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TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 620
GROUNDWATER QUALITY
SUBPART A: GENERAL
Section
620.105 Purpose
620.110 Definitions
620.115 Prohibition
620.125 Incorporations by Reference
620.130 Exemption from General Use Standards and Public and Food Processing Water
Supply Standards
620.135 Exclusion for Underground Water in Certain Man-Made Conduits
SUBPART B: GROUNDWATER CLASSIFICATION
Section
620.201 Groundwater Designations
620.210 Class I: Potable Resource Groundwater
620.220 Class II: General Resource Groundwater
620.230 Class III: Special Resource Groundwater
620.240 Class IV: Other Groundwater
620.250 Groundwater Management Zone
620.260 Reclassification of Groundwater by Adjusted Standard
SUBPART C: NONDEGRADATION PROVISIONS FOR
APPROPRIATE GROUNDWATERS
Section
620.301 General Prohibition Against Use Impairment of Resource Groundwater
620.302 Applicability of Preventive Notification and Preventive Response Activities
620.305 Preventive Notification Procedures
620.310 Preventive Response Activities
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SUBPART D: GROUNDWATER QUALITY STANDARDS
Section
620.401 Applicability
620.405 General Prohibitions Against Violations of Groundwater Quality Standards
620.410 Groundwater Quality Standards for Class I: Potable Resource Groundwater
620.420 Groundwater Quality Standards for Class II: General Resource Groundwater
620.430 Groundwater Quality Standards for Class III: Special Resource Groundwater
620.440 Groundwater Quality Standards for Class IV: Other Groundwater
620.450 Alternative Groundwater Quality Standards
SUBPART E: GROUNDWATER MONITORING AND ANALYTICAL PROCEDURES
Section
620.505 Compliance Determination
620.510 Monitoring and Analytical Requirements
SUBPART F: HEALTH ADVISORIES
Section
620.601 Purpose of a Health Advisory
620.605 Issuance of a Health Advisory
620.610 Publishing Health Advisories
620.615 Additional Health Advice for Mixtures of Similar-Acting Substances
620.Appendix A Procedures for Determining Human Threshold Toxicant Advisory
Concentration for Class I: Potable Resource Groundwater
620.Appendix B Procedures for Determining Hazard Indices for Class I: Potable Resource
Groundwater for Mixtures of Similar-Acting Substances
620.Appendix C Guidelines for Determining When Dose Addition of Similar-Acting
Substances in Class I: Potable Resource Groundwaters is Appropriate
620.Appendix D Confirmation of an Adequate Corrective Action Pursuant to 35 Ill. Adm.
Code 620.250 (a)(2).
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AUTHORITY: Implementing Section 8 of the Illinois Groundwater Protection Act [415 ILCS
55/8] and authorized by Section 27 of the Environmental Protection Act [415 ILCS 5/27].
SOURCE: Adopted in R89-14(B) at 15 Ill. Reg. 17614, effective November 25, 1991; amended
in R89-14(C) at 16 Ill. Reg. 14667, effective September 11, 1992; amended at 18 Ill. Reg.
14084, effective August 24, 1994; amended in R96-18 at 21 Ill. Reg. 6518, effective May 8,
1997; amended in R97-11 at 21 Ill. Reg. 7869, effective July 1, 1997; amended in _____ at
_____ Ill. Reg. ______, effective __________________.
SUBPART A: GENERAL
Section 620.110 Definitions
The definitions of the Environmental Protection Act [415 ILCS 5] and the Groundwater
Protection Act [415 ILCS 55] apply to this Part. The following definitions also apply to this Part.
"Act" means the Environmental Protection [415 ILCS 5].
"Agency" means the Illinois Environmental Protection Agency.
"AQUIFER" MEANS SATURATED (WITH GROUNDWATER) SOILS
AND GEOLOGIC MATERIALS WHICH ARE SUFFICIENTLY
PERMEABLE TO READILY YIELD ECONOMICALLY USEFUL
QUANTITIES OF WATER TO WELLS, SPRINGS, OR STREAMS
UNDER ORDINARY HYDRAULIC GRADIENTS.
(Section 3(b) of the
IGPA)
"BETX" means the sum of the concentrations of benzene, ethylbenzene,
toluene, and xylenes.
"Board" means the Illinois Pollution Control Board.
"Carcinogen" means a chemical, or complex mixture of closely related
chemicals, which has been listed or classified in the Integrated Risk
Information System or as specified in a final rule adopted by USEPA in
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accordance with USEPA Guidelines for Carcinogenic Risk Assessment,
incorporated by reference at Section 620.125, to be a group A, B1, or B2
carcinogen.
