysis of the effectiveness and feasibility of control measures
    that could reduce Cryptosporidium loading from sources of
    contamination to the supplier’s source water; and
    D)
    A statement of goals and specific actions the supplier will
    undertake to reduce source water Cryptosporidium levels. The
    plan must explain how the actions are expected to contribute to
    specific goals, identify watershed partners and their roles, identify
    resource requirements and commitments, and include a schedule
    for plan implementation with deadlines for completing specific
    actions identified in the plan.
    3)
    A supplier with an existing watershed control program (i.e., a program in
    place on January 5, 2006) is eligible to seek this credit. Its watershed
    control plans must meet the criteria in subsection (a)(2) of this Section and
    must specify ongoing and future actions that will reduce source water
    Cryptosporidium levels.
    4)
    If the Agency does not respond to a supplier regarding approval of a
    watershed control plan submitted pursuant to this Section and the supplier
    meets the other requirements of this Section, the watershed control
    program will be considered approved and 0.5 log Cryptosporidium
    treatment credit will be awarded, unless and until the Agency
    subsequently withdraws such approval by a SEP issued pursuant to
    Section 611.110.
    5)
    A supplier must complete each of the following actions to maintain the
    0.5-log credit.
    A)
    It must submit an annual watershed control program status report
    to the Agency. The annual watershed control program status
    report must describe the supplier’s implementation of the approved
    plan and assess the adequacy of the plan to meet its goals. The
    report must explain how the supplier is addressing any
    shortcomings in plan implementation, including those previously
    identified by the Agency or as the result of the watershed survey
    conducted pursuant to subsection (a)(5)(B) of this Section. The
    report must also describe any significant changes that have
    occurred in the watershed since the last watershed sanitary survey.
    204
    If a supplier determines during implementation that making a
    significant change to its approved watershed control program is
    necessary, the supplier must notify the Agency prior to making any
    such changes. If any change is likely to reduce the level of source
    water protection, the supplier must also list in its notification the
    actions the supplier will take to mitigate this effect;
    B)
    The supplier must undergo a watershed sanitary survey every three
    years for a CWS supplier and every five years for a non-CWS
    supplier and submit the survey report to the Agency. The survey
    must be conducted according to Agency guidelines and by persons
    that the Agency approves.
    i)
    The watershed sanitary survey must meet the following
    criteria: it must encompass the region identified in the
    Agency-approved watershed control plan as the area of
    influence; assess the implementation of actions to reduce
    source water Cryptosporidium levels; and identify any
    significant new sources of Cryptosporidium.
    ii)
    If the Agency determines that significant changes may have
    occurred in the watershed since the previous watershed
    sanitary survey, the supplier must undergo another
    watershed sanitary survey before a date the Agency
    requires by a SEP issued pursuant to Section 611.110,
    which may be earlier than the regular date in subsection
    (a)(5)(B) of this Section; and
    C)
    The supplier must make the watershed control plan, annual status
    reports, and watershed sanitary survey reports available to the
    public upon request. These documents must be in a plain language
    style and include criteria by which to evaluate the success of the
    program in achieving plan goals. The Agency may, by a SEP
    issued pursuant to Section 611.110, approve that a supplier
    withhold from the public portions of the annual status report,
    watershed control plan, and watershed sanitary survey based on
    water supply security considerations.
    6)
    If the Agency determines that a supplier is not carrying out the approved
    watershed control plan, the Agency may, by a SEP issued pursuant to
    Section 611.110, withdraw the watershed control program treatment
    credit.
    b)
    Alternative source.
    1)
    A supplier may conduct source water monitoring that reflects a different
    205
    intake location (either in the same source or for an alternate source) or a
    different procedure for the timing or level of withdrawal from the source
    (alternative source monitoring). If the Agency approves by a SEP issued
    pursuant to Section 611.110, a supplier may determine its bin
    classification pursuant to Section 611.1010 based on the alternative source
    monitoring results.
    2)
    If a supplier conducts alternative source monitoring pursuant to subsection
    (b)(1) of this Section, it must also monitor their current plant intake
    concurrently as described in Section 611.1001.
    3)
    Alternative source monitoring pursuant to subsection (b)(1) of this Section
    must meet the requirements for source monitoring to determine bin
    classification, as described in Sections 611.1001 through 611.1006. A
    supplier must report the alternative source monitoring results to the
    Agency, along with supporting information documenting the operating
    conditions under which the samples were collected.
    4)
    If a supplier determines its bin classification pursuant to Section 611.1010
    using alternative source monitoring results that reflect a different intake
    location or a different procedure for managing the timing or level of
    withdrawal from the source, the supplier must relocate the intake or
    permanently adopt the withdrawal procedure, as applicable, no later than
    the applicable treatment compliance date in Section 611.1013.
    BOARD NOTE: Derived from 40 CFR 141.716 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1017
    Requirements for Microbial Toolbox Components: Pre-Filtration
    Treatment Toolbox Components
    a)
    Presedimentation. A supplier receives 0.5-log Cryptosporidium treatment credit
    for a presedimentation basin during any month the process meets the criteria in
    this subsection (a).
    1)
    The presedimentation basin must be in continuous operation and must
    treat the entire plant flow taken from a surface water or groundwater under
    the direct influent of surface water source.
    2)
    The supplier must continuously add a coagulant to the presedimentation
    basin.
    3)
    The presedimentation basin must achieve both of the following
    performance criteria:
    206
    A)
    It demonstrates at least 0.5-log mean reduction of influent
    turbidity. This reduction must be determined using daily turbidity
    measurements in the presedimentation process influent and
    effluent, and it must be calculated as follows: log
    10
    (monthly mean
    of daily influent turbidity)-log
    10
    (monthly mean of daily effluent
    turbidity); and
    B)
    It complies with Agency-approved performance criteria that
    demonstrate at least 0.5-log mean removal of micronsized
    particulate material through the presedimentation process.
    b)
    Two-stage lime softening. A supplier receives an additional 0.5-log
    Cryptosporidium treatment credit for a two-stage lime softening plant if chemical
    addition and hardness precipitation occur in two separate and sequential softening
    stages prior to filtration. Both softening stages must treat the entire plant flow
    taken from a surface water or groundwater under the direct influent of surface
    water source.
    c)
    Bank filtration. A supplier receives Cryptosporidium treatment credit for bank
    filtration that serves as pretreatment to a filtration plant by meeting the criteria in
    this subsection (c). A supplier using bank filtration when it begins source water
    monitoring pursuant to Section 611.1001(a) must collect samples as described in
    Section 611.1003(d), and it is not eligible for this credit.
    1)
    A well with a groundwater flow path of at least 25 feet receives 0.5-log
    treatment credit, or a well with a groundwater flow path of at least 50 feet
    receives 1.0-log treatment credit. The groundwater flow path must be
    determined as specified in subsection (c)(4) of this Section.
    2)
    Only a well in granular aquifers is eligible for treatment credit. A granular
    aquifer is one comprised of sand, clay, silt, rock fragments, pebbles or
    larger particles, and minor cement. A supplier must characterize the
    aquifer at the well site to determine aquifer properties. A supplier must
    extract a core from the aquifer and demonstrate that in at least 90 percent
    of the core length, grains less than 1.0 mm in diameter constitute at least
    10 percent of the core material.
    3)
    Only a horizontal or vertical well is eligible for treatment credit.
    4)
    For a vertical well, the groundwater flow path is the measured distance
    from the edge of the surface water body under high flow conditions
    (determined by the 100 year floodplain elevation boundary or by the
    floodway, as defined in Federal Emergency Management Agency flood
    hazard maps) to the well screen. For a horizontal well, the groundwater
    flow path is the measured distance from the bed of the river under normal
    flow conditions to the closest horizontal well lateral screen.
    207
    5)
    The supplier must monitor each wellhead for turbidity at least once every
    four hours while the bank filtration process is in operation. If monthly
    average turbidity levels, based on daily maximum values in the well,
    exceed 1 NTU, the supplier must report this result to the Agency and
    conduct an assessment within 30 days to determine the cause of the high
    turbidity levels in the well. If the Agency determines that microbial
    removal has been compromised, it may, by a SEP issued pursuant to
    Section 611.110, revoke treatment credit until the supplier implements
    corrective actions approved by the Agency to remediate the problem.
    6)
    Springs and infiltration galleries are not eligible for treatment credit
    pursuant to this Section, but are eligible for credit pursuant to Section
    611.1018(c).
    7)
    Bank filtration demonstration of performance. The Agency may, by a
    SEP issued pursuant to Section 611.110, approve Cryptosporidium
    treatment credit for bank filtration based on a demonstration of
    performance study that meets the criteria in this subsection. This
    treatment credit may be greater than 1.0-log and may be awarded to bank
    filtration that does not meet the criteria in subsections (c)(1) through (c)(5)
    of this Section.
    A)
    The study must follow an Agency-approved protocol and must
    involve the collection of data on the removal of Cryptosporidium
    or a surrogate for Cryptosporidium and related hydrogeologic and
    water quality parameters during the full range of operating
    conditions.
    B)
    The study must include sampling both from the production wells
    and from monitoring wells that are screened and located along the
    shortest flow path between the surface water source and the
    production wells.
    BOARD NOTE: Derived from 40 CFR 141.717 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1018
    Requirements for Microbial Toolbox Components: Treatment
    Performance Toolbox Components
    a)
    Combined filter performance. A supplier that uses conventional filtration
    treatment or direct filtration treatment receives an additional 0.5-log
    Cryptosporidium treatment credit during any month it meets the criteria in this
    subsection (a). Its combined filter effluent (CFE) turbidity must be less than or
    equal to 0.15 NTU in at least 95 percent of the measurements. Turbidity must be
    208
    measured as described in Sections 611.531 and 611.533.
    b)
    Individual filter performance. A supplier that uses conventional filtration
    treatment or direct filtration treatment receives 0.5-log Cryptosporidium treatment
    credit, which can be in addition to the 0.5-log credit pursuant to subsection (a) of
    this Section, during any month it meets the criteria in this subsection (b).
    Compliance with these criteria must be based on individual filter turbidity
    monitoring as described in Section 611.744 or 611.956(a), as applicable.
    1)
    The filtered water turbidity for each individual filter must be less than or
    equal to 0.15 NTU in at least 95 percent of the measurements recorded
    each month.
    2)
    No individual filter may have a measured turbidity greater than 0.3 NTU
    in two consecutive measurements taken 15 minutes apart.
    3)
    Any supplier that has received treatment credit for individual filter
    performance and fails to meet the requirements of subsection (b)(1) or
    (b)(2) of this Section during any month does not receive a treatment
    technique violation pursuant to Section 611.1011(c) if the Agency
    determines the following:
    A)
    The failure was due to unusual and short-term circumstances that
    could not reasonably be prevented through optimizing treatment
    plant design, operation, and maintenance; and
    B)
    The supplier has experienced no more than two such failures in
    any calendar year.
    c)
    Demonstration of performance. The Agency may, by a SEP issued pursuant to
    Section 611.110, approve Cryptosporidium treatment credit for drinking water
    treatment processes based on a demonstration of performance study that meets the
    criteria in this subsection (c). This treatment credit may be greater than or less
    than the prescribed treatment credits in Section 611.1011 or Sections 611.1017
    through 611.1020 and may be awarded to treatment processes that do not meet the
    criteria for the prescribed credits.
    1)
    The supplier cannot receive the prescribed treatment credit for any toolbox
    option in Sections 611.1017 through 611.1020 if that toolbox option is
    included in a demonstration of performance study for which treatment
    credit is awarded pursuant to this subsection (b).
    2)
    The demonstration of performance study must follow an Agency-approved
    protocol and must demonstrate the level of Cryptosporidium reduction the
    treatment process will achieve under the full range of expected operating
    conditions for the supplier.
    209
    3)
    Approval by the Agency must be in writing and may include monitoring
    and treatment performance criteria that the supplier must demonstrate and
    report on an ongoing basis to remain eligible for the treatment credit. The
    Agency may, by a SEP issued pursuant to Section 611.110, designate such
    criteria where necessary to verify that the conditions under which the
    demonstration of performance credit was approved are maintained during
    routine operation.
    BOARD NOTE: Derived from 40 CFR 141.718 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1019
    Requirements for Microbial Toolbox Components: Additional Filtration
    Toolbox Components
    a)
    Bag and cartridge filters. A supplier receives Cryptosporidium treatment credit of
    up to 2.0-log for individual bag or cartridge filters and up to 2.5-log for bag or
    cartridge filters operated in series by meeting the criteria set forth in subsections
    (a)(1) through (a)(10) of this Section. To be eligible for this credit, the supplier
    must report the results of challenge testing that meets the requirements of
    subsections (a)(2) through (a)(9) of this Section to the Agency. The filters must
    treat the entire plant flow taken from a Subpart B source.
    1)
    The Cryptosporidium treatment credit awarded to bag or cartridge filters
    must be based on the removal efficiency demonstrated during challenge
    testing that is conducted according to the criteria set forth in subsections
    (a)(2) through (a)(9) of this Section. A factor of safety equal to 1-log for
    individual bag or cartridge filters and 0.5-log for bag or cartridge filters in
    series must be applied to challenge testing results to determine removal
    credit. A supplier may use results from challenge testing conducted prior
    to January 5, 2006 if the prior testing was consistent with the criteria
    specified in subsections (a)(2) through (a)(9) of this Section.
    2)
    Challenge testing must be performed on full-scale bag or cartridge filters,
    and the associated filter housing or pressure vessel, that are identical in
    material and construction to the filters and housings the supplier will use
    for removal of Cryptosporidium. Bag or cartridge filters must be
    challenge tested in the same configuration that the supplier will use, either
    as individual filters or as a series configuration of filters.
    3)
    Challenge testing must be conducted using Cryptosporidium or a surrogate
    that is removed no more efficiently than Cryptosporidium. The
    microorganism or surrogate used during challenge testing is referred to as
    the challenge particulate. The concentration of the challenge particulate
    must be determined using a method capable of discreetly quantifying the
    210
    specific microorganism or surrogate used in the test; gross measurements
    such as turbidity may not be used.
    4)
    The maximum feed water concentration that can be used during a
    challenge test must be based on the detection limit of the challenge
    particulate in the filtrate (i.e., filtrate detection limit) and must be
    calculated using the following equation:
    Maximum Feed Concentration = 1
    ×
    10
    4
    ×
    (Filtrate
    Detection
    Limit)
    5)
    Challenge testing must be conducted at the maximum design flow rate for
    the filter as specified by the manufacturer.
    6)
    Each filter evaluated must be tested for a duration sufficient to reach 100
    percent of the terminal pressure drop, which establishes the maximum
    pressure drop under which the filter may be used to comply with the
    requirements of this Subpart Z.
    7)
    Removal efficiency of a filter must be determined from the results of the
    challenge test and expressed in terms of log removal values using the
    following equation:
    LRV
    =
    Log
    10
    (
    C
    f
    )
    −
    Log
    10
    (
    C
    p
    )
    Where:
    LRV = log removal value demonstrated during challenge testing
    C
    f
    =
    the feed concentration measured during the challenge test
    C
    p
    = the filtrate concentration measured during the challenge
    test. In applying this equation, the same units must be used
    for the feed and filtrate concentrations. If the challenge
    particulate is not detected in the filtrate, then the term Cp
    must be set equal to the detection limit.
    8)
    Each filter tested must be challenged with the challenge particulate during
    three periods over the filtration cycle: within two hours of start-up of a
    new filter; when the pressure drop is between 45 and 55 percent of the
    terminal pressure drop; and at the end of the cycle after the pressure drop
    has reached 100 percent of the terminal pressure drop. An LRV must be
    calculated for each of these challenge periods for each filter tested. The
    LRV for the filter (LRV
    filter
    ) must be assigned the value of the minimum
    LRV observed during the three challenge periods for that filter.
    211
    9)
    If fewer than 20 filters are tested, the overall removal efficiency for the
    filter product line must be set equal to the lowest LRV
    filter
    among the
    filters tested. If 20 or more filters are tested, the overall removal
    efficiency for the filter product line must be set equal to the 10th
    percentile of the set of LRV
    filter
    values for the various filters tested. The
    percentile is defined by (i/(n+1)) where i is the rank of n individual data
    points ordered lowest to highest. If necessary, the 10th percentile may be
    calculated using linear interpolation.
    10)
    If a previously tested filter is modified in a manner that could change the
    removal efficiency of the filter product line, challenge testing to
    demonstrate the removal efficiency of the modified filter must be
    conducted and submitted in writing to the Agency.
    b)
    Membrane filtration.
    1)
    A supplier receives Cryptosporidium treatment credit for membrane
    filtration that meets the criteria of this subsection (b). Membrane cartridge
    filters that meet the definition of membrane filtration in Section 611.102
    are eligible for this credit. The level of treatment credit a supplier receives
    is equal to the lower of the following values:
    A)
    The removal efficiency demonstrated during challenge testing
    conducted pursuant to the conditions in subsection (b)(2) of this
    Section; or
    B)
    The maximum removal efficiency that can be verified through
    direct integrity testing used with the membrane filtration process
    pursuant to the conditions in subsection (b)(3) of this Section.
    2)
    Challenge testing. The membrane used by the supplier must undergo
    challenge testing to evaluate removal efficiency, and the supplier must
    report the results of challenge testing to the Agency. Challenge testing
    must be conducted according to the criteria set forth in subsections
    (b)(2)(A) through (b)(2)(G) of this Section. A supplier may use data from
    challenge testing conducted prior to January 5, 2006 if the prior testing
    was consistent with the criteria set forth in subsections (b)(2)(A) through
    (b)(2)(G) of this Section.
    A)
    Challenge testing must be conducted on either a full-scale
    membrane module, identical in material and construction to the
    membrane modules used in the supplier’s treatment facility, or a
    smaller-scale membrane module, identical in material and similar
    in construction to the full-scale module. A module is defined as
    the smallest component of a membrane unit in which a specific
    212
    membrane surface area is housed in a device with a filtrate outlet
    structure.
