ILLINOIS POLLUTION CONTROL BOARD
    June 17, 1998
    IN THE MATTER OF:
    )
    ) R98-23
    WASTEWATER PRETREATMENT
    ) (Identical-in-Substance Rulemaking -
    UPDATE, USEPA REGULATIONS
    ) Water)
    (July 1, 1997 through December 31, 1997)
    )
    Adopted Rule. Final Order
    .
    OPINION AND ORDER OF THE BOARD (by C.A. Manning):
    Pursuant to Sections 7.2 and 13.3 of the Environmental Protection Act (Act) (415 ILCS
    5/7.2 and 13.3 (1996)), the Board adopts amendments to the Illinois wastewater pretreatment
    regulations. As discussed more fully below, the amendments incorporate revisions to the
    procedures for modification of wastewater pretreatment programs incorporated into an
    National Pollution Discharge Elimination System (NPDES) permit of a publicly-owned
    treatment works (POTW). In adopting the federal amendments to which the present
    amendments are “identical-in-substance,” the United States Environmental Protection Agency
    (USEPA) stated that the amendments will reduce the regulatory burden and cost for such
    modifications.
    Section 13.3 of the Environmental Protection Act (Act) (415 ILCS 5/13.3 (1996))
    provides for quick adoption of regulations that are identical in substance to federal wastewater
    pretreatment regulations adopted by USEPA pursuant to Sections 307(b), (c), and (d) and
    402(b)(9) of the Federal Water Pollution Control Act (33 U.S.C. §§ 1317(b), (c), (d),
    1342(b)(9) (1996)). Section 13.3 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 (1996)), do not apply to this
    rulemaking. Because this rulemaking is not subject to Section 5 of the APA, it is not subject
    to first notice or to second notice review by the Joint Committee on Administrative Rules
    (JCAR). The federal wastewater pretreatment regulations are found at 40 CFR 400-499,
    interspersed throughout the federal wastewater effluent discharge rules.
    Section 7.2(b) of the Act (415 ILCS 5/7.2 (1996)) requires the Board to complete its
    identical-in-substance rulemaking actions within one year of the date of the earliest federal
    amendments involved in a docket. In this docket, the sole federal action requiring Board
    action was that of July 17, 1997. That means that the Board must complete its rulemaking
    activity in this docket prior to July 17, 1998.
    On April 16, 1998, the Board adopted a proposal in this rulemaking for publication in
    the
    Illinois Register.
    See 22 Ill. Reg. 7465 (May 1, 1998). Upon publication of the proposal,
    a 45-day public comment period commenced. This public comment period expired on June
    15, 1998. No public comments were received during the public comment period.
    Accordingly, the Board adopts the amendments as proposed.

    2
    FEDERAL ACTION CONSIDERED IN THIS RULEMAKING
    The amendments adopted today include certain federal revisions that occurred in the
    period of July 1, 1997, through December 31, 1997. USEPA amended its wastewater
    pretreatment regulations once during that period. The single set of federal amendments that
    occurred during the period is as follows:
    Federal Action
    Summary
    July 17, 1997
    (62 Fed. Reg. 38406)
    Amendments to the Procedure for Modification of a
    Wastewater Pretreatment Program Incorporated into an
    NPDES Permit. USEPA amended its wastewater
    pretreatment rules and NPDES permit rules to streamline
    the process in order to reduce the administrative burden
    and cost of program modifications.
    DISCUSSION
    USEPA amended its wastewater pretreatment regulations on July 17, 1997. See 62
    Fed. Reg. 38406 (July 17, 1997). The amendments essentially reduce the administrative
    burden and cost associated with modification of a wastewater pretreatment program that is
    incorporated into a POTW’s NPDES permit. USEPA undertook a number of amendments to
    40 CFR 403 to streamline the procedure for program modification.
    Specifically, USEPA reduced the number of categories of modifications that it
    considers “significant,” thus reducing the number that are subject to the public notice
    requirements. USEPA no longer considers the following modifications “significant”: changes
    in the legal authority of the POTW to operate its pretreatment program that make that
    authority more prescriptive; revisions in the legal authority that reflect changes in the federal
    regulations; changes in local pH limits; and reallocations of local limits that do not increase the
    ultimate discharge of that pollutant by the POTW. These changes are reflected in Section
    301.921 of the attached order.
    Further, USEPA eliminated some aspects of the notice requirements. First, USEPA
    amended the type of newspaper required for publication of public notice, so the largest paper
    in the area is no longer required. See Section 310.542
    infra
    at 17. Second, the approval
    authority,
    i.e.,
    the Illinois Environmental Protection Agency (Agency) is not required to
    publish a notice of final program modification where there were no public comments on the
    notice of proposed program modifications. See Section 310.922
    infra
    at 21. Further, as
    specified in Section 310.923, the POTW is now required to notify the Agency of any non-
    substantial modifications at least 45 days prior to its implementation by the POTW. If the
    Agency does not notify the POTW of its decision to approve or deny the modification, or to
    treat the modification as substantial, within 45 days, the POTW may implement the