"COMMUNITY WATER SUPPLY" MEANS A PUBLIC SUPPLY
WHICH SERVES OR IS INTENDED TO SERVE AT LEAST 15
SERVICE CONNECTIONS USED BY RESIDENTS OR REGULARLY
SERVES AT LEAST 25 RESIDENTS. (Section 3.05 of the Act)
"CONTAMINANT" MEANS ANY SOLID, LIQUID, OR GASEOUS
MATTER, ANY ODOR, OR ANY FORM OF ENERGY, FROM
WHATEVER SOURCE. (Section 3.06 of the Act)
"Corrective action process" means those procedures and practices that may
be imposed by a regulatory agency when a determination has been made
that contamination of groundwater has taken place, and are necessary to
address a potential or existing violation of the standards set forth in
Subpart D.
"Cumulative impact area" means the area, including the coal mine area
permitted under the Surface Coal Mining Land Conservation Act [225
ILCS 720] and 62 Ill. Adm. Code 1700 through 1850, within which
impacts resulting from the proposed operation may interact with the
impacts of all anticipated mining on surface water and groundwater
systems.
"Detection" means the identification of a contaminant in a sample at a
value equal to or greater than the:
"Method Detection Limit" or "MDL" which means the minimum
concentration of a substance that can be measured as reported with
99 percent confidence that the true value is greater than zero,
pursuant to 56 Fed. Reg. 3526-3597, incorporated by reference at
Section 620.125; or
"Method Quantitation Limit" or "MQL" which means the minimum
concentration of a substance that can be measured and reported
pursuant to "Test Methods for Evaluating Solid Wastes, Physical/
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Chemical Methods", incorporated by reference at Section 620.125.
"Department" means the Illinois Department of Energy and Natural
Resources.
"GROUNDWATER" MEANS UNDERGROUND WATER WHICH
OCCURS WITHIN THE SATURATED ZONE AND GEOLOGIC
MATERIALS WHERE THE FLUID PRESSURE IN THE PORE SPACE
IS EQUAL TO OR GREATER THAN ATMOSPHERIC PRESSURE.
(Section 3.64 of the Act)
"Hydrologic balance" means the relationship between the quality and
quantity of water inflow to, water outflow from, and water storage in a
hydrologic unit such as a drainage basin, aquifer, soil zone, lake, or
reservoir. It encompasses the dynamic relationships among precipitation,
runoff, evaporation, and changes in ground and surface water storage.
"IGPA" means the Illinois Groundwater Protection Act. [415 ILCS 5].
"Licensed Professional Engineer" means a person, corporation or
partnership licensed under the laws of the State of Illinois to practice
professional engineering. [225 ILCS 325].
“Licensed Professional Geologist” means an individual who is licensed
under [the laws of the State of Illinois] to engage in the practice of
professional geology in Illinois personal registered under the Illinois
Professional Geologists Act., [225 ILCS 745].
"LOAEL" or "Lowest observable adverse effect level" means the lowest
tested concentration of a chemical or substance which produces a
statistically significant increase in frequency or severity of non-overt
adverse effects between the exposed population and its appropriate control.
LOAEL may be determined for a human population (LOAEL-H) or an
animal population. (LOAEL-A)
"NOAEL" or "No observable adverse effect level" means the highest tested
concentration of a chemical or substance which does not produce a
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statistically significant increase in frequency or severity of non- overt
adverse effects between the exposed population and its appropriate control.
NOAEL may be determined for a human population (NOAEL-H) or an
animal population (NOAEL-A)
"NON-COMMUNITY WATER SUPPLY" MEANS A PUBLIC WATER
SUPPLY THAT IS NOT A COMMUNITY WATER SUPPLY
.
(Section
3.05)
"Off-site" means not on-site.
"On-site" means on the same or geographically contiguous property which
may be divided by public or private right-of-way, provided the entrance
and exit between properties is at a crossroads intersection and access is by
crossing as opposed to going along the right-of-way. Noncontiguous
properties owned by the same person but connected by a right-of-way
which he controls and to which the public does not have access is also
considered on-site property.
"Operator" means the person responsible for the operation of a site, facility
or unit. "Owner" means the person who owns a site, facility or unit or part
of a site, facility or unit, or who owns the land on which the site, facility or
unit is located.
"POTABLE" MEANS GENERALLY FIT FOR HUMAN
CONSUMPTION IN ACCORDANCE WITH ACCEPTED WATER
SUPPLY PRINCIPLES AND PRACTICES
.