    B)
    Challenge testing must be conducted using Cryptosporidium
    oocysts or a surrogate that is removed no more efficiently than
    Cryptosporidium oocysts. The organism or surrogate used during
    challenge testing is referred to as the challenge particulate. The
    concentration of the challenge particulate, in both the feed and
    filtrate water, must be determined using a method capable of
    discretely quantifying the specific challenge particulate used in the
    test; gross measurements such as turbidity may not be used.
    C)
    The maximum feed water concentration that can be used during a
    challenge test is based on the detection limit of the challenge
    particulate in the filtrate and must be determined according to the
    following equation:
    Maximum Feed Concentration = 3.16
    ×
    10
    6
    ×
    (Filtrate
    Detection Limit)
    D)
    Challenge testing must be conducted under representative
    hydraulic conditions at the maximum design flux and maximum
    design process recovery specified by the manufacturer for the
    membrane module. Flux is defined as the throughput of a pressure
    driven membrane process expressed as flow per unit of membrane
    area. Recovery is defined as the volumetric percent of feed water
    that is converted to filtrate over the course of an operating cycle
    uninterrupted by events such as chemical cleaning or a solids
    removal process (i.e., backwashing).
    E)
    Removal efficiency of a membrane module must be calculated
    from the challenge test results and expressed as a log removal
    value according to the following equation:
    LRV
    =
    Log
    10
    (
    C
    f
    )
    −
    Log
    10
    (
    C
    p
    )
    Where:
    LRV = log removal value demonstrated during the
    challenge test
    C
    f
    =
    the feed concentration measured during the
    challenge test
    C
    p
    = the filtrate concentration measured during the
    213
    challenge test. Equivalent units must be used for
    the feed and filtrate concentrations. If the challenge
    particulate is not detected in the filtrate, the term C
    p
    is set equal to the detection limit for the purpose of
    calculating the LRV. An LRV must be calculated
    for each membrane module evaluated during the
    challenge test.
    F)
    The removal efficiency of a membrane filtration process
    demonstrated during challenge testing must be expressed as a log
    removal value (LRV
    C-Test
    ). If fewer than 20 modules are tested,
    then LRV
    C-Test
    is equal to the lowest of the representative LRVs
    among the modules tested. If 20 or more modules are tested, then
    LRVC-Test is equal to the 10th percentile of the representative
    LRVs among the modules tested. The percentile is defined by
    (i/(n+1)) where i is the rank of n individual data points ordered
    lowest to highest. If necessary, the 10th percentile may be
    calculated using linear interpolation.
    G)
    The challenge test must establish a quality control release value
    (QCRV) for a non-destructive performance test that demonstrates
    the Cryptosporidium removal capability of the membrane filtration
    module. This performance test must be applied to each production
    membrane module used by the supplier that was not directly
    challenge tested in order to verify Cryptosporidium removal
    capability. Production modules that do not meet the established
    QCRV are not eligible for the treatment credit demonstrated during
    the challenge test.
    H)
    If a previously tested membrane is modified in a manner that could
    change the removal efficiency of the membrane or the applicability
    of the non-destructive performance test and associated QCRV,
    additional challenge testing to demonstrate the removal efficiency
    of, and determine a new QCRV for, the modified membrane must
    be conducted and submitted to the Agency.
    3)
    Direct integrity testing. A supplier must conduct direct integrity testing in
    a manner that demonstrates a removal efficiency equal to or greater than
    the removal credit awarded to the membrane filtration process and meets
    the requirements described in subsections (b)(3)(A) through (b)(3)(F) of
    this Section. A “direct integrity test” is defined as a physical test applied
    to a membrane unit in order to identify and isolate integrity breaches (i.e.,
    one or more leaks that could result in contamination of the filtrate).
    A)
    The direct integrity test must be independently applied to each
    membrane unit in service. A membrane unit is defined as a group
    214
    of membrane modules that share common valving that allows the
    unit to be isolated from the rest of the treatment system for the
    purpose of integrity testing or other maintenance.
    B)
    The direct integrity method must have a resolution of three
    micrometers or less, where resolution is defined as the size of the
    smallest integrity breach that contributes to a response from the
    direct integrity test.
    C)
    The direct integrity test must have a sensitivity sufficient to verify
    the log treatment credit awarded to the membrane filtration process
    by the Agency, where sensitivity is defined as the maximum log
    removal value that can be reliably verified by a direct integrity test.
    Sensitivity must be determined using the appropriate of the
    following approaches, considering the type of direct integrity test
    the supplier uses:
    i)
    For a direct integrity test that uses an applied pressure or
    vacuum, the direct integrity test sensitivity must be
    calculated according to the following equation:
    ⎟
    ⎟
    ⎠
    ⎞
    ⎜
    ⎜
    ⎝
    ⎛
    ×
    =
    breach
    p
    DIT
    10
    VCF Q
    Q
    LRV
    Log
    Where:
    LRV
    DIT
    = the sensitivity of the direct
    integrity test
    Q
    p
    = total design filtrate flow from the
    membrane unit
    Q
    breach
    = flow of water from an integrity
    breach associated with the smallest
    integrity test response that can be
    reliably measured
    VCF = volumetric concentration factor. The
    volumetric concentration factor is
    the ratio of the suspended solids
    concentration on the high pressure
    side of the membrane relative to that
    in the feed water; or
    ii)
    For a direct integrity test that uses a particulate or
    215
    molecular marker, the direct integrity test sensitivity must
    be calculated according to the following equation:
    LRV
    DIT
    =
    Log
    10
    (
    C
    f
    )
    −
    Log
    10
    (
    C
    p
    )
    Where:
    LRV
    DIT
    = the sensitivity of the direct
    integrity test
    C
    f
    =
    the typical feed concentration of the
    marker used in the test
    C
    p
    = the filtrate concentration of the
    marker from an integral membrane
    unit
    D)
    A supplier must establish a control limit within the sensitivity
    limits of the direct integrity test that is indicative of an integral
    membrane unit capable of meeting the removal credit awarded by
    the Agency.
    E)
    If the result of a direct integrity test exceeds the control limit
    established pursuant to subsection (b)(3)(D) of this Section, the
    supplier must remove the membrane unit from service. The
    supplier must conduct a direct integrity test to verify any repairs,
    and it may return the membrane unit to service only if the direct
    integrity test is within the established control limit.
    F)
    A supplier must conduct direct integrity testing on each membrane
    unit at a frequency of not less than once each day that the
    membrane unit is in operation. The Agency may, by a SEP issued
    pursuant to Section 611.110, approve less frequent testing, based
    on demonstrated process reliability, the use of multiple barriers
    effective for Cryptosporidium, or reliable process safeguards.
    4)
    Indirect integrity monitoring. A supplier must conduct continuous indirect
    integrity monitoring on each membrane unit according to the criteria in
    subsections (b)(4)(A) through (b)(4)(E) of this Section. “Indirect integrity
    monitoring” is defined as monitoring some aspect of filtrate water quality
    that is indicative of the removal of particulate matter. A supplier that
    implements continuous direct integrity testing of membrane units in
    accordance with the criteria in subsections (b)(3)(A) through (b)(3)(E) of
    this Section is not subject to the requirements for continuous indirect
    integrity monitoring. The supplier must submit a monthly report to the
    216
    Agency summarizing all continuous indirect integrity monitoring results
    triggering direct integrity testing and the corrective action that was taken
    in each case.
    A)
    Unless the Agency approves an alternative parameter by a SEP
    issued pursuant to Section 611.110, continuous indirect integrity
    monitoring must include continuous filtrate turbidity monitoring.
    B)
    Continuous indirect integrity monitoring must be conducted at a
    frequency of no less than once every 15 minutes.
    C)
    Continuous indirect integrity monitoring must be separately
    conducted on each membrane unit.
    D)
    If continuous indirect integrity monitoring includes turbidity and if
    the filtrate turbidity readings are above 0.15 NTU for a period
    greater than 15 minutes (i.e., two consecutive 15-minute readings
    above 0.15 NTU), direct integrity testing must immediately be
    performed on the associated membrane unit, as specified in
    subsections (b)(3)(A) through (b)(3)(E) of this Section.
    E)
    If indirect integrity monitoring includes an Agency-approved
    alternative parameter and if the alternative parameter exceeds an
    Agency-approved control limit for a period greater than 15
    minutes, direct integrity testing must immediately be performed on
    the associated membrane units, as specified in subsections
    (b)(3)(A) through (b)(3)(E) of this Section.
    c)
    Second stage filtration. A supplier receives 0.5-log Cryptosporidium treatment
    credit for a separate second stage of filtration that consists of sand, dual media,
    GAC, or other fine grain media following granular media filtration if the Agency
    approves by a SEP issued pursuant to Section 611.110. To be eligible for this
    credit, the first stage of filtration must be preceded by a coagulation step and both
    filtration stages must treat the entire plant flow taken from a surface water or
    groundwater under the direct influence of surface water source. A cap, such as
    GAC, on a single stage of filtration is not eligible for this credit. The Agency
    must approve the treatment credit based on an assessment of the design
    characteristics of the filtration process.
    d)
    Slow sand filtration (as secondary filter). A supplier is eligible to receive 2.5-log
    Cryptosporidium treatment credit by a SEP issued pursuant to Section 611.110 for
    a slow sand filtration process that follows a separate stage of filtration if both
    filtration stages treat entire plant flow taken from a surface water or groundwater
    under the direct influence of surface water source and no disinfectant residual is
    present in the influent water to the slow sand filtration process. The Agency must
    approve the treatment credit based on an assessment of the design characteristics
    217
    of the filtration process. This subsection (d) does not apply to treatment credit
    awarded to slow sand filtration used as a primary filtration process.
    BOARD NOTE: Derived from 40 CFR 141.719 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1020
    Requirements for Microbial Toolbox Components: Inactivation Toolbox
    Components
    a)
    Calculation of CT values.
    1)
    CT is the product of the disinfectant contact time (T, in minutes) and
    disinfectant concentration (C, in milligrams per liter). A supplier with
    treatment credit for chlorine dioxide or ozone pursuant to subsection (b) or
    (c) of this Section must calculate CT at least once each day, with both C
    and T measured during peak hourly flow, as specified in Sections 611.531
    and 611.532.
    2)
    A supplier with several disinfection segments in sequence may calculate
    CT for each segment, where a disinfection segment is defined as a
    treatment unit process with a measurable disinfectant residual level and a
    liquid volume. Under this approach, the supplier must add the
    Cryptosporidium CT values in each segment to determine the total CT for
    the treatment plant.
    b)
    CT values for chlorine dioxide and ozone.
    1)
    A supplier receives the Cryptosporidium treatment credit listed in Table H
    to this Part by meeting the corresponding chlorine dioxide CT value for
    the applicable water temperature, as described in subsection (a) of this
    Section.
    2)
    A supplier receives the Cryptosporidium treatment credit listed in Table I
    to this Part by meeting the corresponding ozone CT values for the
    applicable water temperature, as described in subsection (a) of this
    Section.
    c)
    Site-specific study. The Agency may, by a SEP issued pursuant to Section
    611.110, approve alternative chlorine dioxide or ozone CT values to those listed
    in Tables H and I to this Part on a site-specific basis. The Agency must base this
    approval on a site-specific study conducted by the supplier according to an
    Agency-approved protocol.
    d)
    Ultraviolet light. A supplier receives Cryptosporidium, Giardia lamblia, and virus
    treatment credits for ultraviolet (UV) light reactors by achieving the
    218
    corresponding UV dose values shown in Table J to this Part. The supplier must
    validate and monitor UV reactors, as described in subsections (d)(2) and (d)(3) of
    this Section, to demonstrate that they are achieving a particular UV dose value for
    treatment credit.
    1)
    UV dose table. The treatment credits listed in Table J to this Part are for
    UV light at a wavelength of 254 nm as produced by a low-pressure
    mercury vapor lamp. To receive treatment credit for other lamp types, a
    supplier must demonstrate an equivalent germicidal dose through reactor
    validation testing, as described in subsection (d)(2) of this Section. The
    UV dose values in this table are applicable only to post-filter applications
    of UV in a filtered system supplier and to an unfiltered system supplier.
    2)
    Reactor validation testing. A supplier must use UV reactors that have
    undergone validation testing to determine the operating conditions under
    which the reactor delivers the UV dose required in subsection (d)(1) of
    this Section (i.e., validated operating conditions). These operating
    conditions must include flow rate; UV intensity, as measured by a UV
    sensor; and UV lamp status.
    A)
    When determining validated operating conditions, a supplier must
    account for the following factors: UV absorbance of the water;
    lamp fouling and aging; measurement uncertainty of on-line
    sensors; UV dose distributions arising from the velocity profiles
    through the reactor; failure of UV lamps or other critical treatment
    system components; and inlet and outlet piping or channel
    configurations of the UV reactor.
    B)
    Validation testing must include the following: Full scale testing of
    a reactor that conforms uniformly to the UV reactors used by the
    supplier and inactivation of a test microorganism whose dose
    response characteristics have been quantified with a low pressure
    mercury vapor lamp.
    C)
    The Agency may, by a SEP issued pursuant to Section 611.110,
    approve an alternative approach to validation testing.
    3)
    Reactor monitoring.
    A)
    A supplier must monitor its UV reactors to determine if the
    reactors are operating within validated conditions, as determined
    pursuant to subsection (d)(2) of this Section. This monitoring must
    include UV intensity, as measured by a UV sensor; flow rate; lamp
    status; and other parameters that the Agency has designated by a
    SEP issued pursuant to Section 611.110 based on UV reactor
    operation. A supplier must verify the calibration of UV sensors
    219
    and must recalibrate sensors in accordance with a protocol that the
    Agency has approved by the SEP issued pursuant to Section
    611.110.
    B)
    To receive treatment credit for UV light, a supplier must treat at
    least 95 percent of the water delivered to the public during each
    month by UV reactors operating within validated conditions for the
    required UV dose, as described in subsections (d)(1) and (d)(2) of
    this Section. The supplier must demonstrate compliance with this
    condition by the monitoring required pursuant to subsection
    (d)(3)(A) of this Section.
    BOARD NOTE: Derived from 40 CFR 141.720 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1021
    Reporting and Recordkeeping Requirements: Reporting Requirements
    a)
    A supplier must report sampling schedules pursuant to Section 611.1002 and
    source water monitoring results pursuant to Section 611.1006 unless it notifies the
    Agency that it will not conduct source water monitoring because the supplier
    meets the criteria of Section 611.1001(d).
    b)
    A supplier must report the use of uncovered finished water storage facilities to the
    Agency, as described in Section 611.1014.
    c)
    A filtered system supplier must report its Cryptosporidium bin classification, as
    described in Section 611.1010.
    d)
    An unfiltered system supplier must report its mean source water Cryptosporidium
    level, as described in Section 611.1012.
    e)
    A supplier must report disinfection profiles and benchmarks to the Agency, as
    described in Sections 611.1008 and 611.1009, prior to making a significant
    change in disinfection practice.
    f)
    A supplier must report to the Agency in accordance with subsections (f)(1)
    through (f)(15) of this Section for any microbial toolbox options used to comply
    with treatment requirements pursuant to Section 611.1011 or Section 611.1012.
    Alternatively, the Agency may, by a SEP issued pursuant to Section 611.110,
    approve a supplier to certify operation within required parameters for treatment
    credit rather than reporting monthly operational data for toolbox options.
    1)
    A supplier that uses the watershed control program toolbox option must
    submit the following information on the indicated schedule:
    220
    A)
    A notice of intention to develop a new or continue an existing
    watershed control program no later than two years before the
    applicable treatment compliance date in Section 611.1013;
    B)
    A watershed control plan no later than one year before the
    applicable treatment compliance date in Section 611.1013;
    C)
    An annual watershed control program status report every 12
    months, beginning one year after the applicable treatment
    compliance date in Section 611.1013; and
    D)
    A watershed sanitary survey report: for a CWS supplier, every
    three years beginning three years after the applicable treatment
    compliance date in Section 611.1013 or, for a non-CWS supplier,
    every five years beginning five years after the applicable treatment
    compliance date in Section 611.1013.
    2)
    A supplier that uses the alternative source or intake management toolbox
    option must submit verification that it has relocated the intake or adopted
    the intake withdrawal procedure reflected in monitoring results no later
    than the applicable treatment compliance date in Section 611.1013.
    3)
    A supplier that uses the presedimentation toolbox option must submit
    monthly verification of the information set forth in each of subsections
    (f)(3)(A) through (f)(3)(D) of this Section, subject to the limitations of
    subsection (f)(3)(E) of this Section.
    A)
    Continuous basin operation;
    B)
    Treatment of 100% of the flow;
    C)
    Continuous addition of a coagulant; and
    D)
    At least 0.5-log mean reduction of influent turbidity or compliance
    with alternative Agency-approved performance criteria.
    E)
    Monthly reporting must occur within 10 days following the month
    in which the monitoring was conducted, beginning on the
    applicable treatment compliance date in Section 611.1013.
    4)
    A supplier that uses the two-stage lime softening toolbox option must
    submit monthly verification of the information set forth in each of
    subsections (f)(4)(A) and (f)(4)(B) of this Section, subject to the
    limitations of subsection (f)(4)(C) of this Section.
    A)
    That chemical addition and hardness precipitation occurred in two
    221
    separate and sequential softening stages prior to filtration; and
    B)
    That both stages treated 100% of the plant flow.
    C)
    Monthly reporting must occur within 10 days following the month
    in which the monitoring was conducted, beginning on the
    applicable treatment compliance date in Section 611.1013.
    5)
    A supplier that uses the bank filtration toolbox option must submit the
    following information on the indicated schedule:
    A)
    An initial demonstration of the following no later than the
    applicable treatment compliance date in Section 611.1013:
    i)
    The existence of unconsolidated, predominantly sandy
    aquifer; and
    ii)
    A setback distance of at least 25 ft. (0.5-log credit) or 50 ft.
    (1.0-log credit).
    B)
    If the monthly average of daily maximum turbidity is greater than
    1 NTU, then the supplier must report that result and submit an
    assessment of the cause within 30 days following the month in
    which the monitoring was conducted, beginning on the applicable
    treatment compliance date in Section 611.1013.