    3
    modification. Finally, a POTW may change its list of industrial users without prior approval
    by the approval authority simply by changing the list in its annual report.
    The Board has incorporated the federal amendments of July 17, 1997, with only minor
    deviation from the federal text. This would include those alterations in structure and wording
    that the Board finds are necessary to adapt the clear substance of the amended federal
    requirements into the text of the Illinois water pollution control regulations. In addition to the
    deviations from the text of the federal amendments, the Board has used this opportunity to
    make a small number of amendments to the base text of the existing regulations that are
    intended to correct minor, non-substantive faults. These minor revisions to the base text are
    intended to make the text comport more fully with Illinois codification requirements and with
    the most recent trends in codification style employed by JCAR. The Board tabulates below the
    deviations from the federal text and miscellaneous other amendments not directly driven by the
    federal amendments at this point. A brief description of each revision is set forth in the table.
    An asterisk marks Sections that would not be involved in this proceeding but for the indicated
    non-federally derived revision.
    1
    Deviations from the text of the federal amendments are
    indicated by underlining.
    Deviations from the Text of the Federal Amendments and Amendments Not
    Federally-Derived
    Section
    Revision(s)
    * 310.501
    Subpart heading number corrected
    * 310.501(a)
    Prepositional phrase moved for clarity; “which” changed to “that”;
    “receives discharges . . . following conditions” added for clarity
    * 310.501(a)(1) &
    (a)(2)
    “The POTW” and “discharges” added for clarity; “which” changed
    to “that”
    * 310.501(a)(1) &
    (a)(2)
    “The POTW” added and “discharges” moved for clarity; “which”
    changed to “that”; ending period added
    * 310.501(c)
    Cross-reference format updated
    * 310.501 Board Note
    “BOARD NOTE” capitalized; parentheses removed; ending period
    added
    310.503
    “The” capitalized; “BOARD NOTE” capitalized; parentheses
    removed; “permit” rendered in lower case; ending period added
    310.503 Board Note
    “The” capitalized; “BOARD NOTE” capitalized; parentheses
    removed; CFR citation updated; ending period added
    310.510(a)(3)(B)
    “Operation” corrected to “operator”
    310.510(a)(4)(B)
    Cross-reference format updated
    1
    The Board would not include amendments to a Section not otherwise affected by underlying
    federal amendments if the Part were not already opened to make various federally-derived
    amendments. JCAR staff has advised the Board that the inclusion of the proposed corrective
    amendments to Section 310.501 is acceptable.

    4
    310.510(a)(6)(A)
    “POTW’s” corrected to “POTWs” (twice); sentence not appearing in
    federal regulations deleted
    310.510(a)(6)(B)
    Cross-reference format updated; Final sentence deleted and wording
    of new ending sentence revised to agree more closely with the
    existing text of corresponding 40 CFR 403.8(f)(1)(vi)(B)
    310.510(b)(1)
    Cross-reference format updated
    310.510(b)(2)
    Cross-reference format updated
    310.510(b)(3)
    Cross-reference format updated (twice)
    310.510(b)(4)
    Cross-reference format updated
    310.510(b)(6)
    Cross-reference format updated (twice)
    310.510(b)(7)(D)
    Cross-reference format updated
    310.510(f)
    “Must” changed to “shall”
    310.503 Board Note
    CFR citation updated
    310.542
    “Perform the following actions” added for clarity
    310.542(a)
    Changed ending punctuation to a period
    310.542(a)(1)
    “The following actions” added for clarity
    310.542(a)(1)(A)
    “The following entities” added for clarity
    310.542(a)(1)(B)
    “Newspaper(s)” changed to “newspaper or newspapers”; added
    “would provide” for clarity
    310.542(a)(3)
    Changed ending punctuation to a period
    310.542(b)(1)
    Cross-reference format updated
    310.542(b)(3)
    Cross-reference format updated
    310.542 Board Note
    CFR citation updated
    310.612
    “POTW’s” corrected to “POTWs”
    310.612 Board Note
    CFR citation updated
    310.921
    “the following types of modifications” added for clarity
    310.921(b)
    “Maximum allowable industrial loading” and “industrial users”
    rendered in lower case; “for the purposes of this Section” added for
    clarity
    310.921(c)
    “As described” changed to “as the control mechanism is described”
    for clarity
    310.921(g)
    “On the basis that” changed to “on any of the following bases:”,
    divided into subsections, and “the modification” added (twice) for
    clarity; “pretreatment program” and “industrial users” rendered in
    lower case
    310.921 Board Note
    CFR citation updated
    310.922(c)
    “Each of the following conditions is fulfilled” added for clarity;
    paragraph broken into subsections for clarity
    310.922(d)
    comma added for clarity
    310.922 Board Note
    CFR citation updated
    310.923(a)
    “Its” added for clarity
    310.924 Heading
    “Incorporation in permit” changed to “incorporation of modifications
    into the permit” for clarity

    5
    PUBLIC COMMENTS
    The first notice period commenced on May 1, 1998, upon publication of the order in
    the
    Illinois Register.
    See 22 Ill. Reg. 7465 (May 1, 1998). The 45 day public comment
    period closed on June 15, 1998. No public comments were received relating to this
    rulemaking proposal. Accordingly, the Board adopts the amendments as proposed in the
    Board’s April 16, 1998, opinion and order, with some minor, non-substantive, stylistic
    changes that were identified during the course of this rulemaking.
    ORDER
    The Board directs the Clerk of the Board to cause publication of the following adopted
    amendments in the
    Illinois Register:
    TITLE 35: ENVIRONMENTAL PROTECTION
    SUBTITLE C: WATER POLLUTION
    CHAPTER I: POLLUTION CONTROL BOARD
    PART 310
    PRETREATMENT PROGRAMS
    SUBPART A: GENERAL PROVISIONS
    Section
    310.101
    Applicability
    310.102
    Objectives
    310.103
    Federal Law
    310.104
    State Law
    310.105
    Confidentiality
    310.107
    Incorporations by Reference
    310.110
    Definitions
    310.111
    New Source
    SUBPART B: PRETREATMENT STANDARDS
    Section
    310.201
    General Prohibitions
    310.202
    Specific Prohibitions
    310.210
    Specific Limits Developed by POTW
    310.211
    Local Limits
    310.220
    Categorical Standards
    310.221
    Category Determination Request