(Section 3.65 of the Act)
"POTENTIAL PRIMARY SOURCE" MEANS ANY UNIT AT A
FACILITY OR SITE NOT CURRENTLY SUBJECT TO A REMOVAL
OR REMEDIAL ACTION WHICH
:
IS UTILIZED FOR THE TREATMENT, STORAGE, OR
DISPOSAL OF ANY HAZARDOUS OR SPECIAL WASTE NOT
GENERATED AT THE SITE; OR
IS UTILIZED FOR THE DISPOSAL OF MUNICIPAL WASTE
NOT GENERATED AT THE SITE, OTHER THAN
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LANDSCAPE WASTE AND CONSTRUCTION AND
DEMOLITION DEBRIS; OR
IS UTILIZED FOR THE LANDFILLING, LAND TREATING,
SURFACE IMPOUNDING OR PILING OF ANY HAZARDOUS
OR SPECIAL WASTE THAT IS GENERATED ON THE SITE
OR AT OTHER SITES OWNED, CONTROLLED OR
OPERATED BY THE SAME PERSON; OR
STORES OR ACCUMULATES AT ANY TIME MORE THAN
75,000 POUNDS ABOVE GROUND, OR MORE THAN 7,500
POUNDS BELOW GROUND, OF ANY HAZARDOUS
SUBSTANCES. (Section 3.59 of the Act)
"POTENTIAL ROUTE" MEANS ABANDONED AND IMPROPERLY
PLUGGED WELLS OF ALL KINDS, DRAINAGE WELLS, ALL
INJECTION WELLS, INCLUDING CLOSED LOOP HEAT PUMP
WELLS, AND ANY EXCAVATION FOR THE DISCOVERY,
DEVELOPMENT OR PRODUCTION OF STONE, SAND OR GRAVEL
.
(Section 3.58 of the Act)
"POTENTIAL SECONDARY SOURCE" MEANS ANY UNIT AT A
FACILITY OR A SITE NOT CURRENTLY SUBJECT TO A
REMOVAL OR REMEDIAL ACTION, OTHER THAN A POTENTIAL
PRIMARY SOURCE, WHICH:
IS UTILIZED FOR THE LANDFILLING, LAND TREATING,
OR SURFACE IMPOUNDING OF WASTE THAT IS
GENERATED ON THE SITE OR AT OTHER SITES OWNED,
CONTROLLED OR OPERATED BY THE SAME PERSON,
OTHER THAN LIVESTOCK AND LANDSCAPE WASTE, AND
CONSTRUCTION AND DEMOLITION DEBRIS; OR
STORES OR ACCUMULATES AT ANY TIME MORE THAN
25,000 BUT NOT MORE THAN 75,000 POUNDS ABOVE
GROUND, OR MORE THAN 2,500 BUT NOT MORE THAN
7,500 POUNDS BELOW GROUND, OF ANY HAZARDOUS
SUBSTANCE; OR
STORES OR ACCUMULATES AT ANY TIME MORE THAN
25,000 GALLONS ABOVE GROUND, OR MORE THAN 500
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GALLONS BELOW GROUND, OF PETROLEUM, INCLUDING
CRUDE OIL OR ANY FRACTION THEREOF WHICH IS NOT
OTHERWISE SPECIFICALLY LISTED OR DESIGNATED AS
A HAZARDOUS SUBSTANCE; OR
STORES OR ACCUMULATES PESTICIDES, FERTILIZERS,
OR ROAD OILS FOR PURPOSES OF COMMERCIAL
APPLICATION OR FOR DISTRIBUTION TO RETAIL SALES
OUTLETS; OR
STORES OR ACCUMULATES AT ANY TIME MORE THAN
50,000 POUNDS OF ANY DE-ICING AGENT; OR
IS UTILIZED FOR HANDLING LIVESTOCK WASTE OR FOR
TREATING DOMESTIC WASTEWATERS OTHER THAN
PRIVATE SEWAGE DISPOSAL SYSTEMS AS DEFINED IN
THE PRIVATE SEWAGE DISPOSAL LICENSING ACT
,
[225
ILCS 225].
"Practical Quantitation Limit" or "PQL" means the lowest concentration or
level that can be reliably measured within specified limits of precision and
accuracy during routine laboratory operating conditions in accordance with
"Test Methods for Evaluating Solid Wastes, Physical/Chemical Methods",
EPA Publication No. SW-846, incorporated by reference at Section
620.125.
"Previously mined area" means land disturbed or affected by coal mining
operations prior to February 1, 1983.
