ILLINOIS POLLUTION CONTROL
    BOARD
    July 9, 1992
    IN THE MATTER OF:
    )
    )
    GROUNDWATER QUALITY STANDARDS:
    )
    R89-14(C)
    AMENDMENTS TO 35 ILL. ADM. CODE
    )
    (Rulemaking)
    303,
    616,
    AND
    620
    )
    Proi:osed Rule
    Second Notice
    OPINION
    AND
    ORDER OF THE
    BOARD
    (by R.C.
    Flema.):
    In this docket the Board
    is considering certain amendments
    necessary to complete rulemaking on groundwater quality
    standards.
    The primary rulemaking,
    in which the groundwater
    quality standards1 were established, was completed in November
    1991 within docket R89—14(B)2.
    The instant docket considers the remaining matter of how to
    address the connection between the new Part 620 groundwater
    quality regulations and the previously existing general water
    quality standards of Subtitle C3.
    In particular,
    the principal
    issue for decision is whether:
    (a)
    All underground waters should be severed from sOme
    or part of their association
    with Subtitle C; or
    (b)
    Only groundwaters should be severed from their
    association with Subtitle C.
    Among active participants and conunenters in this proceeding,
    the Illinois Environmental Protection Agency (Agency),
    the
    Illinois Department of Mines and Minerals (Mines and Minerals),
    and the Illinois Steel Group have expressed support for
    1
    Found at 35
    Ill. Adm. Code Part 620.
    2
    In the Matter
    of:
    Groundwater
    quality
    Standards
    (35
    Ill.
    Mm.
    Code 620),
    R89—14(B),
    November
    7,
    1991;
    15
    Ill.
    Reg.
    17614
    (December
    6,
    1991), effective November
    25, 1991.
    ~ Subtitle
    C
    consists
    of
    several,
    parts,
    of which
    Part
    302
    (Water Quality Sta.idards) and Part 303
    (Water Use Designations and
    Site Specific Water Quality Standards)
    are pertinent to the instant
    natter.
    Part. 302
    is divided into
    subpartsi
    of which
    Subpart A
    (General Water Quality Provisions),
    Subpart B
    (General.Use Water
    ~ualj.tyStandards), and Subpart C (Public and Food Processing Water
    3upply Standards)
    are the ~ertin~nI-
    ~ii1-~r~.

    —2—
    alternative
    (a)4.
    The McHenry County Defenders, Citizens for a
    Better Environment,
    and the Illinois Chapter of the Sierra Club
    (collectively as “Defenders”) have.expressed support for
    alternative
    (b)5.
    A subsidiary matter that the Board also today addresses
    is
    an amendment to Part 616 at Section 616.104 necessary to correct
    a typographical error
    in that section (see following discussion).
    Today the Board adopts. for second notice the amendments as
    proposed’ at first notice on April 23,
    19926.
    BACKGROUND
    Prior to adoption of 35 Ill.
    Adm. Code: Part 620, certain
    groundwaters were subject to the water quality standards found
    in
    35 Ill.
    Adin.
    Code: Subtitle
    C.
    This connection occurs in
    Subtitle C at Section 303.203.
    This section currently reads as
    follows:
    Section 303.203
    Underground Waters
    The underground waters of Illinois which are a present
    or a potential source of water for public or food
    processing supply shall meet the general use and public
    and food processing water supply standards of Subparts
    B and C, Part 302, except due to natural causes.
    The matter of amending Section 303.203 has been one of the
    issues addressed in the general groundwater rulemaking
    proceedings from the very beginning7.
    However,
    it was not until
    the larger matters surrounding groundwater standards were decided
    in Docket B that much focus has come to the Section 303.203
    matter.
    It is generally agreed that to allow Section 303.203 to
    exist unaltered is to allow for conflict and confusion.