    6
    310.222
    Deadline for Compliance with Categorical Standards
    310.230
    Concentration and Mass Limits
    310.232
    Dilution
    310.233
    Combined Wastestream Formula
    SUBPART C: REMOVAL CREDITS
    Section
    310.301
    Special Definitions
    310.302
    Authority
    310.303
    Conditions for Authorization to Grant Removal Credits
    310.310
    Calculation of Revised Discharge Limits
    310.311
    Demonstration of Consistent Removal
    310.312
    Provisional Credits
    310.320
    Compensation for Overflow
    310.330
    Exception to POTW Pretreatment Program
    310.340
    Application for Removal Credits Authorization
    310.341
    Agency Review
    310.343
    Assistance of POTW
    310.350
    Continuation of Authorization
    310.351
    Modification or Withdrawal of Removal Credits
    SUBPART D: PRETREATMENT PERMITS
    Section
    310.400
    Preamble
    310.401
    Pretreatment Permits
    310.402
    Time to Apply
    310.403
    Imminent Endangerment
    310.410
    Application
    310.411
    Certification of Capacity
    310.412
    Signatures
    310.413
    Site Visit
    310.414
    Completeness
    310.415
    Time Limits
    310.420
    Standard for Issuance
    310.421
    Final Action
    310.430
    Conditions
    310.431
    Duration of Permits
    310.432
    Schedules of Compliance
    310.441
    Effect of a Permit
    310.442
    Modification
    310.443
    Revocation
    310.444
    Appeal

    7
    SUBPART E: POTW PRETREATMENT PROGRAMS
    Section
    310.501
    Pretreatment Programs Required
    310.502
    Deadline for Program Approval
    310.503
    Incorporation of Approved Programs in Permits
    310.504
    Incorporation of Compliance Schedules in Permits
    310.505
    Reissuance or Modification of Permits
    310.510
    Pretreatment Program Requirements
    310.521
    Program Approval
    310.522
    Contents of Program Submission
    310.524
    Content of Removal Allowance Submission
    310.531
    Agency Action
    310.532
    Defective Submission
    310.533
    Water Quality Management
    310.541
    Deadline for Review
    310.542
    Public Notice and Hearing
    310.543
    Agency Decision
    310.544
    USEPA Objection
    310.545
    Notice of Decision
    310.546
    Public Access to Submission
    310.547
    Appeal
    SUBPART F: REPORTING REQUIREMENTS
    Section
    310.601
    Definition of Control Authority
    310.602
    Baseline Report
    310.603
    Compliance Schedule
    310.604
    Report on Compliance with Deadline
    310.605
    Periodic Reports on Compliance
    310.606
    Notice of Potential Problems
    310.610
    Monitoring and Analysis
    310.611
    Requirements for Non-Categorical Standard Users
    310.612
    Annual POTW Reports
    310.613
    Notification of Changed Discharge
    310.621
    Compliance Schedule for POTW’s
    310.631
    Signatory Requirements for Industrial User Reports
    310.632
    Signatory Requirements for POTW Reports
    310.633
    Fraud and False Statements
    310.634
    Recordkeeping Requirements
    310.635
    Notification of Discharge of Hazardous Waste
    SUBPART G: FUNDAMENTALLY DIFFERENT FACTORS
    Section

    8
    310.701
    Definition of Requester
    310.702
    Purpose and Scope
    310.703
    Criteria
    310.704
    Fundamentally Different Factors
    310.705
    Factors which are Not Fundamentally Different
    310.706
    More Stringent State Law
    310.711
    Application Deadline
    310.712
    Contents of FDF Request
    310.713
    Deficient Requests
    310.714
    Public Notice
    310.721
    Agency Review of FDF Requests
    310.722
    USEPA Review of FDF Requests
    SUBPART H: ADJUSTMENTS FOR POLLUTANTS IN INTAKE
    Section
    310.801
    Net/Gross Calculation by USEPA
    SUBPART I: UPSETS
    Section
    310.901
    Definition
    310.902
    Effect of an Upset
    310.903
    Conditions Necessary for an Upset
    310.904
    Burden of Proof
    310.905
    Reviewability of Claims of Upset
    310.906
    User Responsibility in Case of Upset
    SUBPART J: BYPASS
    Section
    310.910
    Definition
    310.911
    Bypass Not Violating Applicable Pretreatment Standards or Requirements
    310.912
    Notice
    310.913
    Prohibition of Bypass
    SUBPART K: MODIFICATION OF POTW PRETREATMENT PROGRAMS
    Section
    310.920
    General
    310.921
    ProceduresSubstantial Modifications Defined
    310.922
    Approval Procedures for Substantial Modifications
    310.923 Approval Procedures for Non-Substantial Modifications
    310.924 Incorporation of Modifications into the Permit
    AUTHORITY: Implementing and authorized by Sections 13, 13.3, and 27 of the
    Environmental Protection Act [415 ILCS 5/13, 13.3 and 27].