    6)
    A supplier that uses the combined filter performance toolbox option must
    submit monthly verification of combined filter effluent (CFE) turbidity
    levels less than or equal to 0.15 NTU in at least 95 percent of the four-
    hour CFE measurements taken each month. Monthly reporting must occur
    within 10 days following the month in which the monitoring was
    conducted, beginning on the applicable treatment compliance date in
    Section 611.1013.
    7)
    A supplier that uses the individual filter performance toolbox option must
    submit monthly verification of the information set forth in each of
    subsections (f)(7)(A) and (f)(7)(B) of this Section, subject to the
    limitations of subsection (f)(7)(C) of this Section.
    A)
    That individual filter effluent (IFE ) turbidity levels were less than
    or equal to 0.15 NTU in at least 95 percent of samples each month
    in each filter; and
    B)
    That no individual filter measured greater than 0.3 NTU in two
    consecutive readings 15 minutes apart.
    222
    C)
    Monthly reporting must occur within 10 days following the month
    in which the monitoring was conducted, beginning on the
    applicable treatment compliance date in Section 611.1013.
    8)
    A supplier that uses the demonstration of performance toolbox option
    must submit the information set forth in each of subsections (f)(8)(A) and
    (f)(8)(B) of this Section on the indicated schedule:
    A)
    Results from testing following an Agency-approved protocol no
    later than the applicable treatment compliance date in Section
    611.1013; and
    B)
    As required by the Agency, monthly verification of operation
    within conditions of Agency approval for demonstration of
    performance credit within 10 days following the month in which
    monitoring was conducted, beginning on the applicable treatment
    compliance date in Section 611.1013.
    9)
    A supplier that uses the bag filters and cartridge filters toolbox option
    must submit the information set forth in each of subsections (f)(9)(A) and
    (f)(9)(B) of this Section on the indicated schedule:
    A)
    A demonstration, no later than the applicable treatment compliance
    date in Section 611.1013, that the following criteria are met:
    i)
    It must demonstrate that the process meets the definition of
    bag or cartridge filtration; and
    ii)
    It must demonstrate that the removal efficiency established
    through challenge testing that meets criteria in this Subpart
    Z; and
    B)
    Monthly verification, within 10 days following the month in which
    monitoring was conducted, beginning on the applicable treatment
    compliance date in Section 611.1013, that 100% of plant flow was
    filtered.
    10)
    A supplier that uses the membrane filtration toolbox option must submit
    the following information on the indicated schedule:
    A)
    Results of verification testing no later than the applicable treatment
    compliance date in Section 611.1013 that demonstrate the
    following:
    i)
    It must demonstrate that the removal efficiency established
    through challenge testing that meets criteria set forth in this
    223
    Subpart Z; and
    ii)
    It must demonstrate the integrity test method and
    parameters, including resolution, sensitivity, test frequency,
    control limits, and associated baseline; and
    B)
    A monthly report within 10 days following the month in which
    monitoring was conducted, beginning on the applicable treatment
    compliance date in Section 611.1013, that summarizes the
    following:
    i)
    It must summarize all direct integrity tests above the
    control limit; and
    ii)
    If applicable, it must summarize any turbidity or alternative
    Agency-approved indirect integrity monitoring results
    triggering direct integrity testing and the corrective action
    that was taken.
    11)
    A supplier that uses the second stage filtration toolbox option must
    submit monthly verification within 10 days following the month in which
    monitoring was conducted, beginning on the applicable treatment
    compliance date in Section 611.1013, that 100% of flow was filtered
    through both stages and that first stage was preceded by coagulation step.
    12)
    A supplier that uses the slow sand filtration (as secondary filter) toolbox
    option must submit monthly verification within 10 days following the
    month in which monitoring was conducted, beginning on the applicable
    treatment compliance date in Section 611.1013, that both a slow sand filter
    and a preceding separate stage of filtration treated 100% of flow from
    Subpart B sources.
    13)
    A supplier that uses the chlorine dioxide toolbox option must submit a
    monthly summary of CT values for each day within 10 days following the
    month in which monitoring was conducted, beginning on the applicable
    treatment compliance date in Section 611.1013, as described in Section
    611.1020.
    14)
    A supplier that uses the ozone toolbox option must submit a monthly
    summary of CT values for each day within 10 days following the month in
    which monitoring was conducted, beginning on the applicable treatment
    compliance date in Section 611.1013, as described in Section 611.1020.
    15)
    A supplier that uses the UV toolbox option must submit the following
    information on the indicated schedule:
    224
    A)
    Validation test results no later than the applicable treatment
    compliance date in Section 611.1013, that demonstrate operating
    conditions that achieve required UV dose.
    B)
    A monthly report summarizing the percentage of water entering
    the distribution system that was not treated by UV reactors
    operating within validated conditions for the required dose within
    10 days following the month in which monitoring was conducted,
    beginning on the applicable treatment compliance date in Section
    611.1013, as specified in Section 611.1020(d).
    BOARD NOTE: Derived from 40 CFR 141.721 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1022
    Reporting and Recordkeeping Requirements: Recordkeeping
    Requirements
    a)
    A supplier must keep results from the initial round of source water monitoring
    pursuant to Section 611.1001(a) and the second round of source water monitoring
    pursuant to Section 611.1001(b) until three years after bin classification pursuant
    to Section 611.1010 for a filtered system supplier or determination of the mean
    Cryptosporidium level pursuant to Section 611.1010 for an unfiltered system
    supplier for the particular round of monitoring.
    b)
    A supplier must keep any notification to the Agency that it will not conduct
    source water monitoring due to meeting the criteria of Section 611.1001(d) for
    three years.
    c)
    A supplier must keep the results of treatment monitoring associated with
    microbial toolbox options pursuant to Sections 611.1016 through 611.1020 and
    with uncovered finished water reservoirs pursuant to Section 611.1014, as
    applicable, for three years.
    BOARD NOTE: Derived from 40 CFR 141.722 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.1023
    Requirements to Respond to Significant Deficiencies Identified in
    Sanitary Surveys Performed by USEPA or the Agency
    a)
    A “sanitary survey” is an onsite review of the water source (identifying sources of
    contamination by using results of source water assessments where available),
    facilities, equipment, operation, maintenance, and monitoring compliance of a
    PWS to evaluate the adequacy of the PWS, its sources and operations, and the
    distribution of safe drinking water.
    225
    b)
    For the purposes of this Section, a “significant deficiency” includes a defect in
    design, operation, or maintenance, or a failure or malfunction of the sources,
    treatment, storage, or distribution supplier that USEPA or the Agency determines
    to be causing, or has the potential for causing, the introduction of contamination
    into the water delivered to consumers.
    c)
    For sanitary surveys performed by USEPA or the Agency, the supplier must
    respond in writing to significant deficiencies identified in sanitary survey reports
    no later than 45 days after receipt of the report, indicating how and on what
    schedule the supplier will address significant deficiencies noted in the survey.
    d)
    A supplier must correct significant deficiencies identified in sanitary survey
    reports according to the schedule approved by USEPA or the Agency, or if there
    is no approved schedule, according to the schedule reported pursuant to
    subsection (c) of this Section if such deficiencies are within the control of the
    supplier.
    BOARD NOTE: Derived from 40 CFR 141.723 (2006).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Appendix A
    Regulated Contaminants
    Microbiological contaminants.
    Contaminant (units): Total Coliform Bacteria
    Traditional MCL in mg/ℓ: MCL: (a supplier that collects 40 or more samples/month)
    five percent or fewer of monthly samples are positive; (systems that collect fewer
    than 40 samples/month) one or fewer positive monthly samples.
    To convert for CCR, multiply by: --
    MCL in CCR units: MCL: (a supplier that collects 40 or more samples/month) five
    percent or fewer of monthly samples are positive; (a supplier that collects fewer
    than 40 samples/month) one or fewer positive monthly samples.
    MCLG: 0
    Major sources in drinking water: Naturally present in the environment.
    Health effects language: Coliforms are bacteria that are naturally present in the
    environment and are used as an indicator that other, potentially-harmful, bacteria
    may be present. Coliforms were found in more samples than allowed and this
    was a warning of potential problems.
    Contaminant (units): Fecal coliform and E. coli
    Traditional MCL in mg/ℓ: 0
    To convert for CCR, multiply by: --
    MCL in CCR units: 0
    MCLG: 0
    226
    Major sources in drinking water: Human and animal fecal waste.
    Health effects language: Fecal coliforms and E. coli are bacteria whose presence
    indicates that the water may be contaminated with human or animal wastes.
    Microbes in these wastes can cause short-term effects, such as diarrhea, cramps,
    nausea, headaches, or other symptoms. They may pose a special health risk for
    infants, young children, some of the elderly, and people with severely-
    compromised immune systems.
    Contaminant (units): Fecal Indicators (enterococci or coliphage).
    Traditional MCL in mg/ℓ: TT.
    To convert for CCR, multiply by: --
    MCL in CCR units: TT.
    MCLG: N/A
    Major sources in drinking water: Human and animal fecal waste.
    Health effects language: Fecal indicators are microbes whose presence indicates that the
    water may be contaminated with human or animal wastes. Microbes in these
    wastes can cause short-term health effects, such as diarrhea, cramps, nausea,
    headaches, or other symptoms. They may pose a special health risk for infants,
    young children, some of the elderly, and people with severely compromised
    immune systems.
    Contaminant (units): Total organic carbon (ppm)
    Traditional MCL in mg/ℓ: TT
    To convert for CCR, multiply by: --
    MCL in CCR units: TT
    MCLG: N/A
    Major sources in drinking water: Naturally present in the environment.
    Health effects language: Total organic carbon (TOC) has no health effects. However,
    total organic carbon provides a medium for the formation of disinfection
    byproducts. These byproducts include trihalomethanes (THMs) and haloacetic
    acids (HAAs). Drinking water containing these byproducts in excess of the MCL
    may lead to adverse health effects, liver or kidney problems, or nervous system
    effects, and may lead to an increased risk of getting cancer.
    Contaminant (units): Turbidity (NTU)
    Traditional MCL in mg/ℓ: TT
    To convert for CCR, multiply by: --
    MCL in CCR units: TT
    MCLG: N/A
    Major sources in drinking water: Soil runoff.
    Health effects language: Turbidity has no health effects. However, turbidity can
    interfere with disinfection and provide a medium for microbial growth. Turbidity
    may indicate the presence of disease-causing organisms. These organisms
    include bacteria, viruses, and parasites that can cause symptoms such as nausea,
    cramps, diarrhea, and associated headaches.
    227
    Radioactive contaminants.
    Contaminant (units): Beta/photon emitters (mrem/yr)
    Traditional MCL in mg/ℓ: 4 mrem/yr
    To convert for CCR, multiply by: --
    MCL in CCR units: 4
    MCLG: 0
    Major sources in drinking water: Decay of natural and man-made deposits.
    Health effects language: Certain minerals are radioactive and may emit forms of
    radiation known as photons and beta radiation. Some people who drink water
    containing beta particle and photon radioactivity in excess of the MCL over many
    years may have an increased risk of getting cancer.
    Contaminant (units): Alpha emitters (pCi/ℓ)
    Traditional MCL in mg/ℓ: 15 pCi/ℓ
    To convert for CCR, multiply by: --
    MCL in CCR units: 15
    MCLG: 0
    Major sources in drinking water: Erosion of natural deposits.
    Health effects language: Certain minerals are radioactive and may emit a form of
    radiation known as alpha radiation. Some people who drink water containing
    alpha emitters in excess of the MCL over many years may have an increased risk
    of getting cancer.
    Contaminant (units): Combined radium (pCi/ℓ)
    Traditional MCL in mg/ℓ: 5 pCi/ℓ
    To convert for CCR, multiply by: --
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Erosion of natural deposits.
    Health effects language: Some people who drink water containing radium-226 or -228 in
    excess of the MCL over many years may have an increased risk of getting cancer.
    Contaminant (units): Uranium (μg/ℓ)
    Traditional MCL in mg/ℓ: 30
    μg/ℓ
    To convert for CCR, multiply by: --
    MCL in CCR units: 30
    MCLG: 0
    Major sources in drinking water: Erosion of natural deposits.
    Health effects language: Some people who drink water containing uranium in excess of
    the MCL over many years may have an increased risk of getting cancer and
    kidney toxicity.
    Inorganic contaminants.
    Contaminant (units): Antimony (ppb)
    228
    Traditional MCL in mg/ℓ: 0.006
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 6
    MCLG: 6
    Major sources in drinking water: Discharge from petroleum refineries; fire retardants;
    ceramics; electronics; solder.
    Health effects language: Some people who drink water containing antimony well in
    excess of the MCL over many years could experience increases in blood
    cholesterol and decreases in blood sugar.
    Contaminant (units): Arsenic (ppb)
    Traditional MCL in mg/ℓ: 0.05 until January 23, 2006 or 0.010 effective January 23,
    2006
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 50
    MCLG: 0 (effective January 26, 2006)
    Major sources in drinking water: Erosion of natural deposits; runoff from orchards;
    runoff from glass and electronics production wastes.
    Health effects language: Some people who drink water containing arsenic in excess of
    the MCL over many years could experience skin damage or problems with their
    circulatory system, and may have an increased risk of getting cancer.
    Contaminant (units): Asbestos (MFL)
    Traditional MCL in mg/ℓ: 7 MFL
    To convert for CCR, multiply by: --
    MCL in CCR units: 7
    MCLG: 7
    Major sources in drinking water: Decay of asbestos cement water mains; erosion of
    natural deposits.
    Health effects language: Some people who drink water containing asbestos in excess of
    the MCL over many years may have an increased risk of developing benign
    intestinal polyps.
    Contaminant (units): Barium (ppm)
    Traditional MCL in mg/ℓ: 2
    To convert for CCR, multiply by: --
    MCL in CCR units: 2
    MCLG: 2
    Major sources in drinking water: Discharge of drilling wastes; discharge from metal
    refineries; erosion of natural deposits.
    Health effects language: Some people who drink water containing barium in excess of
    the MCL over many years could experience an increase in their blood pressure.
    Contaminant (units): Beryllium (ppb)
    Traditional MCL in mg/ℓ: 0.004
    To convert for CCR, multiply by: 1000
    229
    MCL in CCR units: 4
    MCLG: 4
    Major sources in drinking water: Discharge from metal refineries and coal-burning
    factories; discharge from electrical, aerospace, and defense industries.
    Health effects language: Some people who drink water containing beryllium well in
    excess of the MCL over many years could develop intestinal lesions.
    Contaminant (units): Bromate (ppb)
    Traditional MCL in mg/ℓ: 0.010
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 10
    MCLG: 0
    Major sources in drinking water: By-product of drinking water disinfection.
    Health effects language: Some people who drink water containing bromate in excess of
    the MCL over many years may have an increased risk of getting cancer.
    Contaminant (units): Cadmium (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 5
    Major sources in drinking water: Corrosion of galvanized pipes; erosion of natural
    deposits; discharge from metal refineries; runoff from waste batteries and paints.
    Health effects language: Some people who drink water containing cadmium in excess of
    the MCL over many years could experience kidney damage.
    Contaminant (units): Chloramines (ppm)
    Traditional MCL in mg/ℓ: MRDL=4
    To convert for CCR, multiply by: --
    MCL in CCR units: MRDL=4
    MCLG: MRDLG=4
    Major sources in drinking water: Water additive used to control microbes.
    Health effects language: Some people who drink water containing chloramines well in
    excess of the MRDL could experience irritating effects to their eyes and nose.
    Some people who drink water containing chloramines well in excess of the
    MRDL could experience stomach discomfort or anemia.
    Contaminant (units): Chlorine (ppm)
    Traditional MCL in mg/ℓ: MRDL=4
    To convert for CCR, multiply by: --
    MCL in CCR units: MRDL=4
    MCLG: MRDLG=4
    Major sources in drinking water: Water additive used to control microbes.
    Health effects language: Some people who drink water containing chlorine well in
    excess of the MRDL could experience irritating effects to their eyes and nose.
    Some people who drink water containing chlorine well in excess of the MRDL
    230
    could experience stomach discomfort.
    Contaminant (units): Chlorine dioxide (ppb)
    Traditional MCL in mg/ℓ: MRDL=800
    To convert for CCR, multiply by: 1000
    MCL in CCR units: MRDL=800
    MCLG: MRDLG=800
    Major sources in drinking water: Water additive used to control microbes.
    Health effects language: Some infants and young children who drink water containing
    chlorine dioxide well in excess of the MRDL could experience nervous system
    effects. Similar effects may occur in fetuses of pregnant women who drink water
    containing chlorine dioxide in excess of the MRDL. Some people may
    experience anemia.
    Contaminant (units): Chlorite (ppm)
    Traditional MCL in mg/ℓ: MRDL=1
    To convert for CCR, multiply by: --
    MCL in CCR units: MRDL=1
    MCLG: MRDLG=0.8
    Major sources in drinking water: By-product of drinking water disinfection.
    Health effects language: Some infants and young children who drink water containing
    chlorite well in excess of the MCL could experience nervous system effects.
    Similar effects may occur in fetuses of pregnant women who drink water
    containing chlorite in excess of the MCL. Some people may experience anemia.
    Contaminant (units): Chromium (ppb)
    Traditional MCL in mg/ℓ: 0.1
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 100
    MCLG: 100
    Major sources in drinking water: Discharge from steel and pulp mills; erosion of natural
    deposits.
    Health effects language: Some people who use water containing chromium well in
    excess of the MCL over many years could experience allergic dermatitis.
    Contaminant (units): Copper (ppm)
    Traditional MCL in mg/ℓ: AL=1.3
    To convert for CCR, multiply by: --
    MCL in CCR units: AL=1.3
    MCLG: 1.3
    Major sources in drinking water: Corrosion of household plumbing systems; erosion of
    natural deposits.
    Health effects language: Copper is an essential nutrient, but some people who drink
    water containing copper in excess of the action level over a relatively short
    amount of time could experience gastrointestinal distress. Some people who
    drink water containing copper in excess of the action level over many years could
    231
    suffer liver or kidney damage. People with Wilson’s Disease should consult their
    personal doctor.
    Contaminant (units): Cyanide (ppb)
    Traditional MCL in mg/ℓ: 0.2
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 200
    MCLG: 200
    Major sources in drinking water: Discharge from steel/metal factories; discharge from
    plastic and fertilizer factories.