(Board Note: February 1, 1983, is the effective date of the Illinois
permanent program regulations implementing the Surface Coal Mining
Land Conservation and Reclamation Act [225 ILCS 225] as codified in 62
Ill. Adm. Code 1700 through 1850.)
"Property class" means the class assigned by a tax assessor to real property
for purposes of real estate taxes.
(Board Note: The property class [rural property, residential vacant land,
residential with dwelling, commercial residence, commercial business,
commercial office, or industrial] is identified on the property record card
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maintained by the tax assessor in accordance with the Illinois Real
Property Appraisal Manual [February 1987], published by the Illinois
Department of Revenue, Property Tax Administration Bureau.)
"PUBLIC WATER SUPPLY" MEANS ALL MAINS, PIPES AND
STRUCTURES THROUGH WHICH WATER IS OBTAINED AND
DISTRIBUTED TO THE PUBLIC, INCLUDING WELLS AND WELL
STRUCTURES, INTAKES AND CRIBS, PUMPING STATIONS,
TREATMENT PLANTS, RESERVOIRS, STORAGE TANKS AND
APPURTENANCES, COLLECTIVELY OR SEVERALLY, ACTUALLY
USED OR INTENDED FOR USE FOR THE PURPOSE OF
FURNISHING WATER FOR DRINKING OR GENERAL DOMESTIC
USE AND WHICH SERVE AT LEAST 15 SERVICE CONNECTIONS
OR WHICH REGULARLY SERVE AT LEAST 25 PERSONS AT
LEAST 60 DAYS PER YEAR. A PUBLIC WATER SUPPLY IS
EITHER A "COMMUNITY WATER SUPPLY" OR A "NON-
COMMUNITY WATER SUPPLY".
(Section 3.28 of the Act)
"Regulated entity" means a facility or unit regulated for groundwater
protection by any state or federal agency.
"Regulatory agency" means the Illinois Environmental Protection Agency,
Department of Public Health, Department of Agriculture, Department of
Mines and Minerals, and the Office of State Fire Marshal.
"REGULATED RECHARGE AREA" MEANS A COMPACT
GEOGRAPHIC AREA, AS DETERMINED BY THE BOARD pursuant
to Section 17.4 of the Act, THE GEOLOGY OF WHICH RENDERS A
POTABLE RESOURCE GROUNDWATER PARTICULARLY
SUSCEPTIBLE TO CONTAMINATION. (Section 3.67 of the Act)
"RESOURCE GROUNDWATER" MEANS GROUNDWATER THAT IS
PRESENTLY BEING, OR IN THE FUTURE IS CAPABLE OF BEING,
PUT TO BENEFICIAL USE BY REASON OF BEING OF SUITABLE
QUALITY. (Section 3.66 of the Act)
"SETBACK ZONE" MEANS A GEOGRAPHIC AREA, DESIGNATED
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PURSUANT TO THIS ACT, CONTAINING A POTABLE WATER
SUPPLY WELL OR A POTENTIAL SOURCE OR POTENTIAL
ROUTE HAVING A CONTINUOUS BOUNDARY, AND WITHIN
WHICH CERTAIN PROHIBITIONS OR REGULATIONS ARE
APPLICABLE IN ORDER TO PROTECT GROUNDWATERS.
(Section
3.61 of the Act)
"SITE" MEANS ANY LOCATION, PLACE, TRACT OF LAND AND
FACILITIES, INCLUDING BUT NOT LIMITED TO, BUILDINGS AND
IMPROVEMENTS USED FOR THE PURPOSES SUBJECT TO
REGULATION OR CONTROL BY THE ACT OR REGULATIONS
THEREUNDER.
(Section 3.43 of the Act)
"Spring" means a natural surface discharge of an aquifer from rock or soil.
"Threshold dose" means the lowest dose of a chemical at which a specified
measurable effect is observed and below which it is not observed.
"Treatment" means the technology, treatment techniques, or other
procedures for compliance with 35 Ill. Adm. Code: Subtitle F.
"UNIT" MEANS ANY DEVICE, MECHANISM, EQUIPMENT, OR
AREA (EXCLUSIVE OF LAND UTILIZED ONLY FOR
AGRICULTURAL PRODUCTION).
(Section 3.62 of the Act)
"USEPA" means the United States Environmental Protection Agency.
SUBPART C: NONDEGRADATION PROVISIONS FOR
APPROPRIATE GROUNDWATERS
Section 620.310 Preventive Response Activities
a) The following preventive assessment must be undertaken:
1) If a preventive notification under Section 620.305(c) is provided by a
community water supply:
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A) The Agency shall notify the owner or operator of any identified
potential primary source, potential secondary source, potential
route, or community water supply well that is located within 2,500
feet of the wellhead.