    The
    ‘~
    See Public
    Comments #67
    and
    #75
    (Agency),
    #70
    (Mines and
    Minerals),
    #69
    and
    #74
    (Illinois
    Steel
    Group),
    and
    #71
    (joint
    comment of Agency, Mines and Minerals, and Illinois Steel Group).
    ~ See Public Comment #76.
    6
    In the Matter
    of:
    Groundwater quality Standards
    (35 Iii.
    Adin. Code 303,
    616, and 620), R89—14(C), April 23,
    1992; Notice of
    withdrawal
    published at
    16
    Ill.
    Reg.
    7511
    (May
    8,
    1992);
    First
    Notice publication of amendments for Parts 303,
    616, and 620 at 16
    Ill. Reg.
    7302,’ 7295,
    and 7286, respectively,
    (May 8,
    1992).
    ~‘
    An expanded history of this issue is given in the April 23,
    1992 first not.ice opinion (see reference at footnote Ibid).
    01 35-009i

    —3—
    question is how to eliminate this circumstanc
    and in particular
    how to address underground waters that are nc. groundwaters.
    It is to be first understood that not all underground waters
    are groundwaters.
    “Underground water” is defined in the Illinois
    Groundwater Protection Act
    (IGPA)8:
    “UNDERGROUND WATER” MEANS ALL WATER BENEATH
    THE
    LAND
    SURFACE.
    (Ill. Rev. Stat.
    1991,
    ch.
    lii 1/2, par.
    7453(k).)
    “Groundwater” is defined in both the Illinois Environmental
    Protection Act
    (Act)
    and the IGPA:
    “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
    ATMOSPHERICPRESSURE.
    (Ill.
    Rev.
    Stat.
    1991,
    ch.
    111 1/2, par. 1003.64 and par. 7453(g).)
    Pursuant to these definitions, “groundwater”
    is a subset of
    “underground waters”..
    Among other matters,
    it is that subset
    that occurs within the saturated zone.
    jLQ~included within
    groundwater are ur~dergroundwaters that occur in unsaturated
    portions of the subsurface,
    such as within the aerated portions
    of the soil.
    This would also include water normally found in the
    root zone of crops,
    since the roots of most crops do not
    propagate into the saturated zone.
    The solution that the Board proposed at first notice,
    and
    that it today adopts ‘for second notice,
    is to replace existing
    Section 303.203 with the following:
    Section 303.203
    Underground Waters
    35 Ill. Adm. Code 302.Subparts B and C do not apply to
    underground waters, except as provided at 35
    Ill. Adm.
    Code 620.450(b).
    The effect is to remove the applicability of the General Use
    Water Quality Standards
    (Subpart B) and the Public and Food
    Processing Water Supply Standards (Subpart C) from
    ~
    underground waters.
    Importantly, Subpart A, which includes the
    ~ A similar,
    and earlier definition occurs in the Boards rules
    and regulations in the introduction to Subtitle C:
    Underground Waters: ‘Any waters
    of
    the
    State
    located beneath the surface of the earth.
    (35
    Ill.
    Adin.
    Code 301.420.)
    0135-0095

    —4—
    nondegradation provision at Section 302.105, would continue to
    apply to all underground waters.
    As also noted at first notice,
    it is additionally necessary
    that the form of the reference to the Subtitle C standards at
    Section 620.450(b)
    be amended to cite directly to the applicable
    parts rather than to the applicability section,
    303.203.
    This
    is
    accomplished as detailed in the attached order.
    DISCUSSION
    The principal reason why there are now groundwater standards
    different from the General Use and Public and Food Processing
    Water Supply Standards of Subtitle C is that the latter standards
    are not fully relevant to groundwater.
    This Board has observed
    at length that groundwaters differ in important regards from
    surface waters,
    and that standards based on surface water
    considerations
    (as are the Subtitle C standards)
    often have no
    basis in groundwater considerations9.
    For example, toxicity to
    aquatic organisms is the factor that most often controls the
    General Use Standards10
    toxicity to aquatic organisms is not a
    relevant groundwater matter.