    Health effects language: Some people who drink water containing cyanide well in excess
    of the MCL over many years could experience nerve damage or problems with
    their thyroid.
    Contaminant (units): Fluoride (ppm)
    Traditional MCL in mg/ℓ: 4
    To convert for CCR, multiply by: --
    MCL in CCR units: 4
    MCLG: 4
    Major sources in drinking water: Erosion of natural deposits; water additive that
    promotes strong teeth; discharge from fertilizer and aluminum factories.
    Health effects language: Some people who drink water containing fluoride in excess of
    the MCL over many years could get bone disease, including pain and tenderness
    of the bones. Fluoride in drinking water at half the MCL or more may cause
    mottling of children’s teeth, usually in children less than nine years old. Mottling,
    also known as dental fluorosis, may include brown staining or pitting of the teeth,
    and occurs only in developing teeth before they erupt from the gums.
    Contaminant (units): Lead (ppb)
    Traditional MCL in mg/ℓ: AL=0.015
    To convert for CCR, multiply by: 1000
    MCL in CCR units: AL=15
    MCLG: 0
    Major sources in drinking water: Corrosion of household plumbing systems; erosion of
    natural deposits.
    Health effects language: Infants and children who drink water containing lead in excess
    of the action level could experience delays in their physical or mental
    development. Children could show slight deficits in attention span and learning
    abilities. Adults who drink this water over many years could develop kidney
    problems or high blood pressure.
    Contaminant (units): Mercury (inorganic) (ppb)
    Traditional MCL in mg/ℓ: 0.002
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 2
    MCLG: 2
    232
    Major sources in drinking water: Erosion of natural deposits; discharge from refineries
    and factories; runoff from landfills; runoff from cropland.
    Health effects language: Some people who drink water containing inorganic mercury
    well in excess of the MCL over many years could experience kidney damage.
    Contaminant (units): Nitrate (ppm)
    Traditional MCL in mg/ℓ: 10
    To convert for CCR, multiply by: --
    MCL in CCR units: 10
    MCLG: 10
    Major sources in drinking water: Runoff from fertilizer use; leaching from septic tanks,
    sewage; erosion of natural deposits.
    Health effects language: Infants below the age of six months who drink water containing
    nitrate in excess of the MCL could become seriously ill and, if untreated, may die.
    Symptoms include shortness of breath and blue baby syndrome.
    Contaminant (units): Nitrite (ppm)
    Traditional MCL in mg/ℓ: 1
    To convert for CCR, multiply by: --
    MCL in CCR units: 1
    MCLG: 1
    Major sources in drinking water: Runoff from fertilizer use; leaching from septic tanks,
    sewage; erosion of natural deposits.
    Health effects language: Infants below the age of six months who drink water containing
    nitrite in excess of the MCL could become seriously ill and, if untreated, may die.
    Symptoms include shortness of breath and blue baby syndrome.
    Contaminant (units): Selenium (ppb)
    Traditional MCL in mg/ℓ: 0.05
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 50
    MCLG: 50
    Major sources in drinking water: Discharge from petroleum and metal refineries; erosion
    of natural deposits; discharge from mines.
    Health effects language: Selenium is an essential nutrient. However, some people who
    drink water containing selenium in excess of the MCL over many years could
    experience hair or fingernail losses, numbness in fingers or toes, or problems with
    their circulation.
    Contaminant (units): Thallium (ppb)
    Traditional MCL in mg/ℓ: 0.002
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 2
    MCLG: 0.5
    Major sources in drinking water: Leaching from ore-processing sites; discharge from
    electronics, glass, and drug factories.
    233
    Health effects language: Some people who drink water containing thallium in excess of
    the MCL over many years could experience hair loss, changes in their blood, or
    problems with their kidneys, intestines, or liver.
    Synthetic organic contaminants including pesticides and herbicides.
    Contaminant (units): 2,4-D (ppb)
    Traditional MCL in mg/ℓ: 0.07
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 70
    MCLG: 70
    Major sources in drinking water: Runoff from herbicide used on row crops.
    Health effects language: Some people who drink water containing the weed killer 2,4-D
    well in excess of the MCL over many years could experience problems with their
    kidneys, liver, or adrenal glands.
    Contaminant (units): 2,4,5-TP (silvex) (ppb)
    Traditional MCL in mg/ℓ: 0.05
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 50
    MCLG: 50
    Major sources in drinking water: Residue of banned herbicide.
    Health effects language: Some people who drink water containing silvex in excess of the
    MCL over many years could experience liver problems.
    Contaminant (units): Acrylamide
    Traditional MCL in mg/ℓ: TT
    To convert for CCR, multiply by: --
    MCL in CCR units: TT
    MCLG: 0
    Major sources in drinking water: Added to water during sewage/wastewater treatment.
    Health effects language: Some people who drink water containing high levels of
    acrylamide over a long period of time could have problems with their nervous
    system or blood, and may have an increased risk of getting cancer.
    Contaminant (units): Alachlor (ppb)
    Traditional MCL in mg/ℓ: 0.002
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 2
    MCLG: 0
    Major sources in drinking water: Runoff from herbicide used on row crops.
    Health effects language: Some people who drink water containing alachlor in excess of
    the MCL over many years could have problems with their eyes, liver, kidneys, or
    spleen, or experience anemia, and may have an increased risk of getting cancer.
    Contaminant (units): Atrazine (ppb)
    234
    Traditional MCL in mg/ℓ: 0.003
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 3
    MCLG: 3
    Major sources in drinking water: Runoff from herbicide used on row crops.
    Health effects language: Some people who drink water containing atrazine well in
    excess of the MCL over many years could experience problems with their
    cardiovascular system or reproductive difficulties.
    Contaminant (units): Benzo(a)pyrene (PAH) (nanograms/ℓ)
    Traditional MCL in mg/ℓ: 0.0002
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 200
    MCLG: 0
    Major sources in drinking water: Leaching from linings of water storage tanks and
    distribution lines.
    Health effects language: Some people who drink water containing benzo(a)pyrene in
    excess of the MCL over many years may experience reproductive difficulties and
    may have an increased risk of getting cancer.
    Contaminant (units): Carbofuran (ppb)
    Traditional MCL in mg/ℓ: 0.04
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 40
    MCLG: 40
    Major sources in drinking water: Leaching of soil fumigant used on rice and alfalfa.
    Health effects language: Some people who drink water containing carbofuran in excess
    of the MCL over many years could experience problems with their blood, or
    nervous or reproductive systems.
    Contaminant (units): Chlordane (ppb)
    Traditional MCL in mg/ℓ: 0.002
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 2
    MCLG: 0
    Major sources in drinking water: Residue of banned termiticide.
    Health effects language: Some people who drink water containing chlordane in excess of
    the MCL over many years could experience problems with their liver or nervous
    system, and may have an increased risk of getting cancer.
    Contaminant (units): Dalapon (ppb)
    Traditional MCL in mg/ℓ: 0.2
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 200
    MCLG: 200
    Major sources in drinking water: Runoff from herbicide used on rights of way.
    235
    Health effects language: Some people who drink water containing dalapon well in excess
    of the MCL over many years could experience minor kidney changes.
    Contaminant (units): Di(2-ethylhexyl)adipate (ppb)
    Traditional MCL in mg/ℓ: 0.4
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 400
    MCLG: 400
    Major sources in drinking water: Discharge from chemical factories.
    Health effects language: Some people who drink water containing di(2-
    ethylhexyl)adipate well in excess of the MCL over many years could experience
    toxic effects, such as weight loss, liver enlargement, or possible reproductive
    difficulties.
    Contaminant (units): Di(2-ethylhexyl)phthalate (ppb)
    Traditional MCL in mg/ℓ: 0.006
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 6
    MCLG: 0
    Major sources in drinking water: Discharge from rubber and chemical factories.
    Health effects language: Some people who drink water containing di(2-
    ethylhexyl)phthalate well in excess of the MCL over many years may have
    problems with their liver or experience reproductive difficulties, and they may
    have an increased risk of getting cancer.
    Contaminant (units): Dibromochloropropane (DBCP) (ppt)
    Traditional MCL in mg/ℓ: 0.0002
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 200
    MCLG: 0
    Major sources in drinking water: Runoff/leaching from soil fumigant used on soybeans,
    cotton, pineapples, and orchards.
    Health effects language: Some people who drink water containing DBCP in excess of
    the MCL over many years could experience reproductive problems and may have
    an increased risk of getting cancer.
    Contaminant (units): Dinoseb (ppb)
    Traditional MCL in mg/ℓ: 0.007
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 7
    MCLG: 7
    Major sources in drinking water: Runoff from herbicide used on soybeans and
    vegetables.
    Health effects language: Some people who drink water containing dinoseb well in excess
    of the MCL over many years could experience reproductive difficulties.
    236
    Contaminant (units): Diquat (ppb)
    Traditional MCL in mg/ℓ: 0.02
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 20
    MCLG: 20
    Major sources in drinking water: Runoff from herbicide use.
    Health effects language: Some people who drink water containing diquat in excess of the
    MCL over many years could get cataracts.
    Contaminant (units): Dioxin (2,3,7,8-TCDD) (ppq)
    Traditional MCL in mg/ℓ: 0.00000003
    To convert for CCR, multiply by: 1,000,000,000
    MCL in CCR units: 30
    MCLG: 0
    Major sources in drinking water: Emissions from waste incineration and other
    combustion; discharge from chemical factories.
    Health effects language: Some people who drink water containing dioxin in excess of the
    MCL over many years could experience reproductive difficulties and may have an
    increased risk of getting cancer.
    Contaminant (units): Endothall (ppb)
    Traditional MCL in mg/ℓ: 0.1
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 100
    MCLG: 100
    Major sources in drinking water: Runoff from herbicide use.
    Health effects language: Some people who drink water containing endothall in excess of
    the MCL over many years could experience problems with their stomach or
    intestines.
    Contaminant (units): Endrin (ppb)
    Traditional MCL in mg/ℓ: 0.002
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 2
    MCLG: 2
    Major sources in drinking water: Residue of banned insecticide.
    Health effects language: Some people who drink water containing endrin in excess of the
    MCL over many years could experience liver problems.
    Contaminant (units): Epichlorohydrin
    Traditional MCL in mg/ℓ: TT
    To convert for CCR, multiply by: --
    MCL in CCR units: TT
    MCLG: 0
    Major sources in drinking water: Discharge from industrial chemical factories; an
    impurity of some water treatment chemicals.
    237
    Health effects language: Some people who drink water containing high levels of
    epichlorohydrin over a long period of time could experience stomach problems,
    and may have an increased risk of getting cancer.
    Contaminant (units): Ethylene dibromide (ppt)
    Traditional MCL in mg/ℓ: 0.00005
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 50
    MCLG: 0
    Major sources in drinking water: Discharge from petroleum refineries.
    Health effects language: Some people who drink water containing ethylene dibromide in
    excess of the MCL over many years could experience problems with their liver,
    stomach, reproductive system, or kidneys, and may have an increased risk of
    getting cancer.
    Contaminant (units): Glyphosate (ppb)
    Traditional MCL in mg/ℓ: 0.7
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 700
    MCLG: 700
    Major sources in drinking water: Runoff from herbicide use.
    Health effects language: Some people who drink water containing glyphosate in excess
    of the MCL over many years could experience problems with their kidneys or
    reproductive difficulties.
    Contaminant (units): Heptachlor (ppt)
    Traditional MCL in mg/ℓ: 0.0004
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 400
    MCLG: 0
    Major sources in drinking water: Residue of banned pesticide.
    Health effects language: Some people who drink water containing heptachlor in excess
    of the MCL over many years could experience liver damage and may have an
    increased risk of getting cancer.
    Contaminant (units): Heptachlor epoxide (ppt)
    Traditional MCL in mg/ℓ: 0.0002
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 200
    MCLG: 0
    Major sources in drinking water: Breakdown of heptachlor.
    Health effects language: Some people who drink water containing heptachlor epoxide in
    excess of the MCL over many years could experience liver damage, and may
    have an increased risk of getting cancer.
    Contaminant (units): Hexachlorobenzene (ppb)
    238
    Traditional MCL in mg/ℓ: 0.001
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 1
    MCLG: 0
    Major sources in drinking water: Discharge from metal refineries and agricultural
    chemical factories.
    Health effects language: Some people who drink water containing hexachlorobenzene in
    excess of the MCL over many years could experience problems with their liver or
    kidneys, or adverse reproductive effects, and may have an increased risk of
    getting cancer.
    Contaminant (units): Hexachlorocyclopentadiene (ppb)
    Traditional MCL in mg/ℓ: 0.05
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 50
    MCLG: 50
    Major sources in drinking water: Discharge from chemical factories.
    Health effects language: Some people who drink water containing
    hexachlorocyclopentadiene well in excess of the MCL over many years could
    experience problems with their kidneys or stomach.
    Contaminant (units): Lindane (ppt)
    Traditional MCL in mg/ℓ: 0.0002
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 200
    MCLG: 200
    Major sources in drinking water: Runoff/leaching from insecticide used on cattle,
    lumber, gardens.
    Health effects language: Some people who drink water containing lindane in excess of
    the MCL over many years could experience problems with their kidneys or liver.
    Contaminant (units): Methoxychlor (ppb)
    Traditional MCL in mg/ℓ: 0.04
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 40
    MCLG: 40
    Major sources in drinking water: Runoff/leaching from insecticide used on fruits,
    vegetables, alfalfa, livestock.
    Health effects language: Some people who drink water containing methoxychlor in
    excess of the MCL over many years could experience reproductive difficulties.
    Contaminant (units): Oxamyl (vydate) (ppb)
    Traditional MCL in mg/ℓ: 0.2
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 200
    MCLG: 200
    239
    Major sources in drinking water: Runoff/leaching from insecticide used on apples,
    potatoes and tomatoes.
    Health effects language: Some people who drink water containing oxamyl in excess of
    the MCL over many years could experience slight nervous system effects.
    Contaminant (units): PCBs (polychlorinated biphenyls) (ppt)
    Traditional MCL in mg/ℓ: 0.0005
    To convert for CCR, multiply by: 1,000,000
    MCL in CCR units: 500
    MCLG: 0
    Major sources in drinking water: Runoff from landfills; discharge of waste chemicals.
    Health effects language: Some people who drink water containing PCBs in excess of the
    MCL over many years could experience changes in their skin, problems with their
    thymus gland, immune deficiencies, or reproductive or nervous system
    difficulties, and may have an increased risk of getting cancer.
    Contaminant (units): Pentachlorophenol (ppb)
    Traditional MCL in mg/ℓ: 0.001
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 1
    MCLG: 0
    Major sources in drinking water: Discharge from wood preserving factories.
    Health effects language: Some people who drink water containing pentachlorophenol in
    excess of the MCL over many years could experience problems with their liver or
    kidneys, and may have an increased risk of getting cancer.
    Contaminant (units): Picloram (ppb)
    Traditional MCL in mg/ℓ: 0.5
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 500
    MCLG: 500
    Major sources in drinking water: Herbicide runoff.
    Health effects language: Some people who drink water containing picloram in excess of
    the MCL over many years could experience problems with their liver.
    Contaminant (units): Simazine (ppb)
    Traditional MCL in mg/ℓ: 0.004
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 4
    MCLG: 4
    Major sources in drinking water: Herbicide runoff.
    Health effects language: Some people who drink water containing simazine in excess of
    the MCL over many years could experience problems with their blood.
    Contaminant (units): Toxaphene (ppb)
    Traditional MCL in mg/ℓ: 0.003
    240
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 3
    MCLG: 0
    Major sources in drinking water: Runoff/leaching from insecticide used on cotton and
    cattle.
    Health effects language: Some people who drink water containing toxaphene in excess
    of the MCL over many years could have problems with their kidneys, liver, or
    thyroid, and may have an increased risk of getting cancer.
    Volatile organic contaminants.
    Contaminant (units): Benzene (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from factories; leaching from gas storage
    tanks and landfills.
    Health effects language: Some people who drink water containing benzene in excess of
    the MCL over many years could experience anemia or a decrease in blood
    platelets, and may have an increased risk of getting cancer.
    Contaminant (units): Carbon tetrachloride (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from chemical plants and other industrial
    activities.
    Health effects language: Some people who drink water containing carbon tetrachloride
    in excess of the MCL over many years could experience problems with their liver
    and may have an increased risk of getting cancer.
    Contaminant (units): Chlorobenzene (ppb)
    Traditional MCL in mg/ℓ: 0.1
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 100
    MCLG: 100
    Major sources in drinking water: Discharge from chemical and agricultural chemical
    factories.
    Health effects language: Some people who drink water containing chlorobenzene in
    excess of the MCL over many years could experience problems with their liver or
    kidneys.
    Contaminant (units): o-Dichlorobenzene (ppb)
    Traditional MCL in mg/ℓ: 0.6
    241
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 600
    MCLG: 600
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing o-dichlorobenzene
    well in excess of the MCL over many years could experience problems with their
    liver, kidneys, or circulatory systems.
    Contaminant (units): p-Dichlorobenzene (ppb)
    Traditional MCL in mg/ℓ: 0.075
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 75
    MCLG: 75
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing p-dichlorobenzene in
    excess of the MCL over many years could experience anemia; damage to their
    liver, kidneys, or spleen; or changes in their blood.
    Contaminant (units): 1,2-Dichloroethane (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing 1,2-dichloroethane in
    excess of the MCL over many years may have an increased risk of getting cancer.
    Contaminant (units): 1,1-Dichloroethylene (ppb)
    Traditional MCL in mg/ℓ: 0.007
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 7
    MCLG: 7
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing 1,1-dichloroethylene
    in excess of the MCL over many years could experience problems with their liver.
    Contaminant (units): cis-1,2-Dichloroethylene (ppb)
    Traditional MCL in mg/ℓ: 0.07
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 70
    MCLG: 70
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing cis-1,2-
    dichloroethylene in excess of the MCL over many years could experience
    problems with their liver.