B) The owner or operator notified under subsection (a)(1)(A) shall,
within 30 days of the date of issuance of such notice, sample each
water well or monitoring well for the contaminant identified in the
notice if the contaminant or material containing such contaminant
is or has been stored, disposed, or otherwise handled at the site. If
a contaminant identified under Section 620.305(a) is detected, then
the well must be resampled within 30 days of the date on which the
first sample analyses are received. If a contaminant identified under
Section 620.305(a) is detected by the resampling, preventive
notification must be given as set forth in Section 620.305.
C) If the Agency receives analytical results under subsection (a)(1)(B)
that show a contaminant identified under Section 620.305(a) has
been detected, the Agency shall:
i) Conduct a well site survey pursuant to Section 17.1(d) of
the Act, if such a survey has not been previously conducted
within the last 5 years; and
ii) Identify those sites or activities which represent a hazard to
the continued availability of groundwater for public use
unless a groundwater protection needs assessment has been
prepared pursuant to Section 17.1 of the Act.
2) If a preventive notification is provided under Section 620.305(c) by a
non-community water supply or for multiple private water supply wells,
the Department of Public Health shall conduct a sanitary survey within
1,000 feet of the wellhead of a non-community water supply or within 500
feet of the wellheads for multiple private water supply wells.
3) If a preventive notification under Section 620.305(b) is provided by the
owner or operator of a regulated entity and the applicable standard in
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Subpart D has not been exceeded:
A)
The appropriate regulatory agency shall determine if any of the
following occurs for Class I: Potable Resource Groundwater:
i) The levels set forth below are exceeded or are changed for
pH:
Constituent Criterion
(mg/l)
para-Dichlorobenzene 0.005
ortho-Dichlorobenzene 0.01
Ethylbenzene 0.03
Methyl Tertiary-Butyl Ether 0.02
Phenols 0.001
Styrene 0.01
Toluene 0.04
Xylenes 0.02
ii) A statistically significant increase occurs above background
(as determined pursuant to other regulatory procedures
(e.g., 35 Ill. Adm. Code 616, 724, 725 or 811)) for arsenic,
beryllium, cadmium, chromium, cyanide, lead, mercury or
thallium (except due to natural causes); or for aldicarb,
atrazine, carbofuran, dalapon, dinoseb, endrin, endothall,
hexachlorocyclopentadiene, lindane (gamma-hexachloro
cyclohexane), 2,4-D, 1,1-dichloroethylene,
cis-1,2-dichloro-ethylene, trans-1,2-dichloroethylene,
methoxychlor, monochlorobenzene, picloram, 2,4,5-TP
(Silvex), 1,2,4-trichlorobenzene, 1,1,2-trichloroethane, and
1,1,1-trichloroethane.
Constituent Criterion
(mg/L)
BETX 0.095
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iv) For pH, a statistically significant change occurs from
background.
(Board Note: Constituents that are carcinogens have not been listed in
subsection (a)(3)(A) because the standard is set at the PQL and any
exceedence thereof is a violation subject to corrective action.)
B) The appropriate agency shall determine if, for Class III: Special
Resource Groundwater, the levels as determined by the Board are
exceeded.
C) The appropriate regulatory agency shall consider whether the
owner or operator reasonably demonstrates that:
i) The contamination is a result of contaminants remaining in
groundwater from a prior release for which appropriate
action was taken in accordance with laws and regulations in
existence at the time of the release;
ii) The source of contamination is not due to the on-site
release of contaminants; or
iii) The detection resulted from error in sampling, analysis, or
evaluation.
D) The appropriate regulatory agency shall consider actions necessary
to minimize the degree and extent of contamination.
b) The appropriate regulatory agency shall determine whether a preventative
response must be undertaken based on relevant factors including, but not limited
to, the considerations in subsection (a)(3).
c) After completion of preventive response pursuant to authority of an appropriate
regulatory agency, the concentration of a contaminant listed in subsection
(a)(3)(A) in groundwater may exceed 50 percent of the applicable numerical
standard in Subpart D only if the following conditions are met:
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1) The exceedence has been minimized to the extent practicable;
2) Beneficial use, as appropriate for the class of groundwater, has been
assured; and
3) Any threat to public health or the environment has been minimized.
d) Nothing in this Section shall in any way limit the authority of the State or of the
United States to require or perform any corrective action process.