    9
    SOURCE: Adopted in R86-44 at 12 Ill. Reg. 2502, effective January 13, 1988; amended in
    R88-18 at 13 Ill. Reg. 2463, effective January 31, 1989; amended in R89-3 at 13 Ill. Reg.
    19243, effective November 27, 1989; amended in R89-12 at 14 Ill. Reg. 7608, effective May
    8, 1990; amended in R91-5 at 16 Ill. Reg. 7346, effective April 27, 1992; amended in R95-22
    at 20 Ill. Reg. 5533, effective April 1, 1996; amended in R96-12 at 20 Ill. Reg. 10671,
    effective July 24, 1996; amended in R97-7 at 21 Ill. Reg. 5163, effective April 10, 1997;
    amended in R98-23 at 22 Ill. Reg. ________, effective ______________________.
    SUBPART DE: POTW PRETREATMENT PROGRAMS
    Section 310.501
    Pretreatment Programs Required
    a)
    The Agency shall require to establish a pretreatment program any POTW (or
    combination of POTWs operated by the same authority) with a total design flow
    greater than 5 million gallons per day (mgd) which that receives discharges
    which fulfill either of the following conditions to establish a pretreatment
    program:
    1)
    The POTW rReceives discharges from industrial users pollutants which
    that pass through or interfere with the operation of the POTW; or
    2)
    The POTW rReceives discharges from industrial users discharges which
    that are otherwise subject to categorical standards in 35 Ill. Adm. Code
    307.
    b)
    The Agency shall require that a POTW with a design flow of 5 mgd or less
    develop a POTW pretreatment program if the Agency finds that the nature or
    volume of the industrial influent, treatment process upsets, violations of POTW
    effluent limitations, contamination of municipal sludge, or other circumstances
    require a pretreatment program in order to prevent interference or pass through.
    c)
    Subsections (a) and (b) of this Section notwithstanding, the Agency may, in its
    discretion, waive the requirement that any POTW develop a pretreatment
    program.
    1)
    Waivers shall be in writing.
    2)
    The Agency may, in its discretion, rescind any waiver by giving written
    notice to the POTW, giving sufficient time for the POTW to develop the
    program.
    (Board NoteBOARD NOTE: Derived from 40 CFR 403.8(a) (1986)).

    10
    (Source: Amended at 22 Ill. Reg. ________, effective ______________________)
    Section 310.503
    Incorporation of Approved Programs in Permits
    A POTW may develop an appropriate POTW pretreatment program any time before the time
    limit set forth in Section 310.502. tThe approved POTW pretreatment program shall be
    incorporated into the POTW’s NPDES permit. The modification of a POTW’s NPDES
    Permit for the purposes of incorporating a POTW Pretreatment Program approved in
    accordance with the procedure in Sections 310.541 through 310.547 shall be deemed a minor
    permit modification subject to Section 310.442.
    (Board NoteBOARD NOTE: Derived from 40 CFR 403.8(c) (198697), as amended at 62
    Fed. Reg. 38414 (July 17, 1997).
    (Source: Amended at 22 Ill. Reg. ________, effective ______________________)
    Section 310.510
    Pretreatment Program Requirements: Development and Implementation
    by POTW
    A POTW pretreatment program shall be based on the following legal authority and include the
    following procedures, and these authorities and procedures shall at all times by fully and
    effectively exercised and implemented:
    a)
    Legal authority. The POTW shall operate pursuant to legal authority
    enforceable in federal, state or local courts, which authorizes or enables the
    POTW to apply and to enforce the requirements of this Part and 35 Ill. Adm.
    Code 307. Such authority may be contained in a statute, ordinance or series of
    joint powers agreements which the POTW is authorized to enact, enter into or
    implement, and which are authorized by State law. At a minimum, this legal
    authority shall enable the POTW to:
    1)
    Deny or condition new or increased contributions of pollutants, or
    changes in the nature of pollutants, to the POTW by industrial users
    where such contributions do not meet applicable pretreatment standards
    and requirements or where such contributions would cause the POTW to
    violate its NPDES permit;
    2)
    Require compliance with applicable pretreatment standards and
    requirements by industrial users;
    3)
    Control, through ordinance, permit, order or similar means, the
    contribution to the POTW by each industrial user to ensure compliance
    with applicable pretreatment standards and requirements, and in the case
    of each significant industrial users, as defined at 35 Ill. Adm. Code
    310.110, this control shall be achieved through permits or equivalent
    individual control mechanisms issued to each such user; such control