    242
    Contaminant (units): trans-1,2-Dichloroethylene (ppb)
    Traditional MCL in mg/ℓ: 0.1
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 100
    MCLG: 100
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing trans-1,2-
    dichloroethylene well in excess of the MCL over many years could experience
    problems with their liver.
    Contaminant (units): Dichloromethane (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from pharmaceutical and chemical factories.
    Health effects language: Some people who drink water containing dichloromethane in
    excess of the MCL over many years could have liver problems and may have an
    increased risk of getting cancer.
    Contaminant (units): 1,2-Dichloropropane (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing 1,2-dichloropropane
    in excess of the MCL over many years may have an increased risk of getting
    cancer.
    Contaminant (units): Ethylbenzene (ppb)
    Traditional MCL in mg/ℓ: 0.7
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 700
    MCLG: 700
    Major sources in drinking water: Discharge from petroleum refineries.
    Health effects language: Some people who drink water containing ethylbenzene well in
    excess of the MCL over many years could experience problems with their liver or
    kidneys.
    Contaminant (units): Haloacetic acids (HAA5) (ppb)
    Traditional MCL in mg/ℓ: 0.060
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 60
    MCLG: N/A
    Major sources in drinking water: Byproduct of drinking water disinfection.
    243
    Health effects language: Some people who drink water containing haloacetic acids in
    excess of the MCL over many years may have an increased risk of getting cancer.
    Contaminant (units): Styrene (ppb)
    Traditional MCL in mg/ℓ: 0.1
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 100
    MCLG: 100
    Major sources in drinking water: Discharge from rubber and plastic factories; leaching
    from landfills.
    Health effects language: Some people who drink water containing styrene well in excess
    of the MCL over many years could have problems with their liver, kidneys, or
    circulatory system.
    Contaminant (units): Tetrachloroethylene (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from factories and dry cleaners.
    Health effects language: Some people who drink water containing tetrachloroethylene in
    excess of the MCL over many years could have problems with their liver, and
    may have an increased risk of getting cancer.
    Contaminant (units): 1,2,4-Trichlorobenzene (ppb)
    Traditional MCL in mg/ℓ: 0.07
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 70
    MCLG: 70
    Major sources in drinking water: Discharge from textile-finishing factories.
    Health effects language: Some people who drink water containing 1,2,4-
    trichlorobenzene well in excess of the MCL over many years could experience
    changes in their adrenal glands.
    Contaminant (units): 1,1,1-Trichloroethane (ppb)
    Traditional MCL in mg/ℓ: 0.2
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 200
    MCLG: 200
    Major sources in drinking water: Discharge from metal degreasing sites and other
    factories.
    Health effects language: Some people who drink water containing 1,1,1-trichloroethane
    in excess of the MCL over many years could experience problems with their liver,
    nervous system, or circulatory system.
    Contaminant (units): 1,1,2-Trichloroethane (ppb)
    244
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 3
    Major sources in drinking water: Discharge from industrial chemical factories.
    Health effects language: Some people who drink water containing 1,1,2-trichloroethane
    well in excess of the MCL over many years could have problems with their liver,
    kidneys, or immune systems.
    Contaminant (units): Trichloroethylene (ppb)
    Traditional MCL in mg/ℓ: 0.005
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 5
    MCLG: 0
    Major sources in drinking water: Discharge from metal degreasing sites and other
    factories.
    Health effects language: Some people who drink water containing trichloroethylene in
    excess of the MCL over many years could experience problems with their liver
    and may have an increased risk of getting cancer.
    Contaminant (units): TTHMs (total trihalomethanes) (ppb)
    Traditional MCL in mg/ℓ: 0.10/0.080
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 100/80
    MCLG: N/A
    Major sources in drinking water: Byproduct of drinking water disinfection.
    Health effects language: Some people who drink water containing trihalomethanes in
    excess of the MCL over many years may experience problems with their liver,
    kidneys, or central nervous system, and may have an increased risk of getting
    cancer.
    Contaminant (units): Toluene (ppm)
    Traditional MCL in mg/ℓ: 1
    To convert for CCR, multiply by: --
    MCL in CCR units: 1
    MCLG: 1
    Major sources in drinking water: Discharge from petroleum factories.
    Health effects language: Some people who drink water containing toluene well in excess
    of the MCL over many years could have problems with their nervous system,
    kidneys, or liver.
    Contaminant (units): Vinyl Chloride (ppb)
    Traditional MCL in mg/ℓ: 0.002
    To convert for CCR, multiply by: 1000
    MCL in CCR units: 2
    MCLG: 0
    245
    Major sources in drinking water: Leaching from PVC piping; discharge from plastics
    factories.
    Health effects language: Some people who drink water containing vinyl chloride in
    excess of the MCL over many years may have an increased risk of getting cancer.
    Contaminant (units): Xylenes (ppm)
    Traditional MCL in mg/ℓ: 10
    To convert for CCR, multiply by: --
    MCL in CCR units: 10
    MCLG: 10
    Major sources in drinking water: Discharge from petroleum factories; discharge from
    chemical factories.
    Health effects language: Some people who drink water containing xylenes in excess of
    the MCL over many years could experience damage to their nervous system.
    Key.
    Abbreviation
    Meaning
    AL
    action level
    MCL
    maximum contaminant level
    MCLG
    maximum contaminant level goal
    MFL
    million fibers per liter
    MRDL
    maximum residual disinfectant level
    MRDLG
    maximum residual disinfectant level goal
    mrem/year
    millirems per year (a measure of radiation absorbed by the body)
    N/A
    not applicable
    NTU
    nephelometric turbidity units(a measure of water clarity)
    pCi/ℓ
    picocuries per liter (a measure of radioactivity)
    ppm
    parts per million, or milligrams per liter (mg/ℓ)
    ppb
    parts per billion, or micrograms per liter (μg/ℓ)
    ppt
    parts per trillion, or nanograms per liter
    ppq
    parts per quadrillion, or picograms per liter
    TT
    treatment technique
    BOARD NOTE: Derived from Appendix
    appendix A to Subpart subpart O to 40 CFR 141
    (2003)
    (2006), as amended at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Appendix C
    Common Names of Organic Chemicals
    The following common names are used for certain organic chemicals:
    Common Name
    CAS No.
    CAS Name
    Aldrin
    309-00-2
    1,4,5,8-Dimethanonaphthalene,
    1,2,3,4,10,10-hexachloro-
    246
    1,4,4a,5,8,8a-hexahydro-, (1alpha,
    4alpha, 4abeta, 5alpha, 8alpha,
    8abeta)-
    Bromoform
    75-25-2
    Methane, tribromo-
    Chlordane
    57-74-9
    4,7-Methano-1H-indene,
    1,2,4,5,6,7,8,8-octachloro-
    2,3,3a,4,7,7a-hexahydro-
    Chloroform
    67-66-3
    Methane, trichloro-
    2,4-D
    94-75-7
    Acetic acid, 2,4-dichlorophenoxy-
    DDT
    50-29-3
    Benzene, 1,1’-(2, 2, 2-
    trichloroethylidene) bis(4-chloro-
    Dieldrin
    60-57-1
    2,7:3,6-Dimethanonaphth(2,3-
    b)oxirene, 3,4,5,6,9,9-hexachloro-
    1a,2,2a,3,6,6a,7,7a-octahydro-,
    (1aalpha, 2beta, 2aalpha, 3beta,
    6beta, 6aalpha, 7beta, 7aalpha)-
    Endrin
    72-20-8
    2,7:3,6-Dimethanonaphth(2,3-
    b)oxirene, 3,4,5,6,9,9-hexachloro-
    1a,2,2a,3,6,6a,7,7a-octahydro-,
    (1aalpha, 2beta, 2abeta, 3alpha,
    6alpha, 6abeta, 7beta, 7aalpha)-,
    Heptachlor
    76-44-8
    4,7-Methano-1H-indene,
    1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-
    tetrahydro-
    Heptachlor epoxide
    1024-57-3
    2, 5-Methano-2H-indeno(1,
    2b)oxirene, 2, 3, 4, 5, 6, 7, 7-
    heptachloro-1a, 1b, 5, 5a, 6, 6a-
    hexahydro-, (1a alpha, 1b beta, 2
    alpha, 5 alpha, 5a beta, 6beta, 6a
    alpha)-
    Lindane
    58-89-9
    Cyclohexane, 1,2,3,4,5,6-
    hexachloro-, (1 alpha,2 alpha,3
    beta,4 alpha,5 alpha,6 beta)-
    Methoxychlor
    72-43-5
    Benzene, 1,1’-(2,2,2-
    trichloroethylidene)bis(4-methoxy-
    Silvex (2,4,5-TP)
    93-72-1
    Propanoic acid, 2-(2,4,5-
    trichlorophenoxy)-
    Toxaphene
    8001-35-2
    Toxaphene
    TTHM
    Total trihalomethanes (See Section
    611.101)
    BOARD NOTE: Derived from 40 CFR 141.30 and 261, Appendix
    appendix VIII (2002) (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    247
    Section 611.Appendix G
    NPDWR Violations and Situations Requiring Public Notice
    See note 1 at the end of this Appendix G for an explanation of the Agency’s authority to alter the
    magnitude of a violation from that set forth in the following table.
    MCL/MRDL/TT violations
    2
    Monitoring & testing
    procedure violations
    Contaminant
    Tier of
    public
    notice
    required
    Citation
    Tier of
    public
    notice
    required
    Citation
    I. Violations of National Primary Drinking Water Regulations (NPDWR):
    3
    A. Microbiological Contaminants
    1. Total coliform
    2
    611.325(a)
    3
    611.521-
    611.525
    2. Fecal coliform/E. coli
    1
    611.325(b)
    4
    1, 3
    611.525
    3. Turbidity MCL
    2
    611.320(a)
    3
    611.560
    4. Turbidity MCL (average of
    two days’ samples greater than 5
    NTU)
    5
    2, 1
    611.320(b)
    3
    611.560
    5. Turbidity (for TT violations
    resulting from a single
    exceedence of maximum
    allowable turbidity level)
    6
    2, 1
    611.231(b),
    611.233(b)(1),
    611.250(a)(2),
    611.250(b)(2),
    611.250(c)(2),
    611.250(d),
    611.743(a)(2),
    611.743(b),
    611.955(b)(2)
    3
    611.531(a),
    611.532(b),
    611.533(a),
    611.744,
    611.956(a)(1)-
    (a)(3),
    611.956(b)
    6. Surface Water Treatment
    Rule violations, other than
    violations resulting from single
    exceedence of max. allowable
    turbidity level (TT)
    2
    611.211,
    611.213,
    611.220,
    611.230-
    611.233,
    611.240-
    611.242,
    611.250
    3
    611.531-
    611.533
    7. Interim Enhanced Surface
    Water Treatment Rule
    violations, other than violations
    resulting from single
    exceedence of max. turbidity
    level (TT)
    2
    7
    611.740-
    611.743,
    611.950-
    611.955
    3
    611.742,
    611.744,
    611.953,
    611.954,
    611.956
    248
    8. Filter Backwash Recycling
    Rule violations
    2
    611.276(c)
    3
    611.276(b), (d)
    9. Long Term 1 Enhanced
    Surface Water Treatment Rule
    violations
    2
    611.950-
    611.955
    3
    611.953,
    611.954,
    611.956
    10. LT2ESWTR violations 2
    611.1010-
    611.1020
    22
    2, 3
    611.1001-
    611.1005 and
    611.1008-
    611.1009
    11. Groundwater Rule violations 2
    611.804 3
    611.802(h)
    B. Inorganic Chemicals (IOCs)
    1. Antimony
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    2. Arsenic
    2
    10
    8
    611.301(b)
    3
    9
    11
    611.601,
    611.612(a),
    611.612(b)
    3. Asbestos (fibers greater than
    10 μm)
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.602
    4. Barium
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    5. Beryllium
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    6. Cadmium
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    7. Chromium (total)
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    8. Cyanide
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    9. Fluoride
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    10. Mercury (inorganic)
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    249
    11. Nitrate
    1
    611.301(b)
    10
    12
    1, 3
    611.600,
    611.601,
    611.604,
    611.606
    12. Nitrite
    1
    611.301(b)
    10
    12
    1, 3
    611.600,
    611.601,
    611.605,
    611.606
    13. Total Nitrate and Nitrite
    1
    611.301(b)
    3
    611.600,
    611.601
    14. Selenium
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    15. Thallium
    2
    611.301(b)
    3
    611.600,
    611.601,
    611.603
    C. Lead and Copper Rule (Action Level for lead is 0.015 mg/ℓ, for copper is 1.3 mg/ℓ)
    1. Lead and Copper Rule (TT)
    2
    611.350-
    611.355
    3
    611.356-
    611.359
    D. Synthetic Organic Chemicals (SOCs)
    1. 2,4-D
    2
    611.310(c)
    3
    611.648
    2. 2,4,5-TP (silvex)
    2
    611.310(c)
    3
    611.648
    3. Alachlor
    2
    611.310(c)
    3
    611.648
    4. Atrazine
    2
    611.310(c)
    3
    611.648
    5. Benzo(a)pyrene (PAHs)
    2
    611.310(c)
    3
    611.648
    6. Carbofuran
    2
    611.310(c)
    3
    611.648
    7. Chlordane
    2
    611.310(c)
    3
    611.648
    8. Dalapon
    2
    611.310(c)
    3
    611.648
    9. Di(2-ethylhexyl)adipate
    2
    611.310(c)
    3
    611.648
    10. Di(2-ethylhexyl)phthalate
    2
    611.310(c)
    3
    611.648
    11. Dibromochloropropane
    (DBCP)
    2
    611.310(c)
    3
    611.648
    12. Dinoseb
    2
    611.310(c)
    3
    611.648
    13. Dioxin (2,3,7,8-TCDD)
    2
    611.310(c)
    3
    611.648
    14. Diquat
    2
    611.310(c)
    3
    611.648
    15. Endothall
    2
    611.310(c)
    3
    611.648
    16. Endrin
    2
    611.310(c)
    3
    611.648
    17. Ethylene dibromide
    2
    611.310(c)
    3
    611.648
    18. Glyphosate
    2
    611.310(c)
    3
    611.648
    19. Heptachlor
    2
    611.310(c)
    3
    611.648
    20. Heptachlor epoxide
    2
    611.310(c)
    3
    611.648
    21. Hexachlorobenzene
    2
    611.310(c)
    3
    611.648
    250
    22. Hexachlorocyclopentadiene 2
    611.310(c)
    3
    611.648
    23. Lindane
    2
    611.310(c)
    3
    611.648
    24. Methoxychlor
    2
    611.310(c)
    3
    611.648
    25. Oxamyl (Vydate)
    2
    611.310(c)
    3
    611.648
    26. Pentachlorophenol
    2
    611.310(c)
    3
    611.648
    27. Picloram
    2
    611.310(c)
    3
    611.648
    28. Polychlorinated biphenyls
    (PCBs)
    2
    611.310(c)
    3
    611.648
    29. Simazine
    2
    611.310(c)
    3
    611.648
    30. Toxaphene
    2
    611.310(c)
    3
    611.648
    E. Volatile Organic Chemicals (VOCs)
    1. Benzene
    2
    611.310(a)
    3
    611.646
    2. Carbon tetrachloride
    2
    611.310(a)
    3
    611.646
    3. Chlorobenzene
    (monochlorobenzene)
    2
    611.310(a)
    3
    611.646
    4. o-Dichlorobenzene
    2
    611.310(a)
    3
    611.646
    5. p-Dichlorobenzene
    2
    611.310(a)
    3
    611.646
    6. 1,2-Dichloroethane
    2
    611.310(a)
    3
    611.646
    7. 1,1-Dichloroethylene
    2
    611.310(a)
    3
    611.646
    8. cis-1,2-Dichloroethylene
    2
    611.310(a)
    3
    611.646
    9. trans-1,2-Dichloroethylene
    2
    611.310(a)
    3
    611.646
    10. Dichloromethane
    2
    611.310(a)
    3
    611.646
    11. 1,2-Dichloropropane
    2
    611.310(a)
    3
    611.646
    12. Ethylbenzene
    2
    611.310(a)
    3
    611.646
    13. Styrene
    2
    611.310(a)
    3
    611.646
    14. Tetrachloroethylene
    2
    611.310(a)
    3
    611.646
    15. Toluene
    2
    611.310(a)
    3
    611.646
    16. 1,2,4-Trichlorobenzene
    2
    611.310(a)
    3
    611.646
    17. 1,1,1-Trichloroethane
    2
    611.310(a)
    3
    611.646
    18. 1,1,2-Trichloroethane
    2
    611.310(a)
    3
    611.646
    19. Trichloroethylene
    2
    611.310(a)
    3
    611.646
    20. Vinyl chloride
    2
    611.310(a)
    3
    611.646
    21. Xylenes (total)
    2
    611.310(a)
    3
    611.646
    F. Radioactive Contaminants
    1. Beta/photon emitters
    2
    611.330(d)
    3
    611.720(a),
    611.732
    2. Alpha emitters
    2
    611.330(c)
    3
    611.720(a),
    611.731
    3. Combined radium (226 &
    228)
    2
    611.330(b)
    3
    611.720(a),
    611.731
    4. Uranium
    2
    611.330(e)
    3
    611.720(a),
    611.731
    251
    G. Disinfection Byproducts (DBPs), Byproduct Precursors, Disinfectant Residuals. Where
    disinfection is used in the treatment of drinking water, disinfectants combine with organic and
    inorganic matter present in water to form chemicals called disinfection byproducts (DBPs).
    USEPA sets standards for controlling the levels of disinfectants and DBPs in drinking water,
    including trihalomethanes (THMs) and haloacetic acids (HAAs).