Source: Amended at ___ Ill. Reg. ____, effective _____________)
SUBPART D: GROUNDWATER QUALITY STANDARDS
Section 620.410 Groundwater Quality Standards for Class I: Potable Resource
Groundwater
a) Inorganic Chemical Constituents
Except due to natural causes or as provided in Section 620.450, concentrations of
the following chemical constituents must not be exceeded in Class I groundwater:
Constituent Units Standard
Antimony mg/L 0.006
Arsenic mg/L 0.05
Barium mg/L 2
Beryllium mg/L 0.004
Boron mg/L 2
Cadmium mg/L 0.005
Chloride mg/ 200
Chromium mg/l 0.1
Cobalt mg/l 1
Copper mg/L 0.65
Cyanide mg/L 0.2
Fluoride mg/L 4.0
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Iron mg/L 5
Lead mg/L 0.0075
Manganese mg/L 0.15
Mercury mg/L 0.002
Nickel mg/L 0.1
Nitrate as N mg/L 10
Radium-226 pCi/L 20
Radium-228 pCi/L 20
Selenium mg/L 0.05
Silver mg/L 0.05
Sulfate mg/L 400
Thallium mg/L 0.002
Total Dissolved
Solids (TDS) mg/L 1,200
Zinc mg/L 5
b) Organic Chemical Constituents
Except due to natural causes or as provided in Section 620.450 or subsection (c),
concentrations of the following organic chemical constituents must not be
exceeded in Class I groundwater:
Constituent Standard (mg/L)
Alachlor* 0.002
Aldicarb 0.003
Atrazine 0.003
Benzene* 0.005
Benzo(a)pyrene* 0.0002
Carbofuran 0.04
Carbon Tetrachloride 0.005
Chlordane* 0.002
Dalapon 0.2
Dichloromethane* 0.005
Di(2-ethylhexyl)phthalate* 0.006
Dinoseb 0.007
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Endothall 0.1
Endrin 0.002
Ethylene Dibromide* 0.00005
Heptachlor* 0.0004
Heptachlor Epoxide* 0.0002
Hexachlorocyclopentadiene 0.05
Lindane (Gamma-Hexachloro
cyclohexane) 0.0002
2,4-D 0.07
ortho-Dichlorobenzene 0.6
para-Dichlorobenzene 0.075
1,2-Dibromo-3-Chloropropane* 0.0002
1,2-Dichloroethane* 0.005
1,1-Dichloroethylene 0.007
cis-1,2-Dichloroethylene 0.07
trans-1,2-Dichloro-ethylene 0.1
1,2-Dichloropropane* 0.005
Ethylbenzene 0.7
Methoxychlor 0.04
Methyl Tertiary-Butyl Ether 0.07
Monochlorobenzene 0.1
Pentachlorophenol* 0.001
Phenols 0.1
Picloram 0.5
Polychlorinated Biphenyls (PCB's)
(as decachloro-bipehenyl) * 0.0005
Simazine* 0.004
Styrene 0.1
2,4,5-TP (Silvex) 0.05
Tetrachloroethylene* 0.005
Toluene 1
Toxaphene* 0.003
1,2,4-Trichlorobenzene 0.07
1,1,2-Trichloroethane 0.005
1,1,1-Trichloroethane 0.2
Trichloroethylene* 0.005
Vinyl Chloride* 0.002
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Xylenes 10
*Denotes a carcinogen.
c) Complex Organic Chemical Mixtures
Concentrations of the following chemical constituents of gasoline, diesel fuel, or
heating fuel must not be exceeded in Class I groundwater:
Constituent Standard (mg/L)
Benzene* 0.005
BETX 11.705
*Denotes a carcinogen.
d) pH
Except due to natural causes, a pH range of 6.5 - 9.0 units must not be exceeded in
Class I groundwater.
e) Beta Particle and Photon Radioactivity
1) Except due to natural causes, the average annual concentration of beta
particle and photon radioactivity from man-made radionuclides shall not
exceed a dose equivalent to the total body organ greater than 4 mrem/year
in Class I groundwater. If two or more radionuclides are present, the sum
of their dose equivalent to the total body, or to any internal organ shall not
exceed 4 mrem/year in Class I groundwater except due to natural causes.
2) Except for the radionuclides listed in subsection (e)(3), the concentration
of man-made radionuclides causing 4 mrem total body or organ dose
equivalent must be calculated on the basis of a 2 liter per day drinking
water intake using the 168-hour data in accordance with the procedure set
forth in NCRP Report Number 22, incorporated by reference at in Section
620.125(a).