    11
    mechanisms must be enforceable and contain, at a minimum, the
    following conditions:
    A)
    A statement of duration (in no case more than five years);
    B)
    A statement of non-transferability without, at a minimum, prior
    notification to the POTW and provision of a copy of the existing
    control mechanism to the new owner or operationoperator;
    C)
    Effluent limits based on applicable general pretreatment standards
    in this Part and 35 Ill. Adm. Code 307, categorical pretreatment
    standards, local limits, and local law;
    D)
    Self-monitoring, sampling, reporting, notification and
    recordkeeping requirements, including an identification of the
    pollutants to be monitored, sampling location, sampling
    frequency, and sample type, based on the applicable general
    pretreatment standards of this Part and 35 Ill. Adm. Code 307,
    categorical pretreatment standards, local limits, and local law;
    and
    E)
    A statement of applicable civil and criminal penalties for
    violation of pretreatment standards and requirements, and any
    applicable compliance schedule; however, such schedules may
    not extend the compliance date beyond applicable federal
    deadlines;
    4)
    Require:
    A)
    The development of a compliance schedule by each industrial
    user for the installation of technology required to meet applicable
    pretreatment standards and requirements; and
    B)
    The submission of all notices and self-monitoring reports from
    industrial users as are necessary to assess and assure compliance
    by industrial users with pretreatment standards and requirements,
    including, but not limited, to the reports required in 310.Subpart
    F of this Part;
    5)
    Carry out all inspection, surveillance and monitoring procedures
    necessary to determine, independent of information supplied by
    industrial users, compliance or noncompliance with applicable
    pretreatment standards and requirements by industrial users.
    Representatives of the POTW shall be authorized to enter any premises
    of any industrial user in which a discharge source or treatment system is
    located or in which records are required to be kept under Section
    310.634 to assure compliance with pretreatment standards. Such
    authority shall be at least as extensive as the authority provided under
    Section 308 of the CWA;

    12
    6)
    Obtain remedies for noncompliance by any industrial user with any
    pretreatment standard or requirement:
    A)
    All POTW’sPOTWs shall be able to seek injunctive relief for
    noncompliance by industrial users with pretreatment standards or
    requirements. All POTW’sPOTWs shall also have authority to
    seek or assess civil or criminal penalties in at least the amount of
    $1000 a day for each violation by industrial users of pretreatment
    standards and requirements. POTW’s whose approved
    pretreatment programs require modification to conform to the
    requirements of this subsection shall submit a request by
    November 16, 1989.
    B)
    Pretreatment requirements whichthat will be enforced through the
    remedies set forth in subsection(a)(6)(A) of this Section will
    include but not be limited to: the duty to allow or carry out
    inspections, entry or monitoring activities; any rules, regulations
    or orders issued by the POTW; any requirements set forth in
    individual control mechanisms issued by the POTW; or any
    reporting requirements imposed by the POTW, this Part or 35 Ill.
    Adm. Code 307. The POTW shall have authority and procedures
    (after notice to the industrial user) immediately and effectively to
    halt or prevent any discharge of pollutants to the POTW which
    reasonably appears to present an imminent endangerment to the
    health or welfare of persons. The POTW shall also have
    authority and procedures (which shall include notice to the
    affected industrial users and an opportunity to respond) to halt or
    prevent any discharge to the POTW which presents or may
    present an endangerment to the environment or which threatens to
    interfere with the operation of the POTW. The Agency shall
    have authority to seek judicial relief for noncompliance by
    industrial users when the POTW has acted to seek such relief but
    has sought a monetary penalty which that the Agency finds to be
    insufficient. The procedures for notice to industrial users where the
    POTW is seeking ex parte temporary judicial injunctive relief will be
    governed by applicable state or federal law and not by this provision;
    and
    7)
    Comply with the confidentiality requirements set forth in Section
    310.105.;
    b)
    Procedures. The POTW shall develop and implement procedures to ensure
    compliance with the requirements of a pretreatment program. At a minimum,
    these procedures shall enable the POTW to:
    1)
    Identify and locate all possible industrial users which might be subject to
    the POTW pretreatment program. Any compilation, index or inventory

    13
    of industrial users made under this subsection (b)(1) shall be made
    available to the Agency upon request;
    2)
    Identify the character and volume of pollutants contributed to the POTW
    by the industrial users identified under subsection (b)(1) of this Section.
    This information shall be made available to the Agency upon request;
    3)
    Notify industrial users identified under subsection (b)(1) of this Section
    of applicable pretreatment standards and any applicable requirements
    under Section 204(b) and 405 of the CWA and Subtitles C and D of the
    Resource Conservation and Recovery Act, incorporated by reference in
    Section 310.107. Within 30 days of after approval, pursuant to
    subsection (f) of this Section, of a list of significant industrial users,
    notify each significant industrial user or its status as such and of all
    requirements applicable to it as a result of such status;
    4)
    Receive and analyze self-monitoring reports and other notices submitted
    by industrial users in accordance with the self-monitoring requirements
    in Subpart D of this Part;
    5)
    Randomly sample and analyze the effluent from industrial users and
    conduct surveillance and inspection activities in order to identify,
    independent of information supplies by industrial users, occasional and
    continuing noncompliance with pretreatment standards. Inspect and
    sample the effluent from each significant industrial user at least once a
    year. Evaluate, at least once every two years, whether each such
    significant industrial user needs a plan to control slug discharges. For
    purposes of this subsection, a slug discharge is any discharge of a non-
    routine, episodic nature, including but not limited to an accidental spill
    or a non-customary batch discharge. The results of these activities shall
    be made available to the Agency upon request. If the POTW decides
    that a slug control plan is needed, the plan shall contain, at a minimum,
    the following elements:
    A)
    A description of discharge practices, including non-routine batch
    discharges;
    B)
    A description of stored chemicals;
    C)
    Procedures for immediately notifying the POTW of slug
    discharges, including any discharge that would violate a
    prohibition under Section 310.202 and 35 Ill. Adm. Code
    307.Subpart B, with procedures for follow-up written notification
    within five days; and
    D)
    If necessary, procedures to prevent adverse impact from
    accidental spills, including inspection and maintenance of storage
    areas, handling and transfer of materials, loading and unloading
    operations, control of plant site run-off, worker training, building