    13
    1. Total trihalomethanes
    (TTHMs)
    2
    611.312(a)
    14
    611.312(b)
    3
    611.382(a)-(b)
    Subparts W and
    Y of this Part
    2. Haloacetic Acids (HAA5)
    2
    611.312(a)
    611.312(b)
    3
    611.382(a)-(b)
    Subpart Y of
    this Part
    3. Bromate
    2
    611.312(a)
    3
    611.382(a)-(b)
    4. Chlorite
    2
    611.312(a)
    3
    611.382(a)-(b)
    5. Chlorine (MRDL)
    2
    611.313(a)
    3
    611.382(a), (c)
    6. Chloramine (MRDL)
    2
    611.313(a)
    3
    611.382(a), (c)
    7. Chlorine dioxide (MRDL),
    where any two consecutive daily
    samples at entrance to
    distribution system only are
    above MRDL
    2
    611.313(a),
    611.383(c)(3)
    2
    15
    , 3
    611.382(a), (c),
    611.383(c)(2)
    8. Chlorine dioxide (MRDL),
    where samples in distribution
    system the next day are also
    above MRDL
    16
    1
    611.313(a),
    611.383(c)(3)
    1
    611.382(a), (c),
    611.383(c)(2)
    9. Control of DBP precursors--
    TOC (TT)
    2
    611.385(a)-(b)
    3
    611.382(a), (d)
    10. Benchmarking and
    disinfection profiling
    N/A
    N/A
    3
    611.742,
    611.953,
    611.954
    11. Development of monitoring
    plan
    N/A
    N/A
    3
    611.382(f)
    H. Other Treatment Techniques
    1. Acrylamide (TT)
    2
    611.296
    N/A
    N/A
    2. Epichlorohydrin (TT)
    2
    611.296
    N/A
    N/A
    II. Unregulated Contaminant Monitoring:
    17
    A. Unregulated contaminants
    N/A
    N/A
    3
    611.510
    B. Nickel
    N/A
    N/A
    3
    611.603,
    611.611
    252
    III. Public Notification for Relief Equivalent to a SDWA section 1415 Variance or a section
    1416 Exemption.
    A. Operation under relief
    equivalent to a SDWA section
    1415 variance or a section 1416
    exemption
    3
    18
    1415, 1416
    N/A
    N/A
    B. Violation of conditions of
    relief equivalent to a SDWA
    section 1415 variance or a
    section 1416 exemption
    2
    1415, 1416,
    19
    611.111,
    611.112
    N/A
    N/A
    IV. Other Situations Requiring Public Notification.
    A. Fluoride secondary
    maximum contaminant level
    (SMCL) exceedence
    3
    611.858
    N/A
    N/A
    B. Exceedence of nitrate MCL
    for a non-CWS supplier, as
    allowed by the Agency
    1
    611.300(d)
    N/A
    N/A
    C. Availability of unregulated
    contaminant monitoring data
    3
    611.510
    N/A
    N/A
    D. Waterborne disease outbreak 1
    611.101,
    611.233(b)(2)
    N/A
    N/A
    E. Other waterborne
    emergency
    20
    1
    N/A
    N/A
    N/A
    F. Source water sample positive
    for Groundwater Rule fecal
    indicators: E. coli, enterococci,
    or coliphage
    1
    611.802(g)
    N/A
    N/A
    F. G. Other situations as
    determined by the Agency by a
    SEP issued pursuant to Section
    611.110
    21
    1, 2, 3
    N/A
    N/A
    N/A
    Appendix G--Endnotes
    1. Violations and other situations not listed in this table (e.g., failure to prepare Consumer
    Confidence Reports) do not require notice, unless otherwise determined by the Agency by a SEP
    issued pursuant to Section 611.110. The Agency may, by a SEP issued pursuant to Section
    611.110, further require a more stringent public notice tier (e.g., Tier 1 instead of Tier 2 or Tier 2
    instead of Tier 3) for specific violations and situations listed in this Appendix, as authorized
    under Sections 611.902(a) and 611.903(a).
    2. Definition of the abbreviations used: “MCL” means maximum contaminant level, “MRDL”
    means maximum residual disinfectant level, and “TT” means treatment technique.
    253
    3. The term “violations of National Primary Drinking Water Regulations (NPDWR)” is used
    here to include violations of MCL, MRDL, treatment technique, monitoring, and testing
    procedure requirements.
    4. Failure to test for fecal coliform or E. coli is a Tier 1 violation if testing is not done after any
    repeat sample tests positive for coliform. All other total coliform monitoring and testing
    procedure violations are Tier 3 violations.
    5. A supplier that violates the turbidity MCL of 5 NTU based on an average of measurements
    over two consecutive days must consult with the Agency within 24 hours after learning of the
    violation. Based on this consultation, the Agency may subsequently decide to issue a SEP
    pursuant to Section 611.110 that elevates the violation to a Tier 1 violation. If a supplier is
    unable to make contact with the Agency in the 24-hour period, the violation is automatically
    elevated to a Tier 1 violation.
    6. A supplier with a treatment technique violation involving a single exceedence of a maximum
    turbidity limit under the Surface Water Treatment Rule (SWTR), the Interim Enhanced Surface
    Water Treatment Rule (IESWTR), or the Long Term 1 Enhanced Surface Water Treatment Rule
    are required to consult with the Agency within 24 hours after learning of the violation. Based on
    this consultation, the Agency may subsequently decide to issue a SEP pursuant to Section
    611.110 that elevates the violation to a Tier 1 violation. If a supplier is unable to make contact
    with the Agency in the 24-hour period, the violation is automatically elevated to a Tier 1
    violation.
    7. The Surface Water Treatment Rule (SWTR) remains in effect for a supplier serving
    that
    serves at least 10,000 persons; the Interim Enhanced Surface Water Treatment Rule adds
    additional requirements and does not in many cases supercede the SWTR.
    8. The arsenic MCL citations are effective January 23, 2006. Until then, the citations are
    Sections 611.330(b) and 611.612(c).This endnote 8 corresponds with the endnote to the table in
    appendix A to subpart Q of 40 CFR 141 (2006), which stated a past effective date. This
    statement maintains structural consistency with the federal regulations.
    9. The arsenic Tier 3 violation MCL citations are effective January 23, 2006. Until then, the
    citations are Sections 611.100, 611.101, and 611.612.This endnote 8 corresponds with the
    endnote to the table in appendix A to subpart Q of 40 CFR 141 (2006), which stated a past
    effective date. This statement maintains structural consistency with the federal regulations.
    10. Failure to take a confirmation sample within 24 hours for nitrate or nitrite after an initial
    sample exceeds the MCL is a Tier 1 violation. Other monitoring violations for nitrate are Tier 3.
    11. This endnote 11 corresponds with the endnote to the table in Appendix
    appendix A to
    Subpart
    subpart Q of 40 CFR 141 (2003) (2006), which stated a past effective date. This
    statement maintains structural consistency with the federal regulations.
    12. This endnote 12 corresponds with the endnote to the table in Appendix A to Subpart Q of 40
    254
    CFR 141 (2003), which stated a past effective date. This statement maintains structural
    consistency with the federal regulations. Failure to take a confirmation sample within 24 hours
    for nitrate or nitrite after an initial sample exceeds the MCL is a Tier 1 violation. Other
    monitoring violations for nitrate are Tier 3.
    13. A Subpart B community or non-transient non-community system supplier must comply with
    new DBP MCLs, disinfectant MRDLs, and related monitoring requirements. A Subpart B
    transient non-community system supplier serving
    that serves10,000 or more persons that uses
    chlorine dioxide as a disinfectant or oxidant or a Subpart B transient non-community system
    supplier that serves fewer than 10,000 persons, which uses only groundwater not under the direct
    influence of surface water, and which uses chlorine dioxide as a disinfectant or oxidant must
    comply with the chlorine dioxide MRDL.
    14. This endnote 14 corresponds with the endnote to the table in Appendix A to Subpart Q of 40
    CFR 141 (2003), which stated a past effective date. This statement maintains structural
    consistency with the federal regulations.Sections 611.312(b)(1) and 611.382(a) and (b) apply
    until Subpart Y of this Part takes effect under the schedule set forth in Section 611.970(c).
    15. Failure to monitor for chlorine dioxide at the entrance to the distribution system the day after
    exceeding the MRDL at the entrance to the distribution system is a Tier 2 violation.
    16. If any daily sample taken at the entrance to the distribution system exceeds the MRDL for
    chlorine dioxide and one or more samples taken in the distribution system the next day exceed
    the MRDL, Tier 1 notification is required. A failure to take the required samples in the
    distribution system after the MRDL is exceeded at the entry point also triggers Tier 1
    notification.
    17. Some water suppliers must monitor for certain unregulated contaminants listed in Section
    611.510.
    18. This citation refers to sections 1415 and 1416 of the federal Safe Drinking Water Act.
    sections 1415 and 1416 require that “a schedule prescribed . . . for a public water system granted
    relief equivalent to a SDWA section 1415 variance or a section 1416 exemption must require
    compliance by the system . . ..”
    19. In addition to sections 1415 and 1416 of the federal Safe Drinking Water Act, 40 CFR
    142.307 specifies the items and schedule milestones that must be included in relief equivalent to
    a SDWA section 1415 small system variance. In granting any form of relief from an NPDWR,
    the Board will consider all applicable federal requirements for and limitations on the State’s
    ability to grant relief consistent with federal law.
    20. Other waterborne emergencies require a Tier 1 public notice under Section 611.902(a) for
    situations that do not meet the definition of a waterborne disease outbreak given in Section
    611.101, but which still have the potential to have serious adverse effects on health as a result of
    short-term exposure. These could include outbreaks not related to treatment deficiencies, as well
    as situations that have the potential to cause outbreaks, such as failures or significant interruption
    255
    in water treatment processes, natural disasters that disrupt the water supply or distribution
    system, chemical spills, or unexpected loading of possible pathogens into the source water.
    21. The Agency may place any other situation in any tier it deems appropriate in writing, based
    on the prospective threat which it determines that the situation poses to public health, and subject
    to Board review pursuant to Section 40 of the Act [415 ILCS 5/40].
    22. A failure to collect three or more samples for Cryptosporidium analysis is a Tier 2 violation
    requiring special notice, as specified in Section 611.911. All other monitoring and testing
    procedure violations are Tier 3.
    BOARD NOTE: Derived from Appendix A to Subpart Q to 40 CFR 141 (2003)
    (2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Appendix H
    Standard Health Effects Language for Public Notification
    Contaminant
    MCLG
    1
    mg/ℓ
    MCL
    2
    mg/ℓ
    Standard health effects language
    for public notification
    National Primary Drinking Water Regulations (NPDWR):
    A. Microbiological Contaminants
    1a. Total coliform
    Zero
    See footnote
    3
    Coliforms are bacteria that are
    naturally present in the
    environment and are used as an
    indicator that other, potentially-
    harmful, bacteria may be present.
    Coliforms were found in more
    samples than allowed and this was
    a warning of potential problems.
    1b. Fecal coliform/E. coli
    Zero
    Zero
    Fecal coliforms and E. coli are
    bacteria whose presence indicates
    that the water may be contaminated
    with human or animal wastes.
    Microbes in these wastes can cause
    short-term effects, such as diarrhea,
    cramps, nausea, headaches, or other
    symptoms. They may pose a
    special health risk for infants,
    young children, some of the
    elderly, and people with severely
    compromised immune systems.
    256
    1c. Fecal indicators (GWR):
    i. E. coli
    ii. enterococci
    iii. coliphage
    Zero
    None
    None
    TT
    TT
    TT
    Fecal indicators are microbes
    whose presence indicates that the
    water may be contaminated with
    human or animal wastes. Microbes
    in these wastes can cause short-
    term health effects, such as
    diarrhea, cramps, nausea,
    headaches, or other symptoms.
    They may pose a special health risk
    for infants, young children, some of
    the elderly, and people with
    severely compromised immune
    systems.
    1d. Groundwater Rule TT
    violations
    None
    TT
    Inadequately treated or
    inadequately protected water may
    contain disease-causing organisms.
    These organisms can cause
    symptoms such as diarrhea, nausea,
    cramps, and associated headaches.
    2a. Turbidity (MCL)
    4
    None
    1 NTU
    5
    /
    5 NTU
    Turbidity has no health effects.
    However, turbidity can interfere
    with disinfection and provide a
    medium for microbial growth.
    Turbidity may indicate the
    presence of disease-causing
    organisms. These organisms
    include bacteria, viruses, and
    parasites that can cause symptoms
    such as nausea, cramps, diarrhea,
    and associated headaches.
    2b. Turbidity (SWTR TT)
    None
    TT
    7
    Turbidity has no health effects.
    However,
    6
    turbidity can interfere
    with disinfection and provide a
    medium for microbial growth.
    Turbidity may indicate the
    presence of disease-causing
    organisms. These organisms
    include bacteria, viruses, and
    parasites that can cause symptoms
    such as nausea, cramps, diarrhea,
    and associated headaches.
    257
    2c. Turbidity (IESWTR TT
    and LT1ESWTR TT)
    None
    TT
    Turbidity has no health effects.
    However,
    8
    turbidity can interfere
    with disinfection and provide a
    medium for microbial growth.
    Turbidity may indicate the
    presence of disease-causing
    organisms. These organisms
    include bacteria, viruses, and
    parasites that can cause symptoms
    such as nausea, cramps, diarrhea,
    and associated headaches.
    B. Surface Water Treatment Rule (SWTR), Interim Enhanced Surface Water Treatment Rule
    (IESWTR), Long Term 1 Enhanced Surface Water Treatment Rule (LT1ESWTR), and Filter
    Backwash Recycling Rule (FBRR) violations:
    3. Giardia lamblia
    (SWTR/IESWTR/
    LT1ESWTR)
    Zero
    TT
    10
    Inadequately treated water may
    contain disease-causing organisms.
    These organisms include bacteria,
    viruses, and parasites that can
    cause symptoms such as nausea,
    cramps, diarrhea, and associated
    headaches.
    4. Viruses
    (SWTR/IESWTR/
    LT1ESWTR)
    Inadequately treated water may
    contain disease-causing organisms.
    These organisms include bacteria,
    viruses, and parasites that can
    cause symptoms such as nausea,
    cramps, diarrhea, and associated
    headaches.
    5. Heterotrophic plate count
    (HPC) bacteria
    9
    (SWTR/IESWTR/
    LT1ESWTR)
    Inadequately treated water may
    contain disease-causing organisms.
    These organisms include bacteria,
    viruses, and parasites that can
    cause symptoms such as nausea,
    cramps, diarrhea, and associated
    headaches.
    6. Legionella
    (SWTR/IESWTR/
    LT1ESWTR)
    Inadequately treated water may
    contain disease-causing organisms.
    These organisms include bacteria,
    viruses, and parasites that can
    cause symptoms such as nausea,
    cramps, diarrhea, and associated
    headaches.
    258
    7. Cryptosporidium
    (IESWTR/FBRR/
    LT1ESWTR)
    Inadequately treated water may
    contain disease-causing organisms.
    These organisms include bacteria,
    viruses, and parasites that can
    cause symptoms such as nausea,
    cramps, diarrhea, and associated
    headaches.
    C. Inorganic Chemicals (IOCs)
    8. Antimony
    0.006
    0.006
    Some people who drink water
    containing antimony well in excess
    of the MCL over many years could
    experience increases in blood
    cholesterol and decreases in blood
    sugar.
    9. Arsenic
    11
    0
    0.010
    Some people who drink water
    containing arsenic in excess of the
    MCL over many years could
    experience skin damage or
    problems with their circulatory
    system, and may have an increased
    risk of getting cancer.
    10. Asbestos (10 μm)
    7 MFL
    12
    7 MFL
    Some people who drink water
    containing asbestos in excess of the
    MCL over many years may have an
    increased risk of developing benign
    intestinal polyps.
    11. Barium
    2
    2
    Some people who drink water
    containing barium in excess of the
    MCL over many years could
    experience an increase in their
    blood pressure.
    12. Beryllium
    0.004
    0.004
    Some people who drink water
    containing beryllium well in excess
    of the MCL over many years could
    develop intestinal lesions.
    13. Cadmium
    0.005
    0.005
    Some people who drink water
    containing cadmium in excess of
    the MCL over many years could
    experience kidney damage.
    14. Chromium (total)
    0.1
    0.1
    Some people who use water
    containing chromium well in
    excess of the MCL over many
    years could experience allergic
    dermatitis.
    259
    15. Cyanide
    0.2
    0.2
    Some people who drink water
    containing cyanide well in excess
    of the MCL over many years could
    experience nerve damage or
    problems with their thyroid.
    16. Fluoride
    4.0
    4.0
    Some people who drink water
    containing fluoride in excess of the
    MCL over many years could get
    bone disease, including pain and
    tenderness of the bones. Fluoride in
    drinking water at half the MCL or
    more may cause mottling of
    children’s teeth, usually in children
    less than nine years old. Mottling,
    also known as dental fluorosis, may
    include brown staining or pitting of
    the teeth, and occurs only in
    developing teeth before they erupt
    from the gums.
    17. Mercury (inorganic)
    0.002
    0.002
    Some people who drink water
    containing inorganic mercury well
    in excess of the MCL over many
    years could experience kidney
    damage.
    18. Nitrate
    10
    10
    Infants below the age of six months
    who drink water containing nitrate
    in excess of the MCL could
    become seriously ill and, if
    untreated, may die. Symptoms
    include shortness of breath and
    blue baby syndrome.
    19. Nitrite
    1
    1
    Infants below the age of six months
    who drink water containing nitrite
    in excess of the MCL could
    become seriously ill and, if
    untreated, may die. Symptoms
    include shortness of breath and
    blue baby syndrome.
    20. Total Nitrate and Nitrite
    10
    10
    Infants below the age of six months
    who drink water containing nitrate
    and nitrite in excess of the MCL
    could become seriously ill and, if
    untreated, may die. Symptoms
    include shortness of breath and
    blue baby syndrome.
    260
    21. Selenium
    0.05
    0.05
    Selenium is an essential nutrient.
    However, some people who drink
    water containing selenium in
    excess of the MCL over many
    years could experience hair or
    fingernail losses, numbness in
    fingers or toes, or problems with
    their circulation.
    22. Thallium
    0.0005
    0.002
    Some people who drink water
    containing thallium in excess of the
    MCL over many years could
    experience hair loss, changes in
    their blood, or problems with their
    kidneys, intestines, or liver.
    D. Lead and Copper Rule
    23. Lead
    Zero
    TT
    13
    Infants and children who drink
    water containing lead in excess of
    the action level could experience
    delays in their physical or mental
    development. Children could show
    slight deficits in attention span and
    learning abilities. Adults who drink
    this water over many years could
    develop kidney problems or high
    blood pressure.