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3) Except due to natural causes, the average annual concentration assumed to
produce a total body or organ dose of 4 mrem/year of the following
chemical constituents shall not be exceeded in Class I groundwater:
Critical Standard
Constituent Organ (pCi/l)
Tritium Total body 20,000
Strontium-90 Bone marrow 8
(Source: Amended at ___ Ill. Reg. ____, effective _____________)
Section 620.420 Groundwater Quality Standard for Class II: General resource
Groundwater
a) Inorganic Chemical Constituents
1) Except due to natural causes or as provided in Section 620.450 or
subsection (a)(3) or (d), concentrations of the following chemical
constituents must not be exceeded in Class II groundwater:
Constituent Standard (mg/L)
Antimony 0.024
Arsenic 0.2
Barium 2
Beryllium 0.5
Cadmium 0.05
Chromium 1
Cobalt 1
Cyanide 0.6
Fluoride 4.0
Lead 0.1
Mercury 0.01
Nitrate as N 100
Thallium 0.02
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2) Except as provided in Section 620.450 or subsection (a)(3) or (d),
concentrations of the following chemical constituents must not be
exceeded in Class II groundwater:
Standard
Constituent (mg/L )
Boron 2.0
Chloride 200
Copper 0.65
Iron 5
Manganese 10
Nickel 2
Selenium 0.05
Total Dissolved Solids(TDS) 1,200
Sulfate 400
Zinc 10
3) The standard for any inorganic chemical constituent listed in subsection
(a)(2), for barium, or for pH does not apply to groundwater within fill
material or within the upper 10 feet of parent material under such fill
material on a site not within the rural property class for which:
A) Prior to the effective date of this Part, surficial characteristics have
been altered by the placement of such fill material so as to impact
the concentration of the parameters listed in subsection (a)(3), and
any on-site groundwater monitoring of such parameters is available
for review by the Agency.
B) On the effective date of this Part, surficial characteristics are in the
process of being altered by the placement of such fill material,
which proceeds in reasonably continuous manner to completion, so
as to impact the concentration of the parameters listed in
subsection (a)(3), and any on-site groundwater monitoring of such
parameters is available for review by the Agency.
4) For purposes of subsection (a)(3), the term "fill material" means clean
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earthen materials, slag, ash, clean demolition debris, or other similar
materials.
b) Organic Chemical Constituents
1) Except due to natural causes or as provided in Section 620.450 or
subsection (b)(2) or (d), concentrations of the following organic chemical
constituents must not be exceeded in Class II groundwater:
Constituent Standard (mg/L)
Alachlor* 0.010
Aldicarb 0.015
Atrazine 0.015
Benzene* 0.025
Benzo(a)pyrene* 0.002
Carbofuran 0.2
Carbon Tetrachloride* 0.025
Chlordane* 0.01
Dalapon 2.0
Dichloromethane* 0.05
Di(2-ethylhexyl)phthalate* 0.06
Dinoseb 0.07
Endothall 0.1
Endrin 0.01
Ethylene Dibromide* 0.0005
Heptachlor* 0.002
Heptachlor Epoxide* 0.001
Hexachlorocyclopentadiene 0.5
Lindane (Gamma-Hexachloro-
cyclohexane) 0.001
2,4-D 0.35
ortho-Dichlorobenzene 1.5
para-Dichlorobenzene 0.375
1,2-Dibromo-3-Chloropropane* 0.002
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1,2-Dichloroethane* 0.025
1,1-Dichloroethylene 0.035
cis-1,2-Dichloroethylene 0.2
trans-1,2-Dichloroethylene 0.5
1,2-Dichloropropane* 0.025
Ethylbenzene 1.0
Methoxychlor 0.2
Methyl Tertiary-Butyl Ether (MTBE) 0.07
Monochlorobenzene 0.5
Pentachlorophenol* 0.005
Phenols 0.1
Picloram 5.0
Polychlorinated Biphenyls (PCB's)
(as decachloro-biphenyl)* 0.0025
Simazine* 0.04
Styrene 0.5
2,4,5-TP 0.25
Tetrachloroethylene* 0.025
Toluene 2.5
Toxaphene* 0.015
1,2,4-Trichlorobenzene 0.7
1,1,2-Trichloroethane 0.05
1,1,1-Trichloroethane 1.0
Trichloroethylene* 0.025
Vinyl Chloride* 0.01
Xylenes 10
*Denotes a carcinogen.