    14
    of containment structures or equipment, measures for containing
    toxic organic pollutants (including solvents) and measures and
    equipment for emergency response;
    6)
    Investigate instances of noncompliance with pretreatment standards and
    requirements, as indicated in the reports and notices required under
    Subpart D of this Part or as indicated by analysis, inspection and
    surveillance activities described in subsection (b)(5) of this Section.
    Sample taking and analysis, and the collection of other information, shall
    be performed with sufficient care to produce evidence admissible in
    enforcement proceedings or in judicial actions; and
    7)
    Comply with the public participation requirements of 40 CFR 25,
    incorporated by reference in Section 310.107, in the enforcement of
    pretreatment standards. These procedures shall include provision for
    providing, at least annually, public notification, in a newspaper of
    general circulation in the unit of local government in which the POTW is
    located, of industrial users which, during the previous 12 months, were
    in significant noncompliance with applicable pretreatment requirements.
    For the purposes of this provision, an industrial user is in significant
    noncompliance if its violation meets one or more of the following
    criteria:
    A)
    Chronic violations of wastewater discharge limits, defined here as
    those in which sixty-six66 percent or more of all of the
    measurements taken during a six-month period exceed (by any
    magnitude) the daily maximum limit or the average limit for the
    same pollutant parameter;
    B)
    “Technical review criteria” (TRC) violations, which shall mean
    those violations in which thirty-three33 percent or more of all of
    the measurements for each pollutant parameter taken during a six-
    month period equal or exceed the product of the daily maximum
    limit or the average limit multiplied by the applicable TRC (TRC
    = 1.4 for BOD, TSS, fats, oil, and grease, and 1.2 for all other
    pollutants except pH);
    C)
    Any other violation of a pretreatment effluent limit (daily
    maximum or longer-term average) that the Control Authority
    determines has caused, alone or in combination with other
    discharges, interference or pass through (including endangering
    the health of POTW personnel or the general public);
    D)
    Any discharge of a pollutant that has caused imminent
    endangerment to human health, welfare or to the environment or
    has resulted in the POTW’s exercise of its emergency authority
    under subsection (a)(6)(B) of this Section to halt or prevent such
    a discharge;

    15
    E)
    Failure to meet, within 90 days after the schedule date, a
    compliance schedule milestone contained in a local control
    mechanism or enforcement order for starting construction,
    completing construction, or attaining final compliance;
    F)
    Failure to provide, within 30 days after the due date, required
    reports, such as baseline monitoring reports, 90-day compliance
    reports, periodic self-monitoring reports, and reports on
    compliance with compliance schedules;
    G)
    Failure to accurately report noncompliance; or
    H)
    Any other violation or group of violations which the Agency
    determines will adversely affect the operation or implementation
    of the local pretreatment program.;
    c)
    The POTW shall have sufficient resources and qualified personnel to carry the
    authorities and procedures described in subsections (a) and (b).;
    d)
    Local limits. The POTW shall develop local limits as required in Section
    310.210 or demonstrate that they are not necessary.;
    e)
    The POTW shall develop and implement an enforcement response plan. This
    plan shall contain detailed procedures indicating how a POTW will investigate
    and respond to instances of industrial user noncompliance. The plan shall, at a
    minimum:
    1)
    Describe how the POTW will investigate instances of noncompliance;
    2)
    Describe the types of escalating enforcement responses the POTW will
    take in response to all anticipated types of industrial user violations and
    the time periods within which responses will take place;
    3)
    Identify (by title) the officials responsible for each type of response; and
    4)
    Adequately reflect the POTW’s primary responsibility to enforce all
    applicable pretreatment requirements and standards, as detailed in
    subsections (a) and (b).; and
    f)
    The POTW shall prepare and maintain a list of its industrial users meeting the
    criteria in the first paragraphsubsection of the definition of “significant
    industrial user” at Section 310.110. The list shall identify the criteria in the
    first paragraphsubsection of the definition of “significant industrial user” at
    Section 310.110 applicable to each industrial user and, for industrial users
    meeting the criteria in the second paragraphsubsection of that definition, shall
    also indicate whether the POTW has made a determination pursuant to the
    caveat in the second paragraphsubsection of that definition that such industrial
    user should not be considered a significant industrial user. This The initial list,
    and any subsequent modifications thereto, shall be submitted to the Agency