    24. Copper
    1.3
    TT
    14
    Copper is an essential nutrient, but
    some people who drink water
    containing copper in excess of the
    action level over a relatively short
    amount of time could experience
    gastrointestinal distress. Some
    people who drink water containing
    copper in excess of the action level
    over many years could suffer liver
    or kidney damage. People with
    Wilson’s Disease should consult
    their personal doctor.
    E. Synthetic Organic Chemicals (SOCs)
    25. 2,4-D
    0.07
    0.07
    Some people who drink water
    containing the weed killer 2,4-D
    well in excess of the MCL over
    many years could experience
    problems with their kidneys, liver,
    or adrenal glands.
    261
    26. 2,4,5-TP (silvex)
    0.05
    0.05
    Some people who drink water
    containing silvex in excess of the
    MCL over many years could
    experience liver problems.
    27. Alachlor
    Zero
    0.002
    Some people who drink water
    containing alachlor in excess of the
    MCL over many years could have
    problems with their eyes, liver,
    kidneys, or spleen, or experience
    anemia, and may have an increased
    risk of getting cancer.
    28. Atrazine
    0.003
    0.003
    Some people who drink water
    containing atrazine well in excess
    of the MCL over many years could
    experience problems with their
    cardiovascular system or
    reproductive difficulties.
    29. Benzo(a)pyrene
    (PAHs).
    Zero
    0.0002
    Some people who drink water
    containing benzo(a)pyrene in
    excess of the MCL over many
    years may experience reproductive
    difficulties and may have an
    increased risk of getting cancer.
    30. Carbofuran
    0.04
    0.04
    Some people who drink water
    containing carbofuran in excess of
    the MCL over many years could
    experience problems with their
    blood, or nervous or reproductive
    systems.
    31. Chlordane
    Zero
    0.002
    Some people who drink water
    containing chlordane in excess of
    the MCL over many years could
    experience problems with their
    liver or nervous system, and may
    have an increased risk of getting
    cancer.
    32. Dalapon
    0.2
    0.2
    Some people who drink water
    containing dalapon well in excess
    of the MCL over many years could
    experience minor kidney changes.
    262
    33. Di(2-ethylhexyl)adipate
    0.4
    0.4
    Some people who drink water
    containing di(2-ethylhexyl)adipate
    well in excess of the MCL over
    many years could experience toxic
    effects, such as weight loss, liver
    enlargement, or possible
    reproductive difficulties.
    34. Di(2-ethylhexyl)-
    phthalate
    Zero
    0.006
    Some people who drink water
    containing di(2-
    ethylhexyl)phthalate well in excess
    of the MCL over many years may
    have problems with their liver or
    experience reproductive
    difficulties, and they may have an
    increased risk of getting cancer.
    35. Dibromochloropropane
    (DBCP)
    Zero
    0.0002
    Some people who drink water
    containing DBCP in excess of the
    MCL over many years could
    experience reproductive difficulties
    and may have an increased risk of
    getting cancer.
    36. Dinoseb
    0.007
    0.007
    Some people who drink water
    containing dinoseb well in excess
    of the MCL over many years could
    experience reproductive
    difficulties.
    37. Dioxin (2,3,7,8-TCDD)
    Zero
    3 x 10
    -8
    Some people who drink water
    containing dioxin in excess of the
    MCL over many years could
    experience reproductive difficulties
    and may have an increased risk of
    getting cancer.
    38. Diquat
    0.02
    0.02
    Some people who drink water
    containing diquat in excess of the
    MCL over many years could get
    cataracts.
    39. Endothall
    0.1
    0.1
    Some people who drink water
    containing endothall in excess of
    the MCL over many years could
    experience problems with their
    stomach or intestines.
    40. Endrin
    0.002
    0.002
    Some people who drink water
    containing endrin in excess of the
    MCL over many years could
    experience liver problems.
    263
    41. Ethylene dibromide
    Zero
    0.00005
    Some people who drink water
    containing ethylene dibromide in
    excess of the MCL over many
    years could experience problems
    with their liver, stomach,
    reproductive system, or kidneys,
    and may have an increased risk of
    getting cancer.
    42. Glyphosate
    0.7
    0.7
    Some people who drink water
    containing glyphosate in excess of
    the MCL over many years could
    experience problems with their
    kidneys or reproductive difficulties.
    43. Heptachlor
    Zero
    0.0004
    Some people who drink water
    containing heptachlor in excess of
    the MCL over many years could
    experience liver damage and may
    have an increased risk of getting
    cancer.
    44. Heptachlor epoxide
    Zero
    0.0002
    Some people who drink water
    containing heptachlor epoxide in
    excess of the MCL over many
    years could experience liver
    damage, and may have an increased
    risk of getting cancer.
    45. Hexachlorobenzene
    Zero
    0.001
    Some people who drink water
    containing hexachlorobenzene in
    excess of the MCL over many
    years could experience problems
    with their liver or kidneys, or
    adverse reproductive effects, and
    may have an increased risk of
    getting cancer.
    46. Hexachlorocyclopenta-
    diene
    0.05
    0.05
    Some people who drink water
    containing
    hexachlorocyclopentadiene well in
    excess of the MCL over many
    years could experience problems
    with their kidneys or stomach.
    47. Lindane
    0.0002
    0.0002
    Some people who drink water
    containing lindane in excess of the
    MCL over many years could
    experience problems with their
    kidneys or liver.
    264
    48. Methoxychlor
    0.04
    0.04
    Some people who drink water
    containing methoxychlor in excess
    of the MCL over many years could
    experience reproductive
    difficulties.
    49. Oxamyl (Vydate)
    0.2
    0.2
    Some people who drink water
    containing oxamyl in excess of the
    MCL over many years could
    experience slight nervous system
    effects.
    50. Pentachlorophenol
    Zero
    0.001
    Some people who drink water
    containing pentachlorophenol in
    excess of the MCL over many
    years could experience problems
    with their liver or kidneys, and may
    have an increased risk of getting
    cancer.
    51. Picloram
    0.5
    0.5
    Some people who drink water
    containing picloram in excess of
    the MCL over many years could
    experience problems with their
    liver.
    52. Polychlorinated
    biphenyls (PCBs)
    Zero
    0.0005
    Some people who drink water
    containing PCBs in excess of the
    MCL over many years could
    experience changes in their skin,
    problems with their thymus gland,
    immune deficiencies, or
    reproductive or nervous system
    difficulties, and may have an
    increased risk of getting cancer.
    53. Simazine
    0.004
    0.004
    Some people who drink water
    containing simazine in excess of
    the MCL over many years could
    experience problems with their
    blood.
    54. Toxaphene
    Zero
    0.003
    Some people who drink water
    containing toxaphene in excess of
    the MCL over many years could
    have problems with their kidneys,
    liver, or thyroid, and may have an
    increased risk of getting cancer.
    265
    F. Volatile Organic Chemicals (VOCs)
    55. Benzene
    Zero
    0.005
    Some people who drink water
    containing benzene in excess of the
    MCL over many years could
    experience anemia or a decrease in
    blood platelets, and may have an
    increased risk of getting cancer.
    56. Carbon tetrachloride
    Zero
    0.005
    Some people who drink water
    containing carbon tetrachloride in
    excess of the MCL over many
    years could experience problems
    with their liver and may have an
    increased risk of getting cancer.
    57. Chlorobenzene
    (monochlorobenzene)
    0.1
    0.1
    Some people who drink water
    containing chlorobenzene in excess
    of the MCL over many years could
    experience problems with their
    liver or kidneys.
    58. o-Dichlorobenzene
    0.6
    0.6
    Some people who drink water
    containing o-dichlorobenzene well
    in excess of the MCL over many
    years could experience problems
    with their liver, kidneys, or
    circulatory systems.
    59. p-Dichlorobenzene
    0.075
    0.075
    Some people who drink water
    containing p-dichlorobenzene in
    excess of the MCL over many
    years could experience anemia,
    damage to their liver, kidneys, or
    spleen, or changes in their blood.
    60. 1,2-Dichloroethane
    Zero
    0.005
    Some people who drink water
    containing 1,2-dichloroethane in
    excess of the MCL over many
    years may have an increased risk of
    getting cancer.
    61. 1,1-Dichloroethylene
    0.007
    0.007
    Some people who drink water
    containing 1,1-dichloroethylene in
    excess of the MCL over many
    years could experience problems
    with their liver.
    62. cis-1,2-
    Dichloroethylene
    0.07
    0.07
    Some people who drink water
    containing cis-1,2-dichloroethylene
    in excess of the MCL over many
    years could experience problems
    with their liver.
    266
    63. trans-1,2-
    Dichloroethylene
    0.1
    0.1
    Some people who drink water
    containing trans-1,2-
    dichloroethylene well in excess of
    the MCL over many years could
    experience problems with their
    liver.
    64. Dichloromethane
    Zero
    0.005
    Some people who drink water
    containing dichloromethane in
    excess of the MCL over many
    years could have liver problems
    and may have an increased risk of
    getting cancer.
    65. 1,2-Dichloropropane
    Zero
    0.005
    Some people who drink water
    containing 1,2-dichloropropane in
    excess of the MCL over many
    years may have an increased risk of
    getting cancer.
    66. Ethylbenzene
    0.7
    0.7
    Some people who drink water
    containing ethylbenzene well in
    excess of the MCL over many
    years could experience problems
    with their liver or kidneys.
    67. Styrene
    0.1
    0.1
    Some people who drink water
    containing styrene well in excess of
    the MCL over many years could
    have problems with their liver,
    kidneys, or circulatory system.
    68. Tetrachloroethylene
    Zero
    0.005
    Some people who drink water
    containing tetrachloroethylene in
    excess of the MCL over many
    years could have problems with
    their liver, and may have an
    increased risk of getting cancer.
    69. Toluene
    1
    1
    Some people who drink water
    containing toluene well in excess of
    the MCL over many years could
    have problems with their nervous
    system, kidneys, or liver.
    70. 1,2,4-Trichlorobenzene
    0.07
    0.07
    Some people who drink water
    containing 1,2,4-trichlorobenzene
    well in excess of the MCL over
    many years could experience
    changes in their adrenal glands.
    267
    71. 1,1,1-Trichloroethane
    0.2
    0.2
    Some people who drink water
    containing 1,1,1-trichloroethane in
    excess of the MCL over many
    years could experience problems
    with their liver, nervous system, or
    circulatory system.
    72. 1,1,2-Trichloroethane
    0.003
    0.005
    Some people who drink water
    containing 1,1,2-trichloroethane
    well in excess of the MCL over
    many years could have problems
    with their liver, kidneys, or
    immune systems.
    73. Trichloroethylene
    Zero
    0.005
    Some people who drink water
    containing trichloroethylene in
    excess of the MCL over many
    years could experience problems
    with their liver and may have an
    increased risk of getting cancer.
    74. Vinyl chloride
    Zero
    0.002
    Some people who drink water
    containing vinyl chloride in excess
    of the MCL over many years may
    have an increased risk of getting
    cancer.
    75. Xylenes (total)
    10
    10
    Some people who drink water
    containing xylenes in excess of the
    MCL over many years could
    experience damage to their nervous
    system.
    G. Radioactive Contaminants
    76. Beta/photon emitters
    Zero
    4 mrem/yr
    15
    Certain minerals are radioactive
    and may emit forms of radiation
    known as photons and beta
    radiation. Some people who drink
    water containing beta and photon
    emitters in excess of the MCL over
    many years may have an increased
    risk of getting cancer.
    77. Alpha emitters
    Zero
    15 pCi/ℓ
    1617
    Certain minerals are radioactive
    and may emit a form of radiation
    known as alpha radiation. Some
    people who drink water containing
    alpha emitters in excess of the
    MCL over many years may have an
    increased risk of getting cancer.
    268
    78. Combined radium (226
    & 228)
    Zero
    5 pCi/ℓ
    Some people who drink water
    containing radium 226 or 228 in
    excess of the MCL over many
    years may have an increased risk of
    getting cancer.
    79. Uranium
    Zero
    30
    μg/ℓ
    Some people who drink water
    containing uranium in excess of the
    MCL over many years may have an
    increased risk of getting cancer and
    kidney toxicity.
    H. Disinfection Byproducts (DBPs), Byproduct Precursors, and Disinfectant Residuals: Where
    disinfection is used in the treatment of drinking water, disinfectants combine with organic and
    inorganic matter present in water to form chemicals called disinfection byproducts (DBPs).
    USEPA sets standards for controlling the levels of disinfectants and DBPs in drinking water,
    including trihalomethanes (THMs) and haloacetic acids (HAA5)
    18
    80. Total trihalomethanes
    (TTHMs)
    N/A
    0.080
    19, 20
    Some people who drink water
    containing trihalomethanes in
    excess of the MCL over many
    years may experience problems
    with their liver, kidneys, or central
    nervous system, and may have an
    increased risk of getting cancer.
    81. Haloacetic Acids
    (HAA5)
    N/A
    0.060
    21
    Some people who drink water
    containing haloacetic acids in
    excess of the MCL over many
    years may have an increased risk of
    getting cancer.
    82. Bromate
    Zero
    0.010
    Some people who drink water
    containing bromate in excess of the
    MCL over many years may have an
    increased risk of getting cancer.
    83. Chlorite
    0.08
    1.0
    Some infants and young children
    who drink water containing chlorite
    in excess of the MCL could
    experience nervous system effects.
    Similar effects may occur in fetuses
    of pregnant women who drink
    water containing chlorite in excess
    of the MCL. Some people may
    experience anemia.
    269
    84. Chlorine
    4
    (MRDLG)
    22
    4.0
    (MRDL)
    23
    Some people who use water
    containing chlorine well in excess
    of the MRDL could experience
    irritating effects to their eyes and
    nose. Some people who drink water
    containing chlorine well in excess
    of the MRDL could experience
    stomach discomfort.
    85. Chloramines
    4 (MRDLG) 4.0 (MRDL) Some people who use water
    containing chloramines well in
    excess of the MRDL could
    experience irritating effects to their
    eyes and nose. Some people who
    drink water containing chloramines
    well in excess of the MRDL could
    experience stomach discomfort or
    anemia.
    85a. Chlorine dioxide,
    where any two consecutive
    daily samples taken at the
    entrance to the distribution
    system are above the
    MRDL
    0.8
    (MRDLG)
    0.8 (MRDL) Some infants and young children
    who drink water containing
    chlorine dioxide in excess of the
    MRDL could experience nervous
    system effects. Similar effects may
    occur in fetuses of pregnant women
    who drink water containing
    chlorine dioxide in excess of the
    MRDL. Some people may
    experience anemia.
    Add for public notification only:
    The chlorine dioxide violations
    reported today are the result of
    exceedences at the treatment
    facility only, not within the
    distribution system that delivers
    water to consumers. Continued
    compliance with chlorine dioxide
    levels within the distribution
    system minimizes the potential risk
    of these violations to consumers.
    270
    86a. Chlorine dioxide,
    where one or more
    distribution system samples
    are above the MRDL
    0.8
    (MRDLG)
    0.8 (MRDL) Some infants and young children
    who drink water containing
    chlorine dioxide in excess of the
    MRDL could experience nervous
    system effects. Similar effects may
    occur in fetuses of pregnant women
    who drink water containing
    chlorine dioxide in excess of the
    MRDL. Some people may
    experience anemia.
    Add for public notification only:
    The chlorine dioxide violations
    reported today include exceedences
    of the USEPA standard within the
    distribution system that delivers
    water to consumers. Violations of
    the chlorine dioxide standard
    within the distribution system may
    harm human health based on short-
    term exposures. Certain groups,
    including fetuses, infants, and
    young children, may be especially
    susceptible to nervous system
    effects from excessive chlorine
    dioxide exposure.
    87. Control of DBP
    precursors (TOC)
    None
    TT
    Total organic carbon (TOC) has no
    health effects. However, total
    organic carbon provides a medium
    for the formation of disinfection
    byproducts. These byproducts
    include trihalomethanes (THMs)
    and haloacetic acids (HAAs).
    Drinking water containing these
    byproducts in excess of the MCL
    may lead to adverse health effects,
    liver or kidney problems, or
    nervous system effects, and may
    lead to an increased risk of getting
    cancer.
    271
    I. Other Treatment Techniques:
    88. Acrylamide
    Zero
    TT
    Some people who drink water
    containing high levels of
    acrylamide over a long period of
    time could have problems with
    their nervous system or blood, and
    may have an increased risk of
    getting cancer.
    89. Epichlorohydrin
    Zero
    TT
    Some people who drink water
    containing high levels of
    epichlorohydrin over a long period
    of time could experience stomach
    problems, and may have an
    increased risk of getting cancer.
    Appendix H--Endnotes
    1. “MCLG” means maximum contaminant level goal.
    2. “MCL” means maximum contaminant level.
    3. For a water supplier analyzing at least 40 samples per month, no more than 5.0 percent of the
    monthly samples may be positive for total coliforms. For a supplier analyzing fewer than 40
    samples per month, no more than one sample per month may be positive for total coliforms.
    4. There are various regulations that set turbidity standards for different types of systems,
    including Section 611.320, the 1989 Surface Water Treatment Rule (SWTR), the 1998 Interim
    Enhanced Surface Water Treatment Rule (IESWTR), and the 2002 Long Term 1 Enhanced
    Surface Water Treatment Rule (LT1ESWTR). The MCL for the monthly turbidity average is 1
    NTU; the MCL for the 2-day average is 5 NTU for a supplier that is required to filter but has not
    yet installed filtration (Section 611.320).
    5. “NTU” means nephelometric turbidity unit.
    6. There are various regulations that set turbidity standards for different types of systems,
    including Section 611.320, the 1989 SWTR, the 1998 IESWTR, and the 2002 LT1ESWTR. A
    supplier subject to the SWTR (both filtered and unfiltered) may not exceed 5 NTU. In addition,
    in filtered systems, 95 percent of samples each month must not exceed 0.5 NTU in systems using
    conventional or direct filtration and must not exceed 1 NTU in systems using slow sand or
    diatomaceous earth filtration or other filtration technologies approved by the Agency.