2) The standards for pesticide chemical constituents listed in subsection
(b)(1) do not apply to groundwater within 10 feet of the land surface,
provided that the concentrations of such constituents result from the
application of pesticides in a manner consistent with the requirements of
the Federal Insecticide, Fungicide and Rodenticide Act (7 U.S.C. 136 et
seq.) and the Illinois Pesticide Act [415ILCS 60].
c) Complex Organic Chemical Mixtures
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Concentrations of the following organic chemical constituents of gasoline, diesel
fuel, or heating fuel must not be exceeded in Class II groundwater:
Constituent Standard (mg/L)
Benzene* 0.025
BETX 13.525
*Denotes a carcinogen.
d) pH
Except due to natural causes, a pH range of 6.5 - 9.0 units must not be exceeded
in Class II groundwater that is within 5 feet of the land surface.
(Source: Amended at ___ Ill. Reg. ____, effective _____________)
Section 620.505 Compliance Determination
a) Compliance with standards at a site is to be determined as follows:
1) For a structure (e.g., buildings), at the closest practical distance beyond the
outermost edge for the structure.
2) For groundwater that underlies a potential primary or secondary source,
the outermost edge as specified in Section 620.240(e)(1).
3) For groundwater that underlies a coal mine refuse disposal area, a coal
combustion waste disposal area, or an impoundment that contains sludge,
slurry, or precipitated process material at a coal preparation plant, the
outermost edge as specified in Section 620.240(f)(1) or location of
monitoring wells in existence as of the effective date of this Part on a
permitted site.
4) For a groundwater management zone, as specified in a corrective action
process.
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5) For groundwater Aat any point, where at which groundwater monitoring is
conducted using a any water well, or a monitoring well which that meets
one of the following conditions:
A) For a potable water supply well if geologic log(s) exist for this well
or geologic logs in the immediate 1,000-foot area of this well are
representative of the hydrogeologic materials encountered by this
well as determined by a licensed professional geologist or a
registered professional engineer; or
B)A)
For a potable water supply well other than a community water
supply well, a construction report has been filed with the
Department of Public Health for such potable well, or such well
has been located and constructed (or reconstructed) to meet the
Illinois Water Well Construction Code [415 ILCS 30] and 77 Ill.
Adm. Code 920,
C) For a potable water supply well which was constructed prior to
August 20, 1965, the enactment of the Illinois Water Well
Construction Code [415 ILCS 30/1]- and meets all of the following
criteria:
i) Construction must be done in a manner which will enable
the collection of groundwater samples that represent
in situ
groundwater conditions;
ii) Casings and screens must be made from durable material
resistant to expected chemical or physical degradation
which do not interfere with the quality of groundwater
samples being collected; and
iii) The annular space opposite the screened section of the well
(i.e., the space between the bore hole and well screen) must
be filled with gravel or sand if necessary to collect
groundwater samples. The annular space above and below
the well screen must be sealed to prevent migration of
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water from adjacent formations and the surface to the
sampled depth.
D)B)
For a community water supply well, such well has been permitted
by the Agency, or has been constructed in accordance with 35 Ill.
Adm. Code 602.115.
E)C)
For a water well other than a potable water supply well (e.g., a
livestock watering well or an irrigation well), a construction report
has been filed with the Department of Public Health or the
Department of Mines and Minerals for such well, or such well has
been located and constructed (or reconstructed) to meet the Illinois
Water Well Construction Code [415 ILCS 30, as amended] and 35
Ill. Adm. Code 920.
F)D)
For a monitoring well, such well meets the following requirements:
i) Construction must be done in a manner that will enable the
collection of groundwater samples;
ii) Casings and screens must be made from durable material
resistant to expected chemical or physical degradation that
do not interfere with the quality of groundwater samples
being collected; and
iii) The annular space opposite the screened section of the well
(i.e., the space between the bore hole and well screen) must
be filled with gravel or sand if necessary to collect
groundwater samples. The annular space above and below
the well screen must be sealed to prevent migration of
water from adjacent formations and the surface to the
sampled depth.
6) For groundwater at any potable water supply well listed below, monitoring
shall not be conducted:
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A) For a water well:
i) Less than 15 feet in total depth from the land surface, and
ii) bored or dug, and
iii) constructed of permeable materials (e.g., cement, tile, stone
or brick), and
iv) 36 inches or more diameter.
B) For a water well with water quality problems due to damaged well
construction materials or poorly-designed well construction;
C) For a water well in a basement or pit; or
D) For a water well water from a holding tank.
b)
For a spring, compliance with this Subpart shall be determined at the point of
emergence.
(Source: Amended at ___ Ill. Reg. ____, effective _____________)