    16
    pursuant to Sections 310.521 through 310.533 as a non-substantial program
    modification pursuant to Subpart KSection 310.923. Discretionary designations
    or de-designations by the control authority shall be deemed to be approved by
    the Agency 90days after submission of the list or modifications thereto.
    Modifications to the list shall be submitted to the Agency pursuant to Section
    310.612(a).
    BOARD NOTE: Derived from 40 CFR 403.8(f) (19947), as amended at 60
    Fed. Reg. 33926 effective June 29, 1995 62 Fed. Reg. 38414 (July 17, 1997).
    (Source: Amended at 22 Ill. Reg. ________, effective ______________________)
    Section 310.542
    Public Notice and Hearing
    Upon receipt of a submission the Agency shall commence its review. Within 20 work days
    after making a determination that a submission meets the requirements of Section 310.522,
    and, where removal allowance approval is sought, Sections 310.340 and 310.524, the Agency
    shall perform the following actions:
    a)
    Issue a public notice of request for approval of the submission;.
    1)
    This public notice shall be circulated in a manner designed to inform
    interested and potentially interested persons of the submission.
    Procedures for the circulation of public notice shall include the following
    actions:
    A)
    Mailing notices of the request for approval of the submission to
    the following entities:
    i)
    Federal agencies as designated by USEPA;
    ii)
    Regional planning agencies whichthat participate in
    development of water quality management plans (unless
    such agencies have specifically requested not to receive
    such notices); and
    iii)
    Any other person or group who has requested individual
    notice, including those on appropriate mailing lists; and
    B)
    Publication of a notice of request for approval of the submission
    in the largest daily a newspaper or newspapers of general
    circulation within the jurisdiction or jurisdictions served by the
    POTW that would provide meaningful public notice.

    17
    2)
    The public notice shall provide a period of not less than 30 days
    following the date of the public notice during which time interested
    persons may submit their written views on the submission.
    3)
    All written comments submitted during the 30 day comment period shall
    be retained by the Agency and considered in the decision on whether or
    not to approve the submission. The period for comment may be
    extended at the discretion of the Agency; and.
    b)
    Provide an opportunity for the applicant, any affected state, any interested State
    or federal agency, person or group of persons to request a public hearing with
    respect to the submission.
    1)
    This request for public hearing shall be filed within the 30 day (or
    extended) comment period described in subsection (a)(2) of this Section
    and shall indicate the interest of the person filing such request and the
    reasons why a hearing is warranted.
    2)
    The Agency shall hold a hearing if the POTW so requests. In addition,
    a hearing will be held if there is a significant public interest in issues
    relating to whether or not the submission should be approved. Instances
    of doubt should be resolved in favor of holding the hearing.
    3)
    Public notice of a hearing to consider a submission and sufficient to
    inform interested parties of the nature of the hearing and the right to
    participate shall be published in the same newspaper as the notice of the
    original request for approval of the submission under subsection
    (a)(1)(B) of this Section. In addition, notice of the hearing shall be sent
    to those persons requesting individual notice.
    BOARD NOTE: Derived from 40 CFR 403.11(b) (198897), as amended
    at 53 Fed. Reg. 40613, October 17, 198862 Fed. Reg. 38414 (July 17,
    1997).
    (Source: Amended at 22 Ill. Reg. ________, effective ______________________)
    SUBPART F: REPORTING REQUIREMENTS
    Section 310.612
    Annual POTW Reports
    POTW’sPOTWs with approved pretreatment programs shall provide the approval authority
    with a report that briefly describes the POTW’s program activities, including activities of all

    18
    participating agencies, if more than one jurisdiction is involved in the local program. The
    report required by this Section must be submitted no later than one year after approval of the
    POTW’s pretreatment program and at least annually thereafter. The report must include, at a
    minimum, the following:
    a)
    An updated list of the POTW’s industrial users, including their names and
    addresses or a list of deletions and additions keyed to a previously submitted
    list. The POTW shall provide a brief explanation of each deletion. This list
    must identify which industrial users are subject to categorical pretreatment
    standards and specify which standards are applicable to each industrial user.
    The list must indicate which industrial users are subject to more stringent than
    the categorical pretreatment standards. The POTW shall also list the industrial
    users that are subject only to local requirements.
    b)
    A summary of the status of industrial user compliance over the reporting period.
    c)
    A summary of compliance and enforcement activities (including inspections)
    conducted by the POTW during the reporting period. And,
    d)
    Any other relevant information requested by the Agency.A summary of changes
    to the POTW’s pretreatment program that have not been previously reported to
    the Agency.
    BOARD NOTE: Derived from 40 CFR 403.12(i) (1997), as added amended at
    53 Fed. Reg. 40614, October 17, 198862 Fed. Reg. 38414 (July 17, 1997).
    (Source: Amended at 22 Ill. Reg. ________, effective ______________________)
    SUBPART K: MODIFICATION OF POTW PRETREATMENT PROGRAMS
    Section 310.921
    ProceduresSubstantial Modifications Defined
    Substantial modifications include the following types of modifications:
    a) Modifications that relax POTW legal authorities (as described in Section
    310.510(a)), except for modifications that directly reflect a revision to this Part
    or to 35 Ill. Adm. Code: Subtitle C, and are reported pursuant to Section
    310.923;
    b) Modifications that relax local limits, except for the modifications to local limits
    for pH and reallocations of the maximum allowable industrial loading of a
    pollutant that do not increase the total industrial loadings for the pollutant,

    19
    which are reported pursuant to Section 310.923. For the purposes of this
    Section, “maximum allowable industrial loading” means the total mass of a
    pollutant that all industrial users of a POTW (or a subgroup of industrial users
    identified by the POTW) may discharge pursuant to limits developed under
    Section 310.210;
    c) Changes to the POTW's control mechanism, as the control mechanism is
    described in Section 310.510(a)(3);
    d) A decrease in the frequency of self-monitoring or reporting required of
    industrial users;
    e) A decrease in the frequency of industrial user inspections or sampling by the
    POTW;
    f) Changes to the POTW's confidentiality procedures; and
    g) Other modifications designated as substantial modifications by the Agency on
    any of the following bases:
    1) The modification could have a significant impact on the operation of the
    POTW's pretreatment program;
    2) The modification could result in an increase in pollutant loadings at the
    POTW; or
    3) The modification could result in less stringent requirements being
    imposed on industrial users of the POTW.
    POTW pretreatment program modifications must be accomplished as follows for substantial
    modifications, as defined in Section 910.922.
    a) The POTW shall submit to the Agency a statement of the basis for the desired
    modification, a modified program description (See Section 310.510) or such
    other documents the Agency determines to be necessary under the
    circumstances.
    b) The Agency shall approve or disapprove the modification based on the
    requirements of Section 310.510, following the procedures in Section 310.542.
    c) The modification must be incorporated into the POTW’s NPDES permit after
    approval pursuant to 35 Ill. Adm. Code 309.Subpart A.