    7. “TT” means treatment technique.
    8. There are various regulations that set turbidity standards for different types of systems,
    including Section 611.320, the 1989 SWTR, the 1998 IESWTR, and the 2002 LT1ESWTR. For
    a supplier subject to the IESWTR (systems serving
    a supplier that serves at least 10,000 people,
    272
    using surface water or groundwater under the direct influence of surface water), that use
    conventional filtration or direct filtration, the turbidity level of a system’s combined filter
    effluent may not exceed 0.3 NTU in at least 95 percent of monthly measurements, and the
    turbidity level of a system’s combined filter effluent must not exceed 1 NTU at any time. A
    supplier subject to the IESWTR using technologies other than conventional, direct, slow sand, or
    diatomaceous earth filtration must meet turbidity limits set by the Agency. For a supplier subject
    to the LT1ESWTR (a supplier that serves fewer than 10,000 people, using surface water or
    groundwater under the direct influence of surface water) that uses conventional filtration or
    direct filtration, after January 1, 2005, the turbidity level of the supplier’s combined filter
    effluent may not exceed 0.3 NTU in at least 95 percent of monthly measurements, and the
    turbidity level of the supplier’s combined filter effluent must not exceed 1 NTU at any time. A
    supplier subject to the LT1ESWTR using technologies other than conventional, direct, slow
    sand, or diatomaceous earth filtration must meet turbidity limits set by the Agency.
    9. The bacteria detected by heterotrophic plate count (HPC) are not necessarily harmful. HPC is
    simply an alternative method of determining disinfectant residual levels. The number of such
    bacteria is an indicator of whether there is enough disinfectant in the distribution system.
    10. SWTR, IESWTR, and LT1ESWTR treatment technique violations that involve turbidity
    exceedences may use the health effects language for turbidity instead.
    11. These arsenic values are effective January 23, 2006. Until then, the MCL is 0.05 mg/ℓ and
    there is no MCLG.
    12. Millions of fibers per liter.
    13. Action Level = 0.015 mg/ℓ.
    14. Action Level = 1.3 mg/ℓ.
    15. Millirems per year.
    16. Picocuries per liter.
    17. This endnote 17 corresponds with the endnote to the table in Appendix
    appendix B to
    Subpart
    subpart Q of 40 CFR 141 (2003) (2006), which stated a past effective date. This
    statement maintains structural consistency with the federal regulations.
    18. A surface water system supplier or a groundwater system supplier under the direct influence
    of surface water is regulated under Subpart B of this Part. A Supbart B community water system
    supplier or a non-transient non-community system supplier that serves 10,000 or more persons
    must comply with Subpart I DBP MCLs and disinfectant maximum residual disinfectant levels
    (MRDLs). All other community and non-transient
    non-community system suppliers must meet
    the MCLs and MRDLs beginning January 1, 2004. A Subpart B transient non-community
    system suppliers serving 10,000 or more persons and using
    supplier that uses chlorine dioxide as
    a disinfectant or oxidant must comply with the chlorine dioxide MRDL. Subpart B transient
    273
    non-community system suppliers serving fewer than 10,000 persons and systems using only
    groundwater not under the direct influence of surface water and using chlorine dioxide as a
    disinfectant or oxidant must comply with the chlorine dioxide MRDL beginning January 1, 2004.
    19. This endnote 19 corresponds with the endnote to the
    table in Appendix B to Subpart Q of 40
    CFR 141 (2003), which expired by its own terms on January 1, 2004. This statement maintains
    structural consistency with the federal regulations.Community and non-transient non-community
    systems must comply with Subpart Y TTHM and HAA5 MCLs of 0.080 mg/ℓ and 0.060 mg/ℓ,
    respectively (with compliance calculated as a locational running annual average) on the schedule
    in Section 611.970.
    20. The MCL for total trihalomethanes is the sum of the concentrations of the individual
    trihalomethanes.
    21. The MCL for haloacetic acids is the sum of the concentrations of the individual haloacetic
    acids.
    22. “MRDLG” means maximum residual disinfectant level goal.
    23. “MRDL” means maximum residual disinfectant level.
    BOARD NOTE: Derived from Appendix
    appendix B to Subpart subpart Q to 40 CFR 141 (2003)
    (2006), as amended at 71 Fed. Reg. 65574 (Nov. 8, 2006)
    .
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Appendix I
    Acronyms Used in Public Notification Regulation
    CCR
    Consumer Confidence Report
    CWS
    Community Water System
    DBP
    Disinfection Byproduct
    GWR
    Groundwater
    Rule
    HPC
    Heterotrophic Plate Count
    IESWTR
    Interim Enhanced Surface Water Treatment Rule
    IOC
    Inorganic Chemical
    LCR
    Lead and Copper Rule
    MCL
    Maximum Contaminant Level
    MCLG
    Maximum Contaminant Level Goal
    MRDL
    Maximum Residual Disinfectant Level
    MRDLG
    Maximum Residual Disinfectant Level Goal
    NCWS
    Non-Community Water System
    NPDWR
    National Primary Drinking Water Regulation
    NTNCWS
    Non-Transient Non-Community Water System
    NTU
    Nephelometric Turbidity Unit
    OGWDW
    USEPA, Office of Ground Water and Drinking Water
    OW
    USEPA, Office of Water
    274
    PN
    Public Notification
    PWS
    Public Water System
    SDWA
    Safe Drinking Water Act
    SMCL
    Secondary Maximum Contaminant Level
    SOC
    Synthetic Organic Chemical
    SWTR
    Surface Water Treatment Rule
    TCR
    Total Coliform Rule
    TT
    Treatment Technique
    TWS
    Transient Non-Community Water System
    USEPA
    United States Environmental Protection Agency
    VOC
    Volatile Organic Chemical
    BOARD NOTE: Derived from Appendix C to Subpart Q to 40 CFR 141, as added at 65 Fed. Reg.
    26048 (May 4, 2000) (2006), as amended at 71 Fed. Reg. 65574 (Nov. 8, 2006).
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Table H
    CT Values (mg.min/ℓ) for Cryptosporidium Inactivation by Chlorine
    Dioxide
    Water Temperature (°C)
    Log Credit
    ≤0.5
    1
    2
    3
    5
    7
    10
    15
    20
    25
    30
    0.25
    159
    153
    140
    128
    107
    90
    69
    45
    29
    19
    12
    0.5
    319
    305
    279
    256
    214
    180
    138
    89
    58
    38
    24
    1.0
    637
    610
    558
    511
    429
    360
    277
    179
    116
    75
    49
    1.5
    956
    915
    838
    767
    643
    539
    415
    268
    174
    113
    73
    2.0
    1275 1220 1117 1023
    858
    719
    553
    357
    232
    150
    98
    2.5
    1594 1525 1396 1278 1072
    899
    691
    447
    289
    188
    122
    3.0
    1912 1830 1675 1534 1286 1079
    830
    536
    347
    226
    147
    A supplier may use the following equation to determine log credit between the indicated values:
    Log credit = (0.001506
    ×
    (1.09116)
    Temp(in °C)
    )
    ×
    CT.
    BOARD NOTE: Derived from the table at 40 CFR 141.720(b)(1) (2006), which corresponds
    with Section 611.1020(b)(1).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Table I
    CT Values (mg.min/ℓ) for Cryptosporidium Inactivation by Ozone
    Water Temperature (°C)
    Log Credit
    ≤0.5
    1
    2
    3
    5
    7
    10
    15
    20
    25
    30
    0.25
    6.0
    5.8
    5.2
    4.8
    4.0
    3.3
    2.5
    1.6
    1.0
    0.6
    0.39
    275
    0.5
    12
    12
    10
    9.5
    7.9
    6.5
    4.9
    3.1
    2.0
    1.2
    0.78
    1.0
    24
    23
    21
    19
    16
    13
    9.9
    6.2
    3.9
    2.5
    1.6
    1.5
    36
    35
    31
    29
    24
    20
    15
    9.3
    5.9
    3.7
    2.4
    2.0
    48
    46
    42
    38
    32
    26
    20
    12
    7.8
    4.9
    3.1
    2.5
    60
    58
    52
    48
    40
    33
    25
    16
    9.8
    6.2
    3.9
    3.0
    72
    69
    63
    57
    47
    39
    30
    19
    12
    7.4
    4.7
    A supplier may use the following equation to determine log credit between the indicated values:
    Log credit = (0.0397
    ×
    (1.09757)
    Temp(in °C)
    )
    ×
    CT.
    BOARD NOTE: Derived from the table at 40 CFR 141.720(b)(2) (2006), which corresponds
    with Section 611.1020(b)(2).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Table J
    UV Dose Table for Cryptosporidium, Giardia lamblia, and Virus
    Inactivation Credit
    UV dose (mJ/cm
    2
    )
    Log credit
    Cryptosporidium
    Giardia lamblia
    Virus
    0.5
    1.6
    1.5
    39
    1.0
    2.5
    2.1
    58
    1.5
    3.9
    3.0
    79
    2.0
    5.8
    5.2
    100
    2.5
    8.5
    7.7
    121
    3.0
    12
    11
    143
    3.5
    15
    15
    163
    4.0
    22
    22
    186
    BOARD NOTE: Derived from the table at 40 CFR 141.720(d)(1) (2006), which corresponds
    with Section 611.1020(d)(1).
    (Source: Added at 31 Ill. Reg. ________, effective ______________________)
    Section 611.Table Z
    Federal Effective Dates
    The following are the effective dates of the various federal NPDWRs:
    Fluoride (40 CFR 141.60(b)(1))
    October 2, 1987
    (corresponding with Section 611.301(b))
    Phase I VOCs (40 CFR 141.60(a)(1))
    July 9, 1989
    (corresponding with Section 611.311(a))
    (benzene, carbon tetrachloride, p-dichlorobenzene, 1,2-dichloroethane, 1,1-dichloro-
    276
    ethylene, 1,1,1-trichloroethane, trichloroethylene, and vinyl chloride)
    Lead and Copper (40 CFR 141
    , Subpart subpart I)
    July 7, 1991
    (corresponding with Subpart G of this Part)
    (lead and copper monitoring, reporting, and recordkeeping requirements of 40 CFR
    141.86 through 141.91)
    Phase II IOCs (40 CFR 141.60(b)(2))
    July 30, 1992
    (corresponding with Section 611.301(b))
    (asbestos, cadmium, chromium, mercury, nitrate, nitrite, and selenium)
    Phase II VOCs (40 CFR 141.60(a)(2))
    July 30, 1992
    (corresponding with Section 611.311(a))
    (o-dichlorobenzene, cis-1,2-dichloroethylene, trans-1,2-dichloroethylene, 1,2-di-
    chloropropane, ethylbenzene, monochlorobenzene, styrene, tetrachloroethylene,
    toluene, and xylenes (total))
    Phase II SOCs (40 CFR 141.60(a)(2))
    July 30, 1992
    (corresponding with Section 611.311(c))
    (alachlor, atrazine, carbofuran, chlordane, dibromochloropropane, ethylene di-
    bromide, heptachlor, heptachlor epoxide, lindane, methoxychlor, polychlorinated bi-
    phenyls, toxaphene, 2,4-D, and 2,4,5-TP (silvex))
    Lead and Copper (40 CFR 141
    , Subpart subpart I)
    December 7, 1992
    (corresponding with Subpart G of this Part)
    (lead and copper corrosion control, water treatment, public education, and lead
    service line replacement requirements of 40 CFR 141.81 through 141.85)
    Phase IIB IOC (40 CFR 141.60(b)(2))
    January 1, 1993
    (corresponding with Section 611.301(b))
    (barium)
    Phase IIB SOCs (40 CFR 141.60(a)(2))
    January 1, 1993
    (corresponding with Section 611.311(c))
    (aldicarb, aldicarb sulfone, aldicarb sulfoxide, and pentachlorophenol. See the
    Board note appended to Section 611.311(c) for information relating to
    implementation of requirements relating to aldicarb, aldicarb sulfone, and
    aldicarb sulfoxide.)
    Phase V IOCs (40 CFR 141.60(b)(3))
    January 17, 1994
    (corresponding with Section 611.301(b))
    (antimony, beryllium, cyanide, nickel, and thallium)
    Phase V VOCs (40 CFR 141.60(a)(3))
    January 17, 1994
    (corresponding with Section 611.311(a))
    (dichloromethane, 1,2,4-trichlorobenzene, and 1,1,2-trichloroethane)
    277
    Phase V SOCs (40 CFR 141.60(a)(3))
    January 17, 1994
    (corresponding with Section 611.311(c))
    (benzo(a)pyrene, dalapon, di(2-ethylhexyl)adipate, di(2-ethylhexyl)phthalate
    dinoseb, diquat, endothall, endrin, glyphosate, hexachlorobenzene, hexachlorocyclo-
    pentadiene, oxamyl, picloram, simazine, and 2,3,7,8-TCDD)
    Consumer Confidence Report Rule (40 CFR 141, Subpart
    subpart Q) September 18, 1998
    (corresponding with Subpart O)
    (notification to public of drinking water quality)
    Interim Enhanced Surface Water Treatment Rule (40 CFR 141, Subpart
    subpart P)
    February 16, 1999
    (corresponding with Subpart R of this Part)
    (applicable to suppliers providing water to fewer than 10,000 persons)
    (Giardia lamblia, viruses, heterotrophic plate count bacteria, Legionella,
    Cryptosporidium, and turbidity)
    Public Notification Rule (40 CFR 141, Subpart
    subpart Q)
    June 5, 2000
    (corresponding with Subpart V of this Part)
    (notification to public of NPDWR violations, variances or exemptions, or other
    situations that could bear on public health)
    Filter Backwash Rule (40 CFR 141.76)
    August 7, 2001
    (corresponding with Section 611.276)
    (reuse of spent filter backwash water, thickener supernatant, or liquids from
    dewatering processes)
    Disinfection/Disinfectant Byproducts Rule (40 CFR 141.64, 141.65 & 141, Subpart
    subpart L)
    Smaller Systems (serving 10,000 or fewer persons)
    December 16, 2001
    Larger Systems (serving more than 10,000 persons)
    December 16, 2003
    (corresponding with Sections
    611.312 & 611.313)
    (total trihalomethanes, haloacetic acids (five), bromate, chlorite, chlorine,
    chloramines, and chlorine dioxide)
    Long Term 1 Enhanced Surface Water Treatment Rule (40 CFR 141, Subpart
    subpart T)
    February 13, 2002
    (corresponding with Subpart X of this Part)
    (applicable to suppliers providing water to 10,000 or more persons)
    (Giardia lamblia, viruses, heterotrophic plate count bacteria, Legionella,
    Cryptosporidium, and turbidity)
    Radionuclides (40 CFR 141.66)
    December 8, 2003
    (corresponding with Section 611.330)
    (combined radium (Ra-226 + Ra-228), gross alpha particle activity, beta particle and
    278
    photon activity, and uranium)
    Arsenic (40 CFR 141.62(b)(16))
    January 23, 2006
    (corresponding with Section 611.301(b))
    (arsenic)
    Stage 2 Disinfection/Disinfectant Byproducts Rule (40 CFR 141, subparts U & V)
    Systems that serve fewer than 10,000 persons)
    Submit plan
    April 1, 2008
    Complete monitoring or study
    March 31, 2010
    Submit IDSE report
    July 1, 2010
    Compliance with monitoring requirements
    If no Cryptosporidium monitoring is required
    October 1, 2013
    If Cryptosporidium monitoring is required
    October 1, 2014
    Systems that serve 10,000 to 49,999 persons)
    Submit plan
    October 1, 2007
    Complete monitoring or study
    September 30, 2009
    Submit IDSE report
    January 1, 2010
    Compliance with monitoring requirements
    October 1, 2013
    Systems that serve 50,000 to 99,999 persons)
    Submit plan
    April 1, 2007
    Complete monitoring or study
    March 31, 2009
    Submit IDSE report
    July 1, 2009
    Compliance with monitoring requirements
    October 1, 2012
    Systems that serve 100,000 or more persons)
    Submit plan
    October 1, 2006
    Complete monitoring or study
    September 30, 2008
    Submit IDSE report
    January 1, 2009
    Compliance with monitoring requirements
    April 1, 2012
    (corresponding with Subparts W & Y of this Part)
    (total trihalomethanes and haloacetic acids (five))
    Long Term 2 Enhanced Surface Water Treatment Rule (40 CFR 141, subpart W)
    Systems that serve fewer than 10,000 persons)
    And which monitor for E. coli
    Begin first round of monitoring
    October 1, 2008
    Begin treatment for Cryptosporidium
    October 1, 2014
    Begin second round of monitoring
    October 1, 2017
    And which monitor for cryptosporidium
    Begin first round of monitoring
    April 1, 2010
    Begin treatment for Cryptosporidium
    October 1, 2014
    Begin second round of monitoring
    April 1, 2019
    Systems that serve 10,000 to 49,999 persons)
    Begin first round of monitoring
    April 1, 2008
    Begin treatment for Cryptosporidium
    October 1, 2013
    Begin second round of monitoring
    October 1, 2016
    279
    Systems that serve 50,000 to 99,999 persons)
    Begin first round of monitoring
    April 1, 2007
    Begin treatment for Cryptosporidium
    October 1, 2012
    Begin second round of monitoring
    October 1, 2015
    Systems that serve 100,000 or more persons)
    Begin first round of monitoring
    October 1, 2006
    Begin treatment for Cryptosporidium
    April 1, 2012
    Begin second round of monitoring
    April 1, 2015
    (corresponding with Subpart Z of this Part)
    (E. coli, Cryptosporidium, Giardia lamblia, viruses, and turbidity)
    Groundwater Rule (40 CFR 141, subpart S)
    December 1, 2009
    (corresponding with Subpart S of this Part)
    (E. coli, enterococci, and coliphage)
    (Source: Amended at 31 Ill. Reg. ________, effective ______________________)
    IT IS SO ORDERED.
    I, John T. Therriault, Assistant Clerk of the Illinois Pollution Control Board, certify that
    the Board adopted the above order on July 26, 2007, by a vote of 4-0.
    ____________________________________
    John T. Therriault, Assistant Clerk
    Illinois Pollution Control Board

    Back to top