    20
    d) The modification becomes effective upon approval by the Agency. Notice of
    approval must be published in the same newspaper of the original request for
    approval of the modification under Section 310.542(a)(1)(B).
    BOARD NOTE: Derived from 40 CFR 403.18(b) (1997), as added amended at
    53 Fed. Reg. 40615, October 17, 198862 Fed. Reg. 38414 (July 17, 1997).
    (Source: Repealed and new Section added at 22 Ill. Reg. ________, effective
    ______________________)
    Section 310.922
    Approval Procedures for Substantial Modifications
    a) The POTW shall submit to the Agency a statement of the basis for the desired
    program modification, a modified program description (see Section 310.522),
    or such other documents the Agency determines to be necessary under the
    circumstances.
    b) The Agency shall approve or disapprove the modification based on the
    requirements of Section 310.510 and using the procedures in Sections 310.542
    through 310.546, except as provided in subsections (c) and (d) of this Section.
    The modification shall become effective upon approval by the Agency.
    c) The Agency need not publish a notice of decision under Section 310.545
    provided each of the following conditions is fulfilled:
    1) The notice of request for approval under Section 310.542(a) states that
    the request will be approved if no comments are received by a date
    specified in the notice;
    2) No substantive comments are received; and
    3) The request is approved without change.
    d) Notices required by Sections 310.542 through 310.546 may be performed by
    the POTW, provided that the Agency finds that the POTW notice otherwise
    satisfies the requirements of Sections 310.542 through 310.546.
    a) The following are substantial modifications for purposes of this Section:
    1) Changes to the POTW’s legal authorities;
    2) Changes to local limits, which result in less stringent local limits;

    21
    3) Changes to the POTW’s control mechanism, as described in Section
    310.510(a)(3);
    4) Changes to the POTW’s method for implementing categorical
    pretreatment standards (e.g. incorporation by reference, separate
    promulgation, etc.);
    5) A decrease in the frequency of self-monitoring or reporting required of
    industrial users;
    6) A decrease in the frequency of industrial user inspections or sampling by
    the POTW;
    7) Changes to the POTW’s confidentiality procedures;
    8) Significant reductions in the POTW’s pretreatment program resources
    (including personnel commitments, equipment and funding levels); and
    9) Changes in the POTW’s sludge disposal and management practices.
    b) The Agency may designate other specific modifications, in addition to those
    listed in subsection (a) as substantial modifications.
    c) A modification that is not included in subsection (a) is a substantial modification
    for the purposes of sections 310.920 through 310.922 if the modification:
    1) Would have a significant impact on the operation of the POTW’s
    pretreatment program;
    2) Would result in an increase in pollution loadings at the POTW; or
    3) Would result in less stringent requirements being imposed on industrial
    users of the POTW.
    BOARD NOTE: Derived from 40 CFR 403.18(c) (1997), as added
    amended at 53 Fed. Reg. 40615, October 17, 198862 Fed. Reg. 38414
    (July 17, 1997).
    (Source: Repealed and new Section added at 22 Ill. Reg. ________, effective
    ______________________)

    22
    Section 310.923 Approval Procedures for Non-Substantial Modifications
    a) The POTW shall notify the Agency of any non-substantial modification at least
    45 days prior to its implementation by the POTW, in a statement similar to that
    provided for in Section 310.922(a).
    b) Within 45 days after the submission of the POTW's statement, the Agency shall
    notify the POTW of its decision to approve or disapprove the non-substantial
    modification.
    c) If the Agency does not notify the POTW within 45 days of its decision to
    approve or deny the modification, or to treat the modification as substantial
    under Section 310.921(g), the POTW may implement the modification.
    BOARD NOTE: Derived from 40 CFR 403.18(d) (1997), as added at 62 Fed.
    Reg. 38414 (July 17, 1997).
    (Source: Added at 22 Ill. Reg. ________, effective ______________________)
    Section 310.924 Incorporation of Modifications into the Permit
    All modifications shall be incorporated into the POTW's NPDES permit upon approval. The
    permit shall be modified to incorporate the approved modification in accordance with this Part
    and 35 Ill. Adm. Code 310.
    BOARD NOTE: Derived from 40 CFR 403.18(e) (1997), as added at 62 Fed. Reg. 38414
    (July 17, 1997).
    (Source: Added at 22 Ill. Reg. ________, effective ______________________)
    IT IS SO ORDERED.
    Board Member K.M. Hennessey abstained.
    I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, certify that the
    above opinion and order was adopted on the 17th day of June 1998 by a vote of 5-0.
    Dorothy M. Gunn, Clerk
    Illinois Pollution Control Board

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