    The necessary distinction between surface water and
    groundwater is further recognized in the mandate of the IGPA that
    water quality standards specific to groundwater be developed.
    In
    particular,
    the. legislature has declared:
    the Board shall promulgate the water quality
    standards for groundwater.
    In promulgating these
    regulations, the Board shall
    ...
    consider the
    following:
    ~ See,
    for example,
    In the Matter of:
    A Plan
    for Protecting’
    Illinois
    Groundwater
    R86-8
    (August
    28,
    1986).
    This
    a
    report
    prepared by the Board for the Illinois General Assembly pursuant to
    P.A.
    83-1268 and 13.1 of the Act.
    Particularly pertinent sections
    include: Groundwater versus Underground Water Protection
    (p.
    1,11—1
    to 111—2), Dissimilarities between Surface Waters and Groundwaters
    (p. 111-2 to 111-6), Existing Standards for Groundwater Protection
    (p.
    IV—1 to. IV—6),
    Rationale- for Water Quality Standards
    (p.
    IV-6
    to IV—7), Recommendations for Groundwater Standards
    (p. IV—7 to IV—
    18)
    10
    It
    should
    be
    noted
    that
    during
    the
    pendency
    of
    the
    groundwater rulemakings, the Subtitle C standards were amended to
    place even greater emphasis on toxicity to aquatic organisms than
    had previously been the case.
    See In the Matter of: Amendments to
    Title
    35,
    Subtitle
    C
    (Toxics Control)
    R88-2l
    (January 25,
    1990),
    final opinion and order.
    0135-0096

    —5—
    1.
    recognition that groundwaters differ
    in many
    important respects from surface waters,
    including water quality, rate of movement,
    direction of flow, accessibility,’
    susceptibility to pollution,
    and use
    (Ill.
    Rev.
    Stat.
    1991,
    ch 111½,
    par. 7458)
    Although much of what has been said on this topic both in
    this proceeding and earlier has focused solely on groundwater,
    almost all’ is also pertinent to the broader matter of underground
    water.
    In particular, there is little in the General Use and
    Public and Food Processing Water Supply Quality Standards that
    seems to be germane to underground waters.
    The prohibition
    against offensive conditions of sludge, bottom deposits’,
    floating
    debris, algal growth,
    etc.
    of Section 302.203
    is not germane; the
    aquatic toxicity standards of Sections 302.208 and 302.210 are
    not germane; the reversor and lake phosphorus standard of Section
    302.205
    is not germane; the fecal coliform standards of Sections
    302.208 and 302.306 and the river temperature limitations of
    Section 302.211 are not germane; the algicide permits of Section
    302.302 and the finished water standards of Section 302.303 are
    not germane.
    The pH and dissolved oxygen standards of Sections
    302.204 and 302.206 are,
    at best, of questionable relevance.
    Some of the ‘Subtitle C standards,
    if applied to underground
    waters, would have fully unacceptable consequences.
    For example,
    Section
    302’. 212 restricts ammonia concentrations to the low
    levels necessary to protect sensitive aquatic life in surface
    waters.
    These levels are far below those that result in the
    unsaturated zone due to application of ammonia fertilizers.
    Thus,
    application of the Section 302.212 ammonia limitations to
    underground waters in the unsaturated zone would be tantamount to
    a prohibition against application of ammonia fertilizer!
    In sum, the Board cart see no rationale for continuing the
    applicability of the General Use or Public and Food Processing
    Water Supply Quality Standards to underground waters in general.
    These standards were originally designed to protect surface
    waters.
    Moreover, they have evolved even more strongly in
    support of this sole mission as the result of recent rulemakings.
    A general severance is now warranted.
    The Board notes that the Defenders object to this course of
    action.
    (PC #76.)
    Among the Defenders’ observations
    is that the
    IGPA mandate directs the Board to address groundwater standards,
    not underground water standards.
    From this point the implication
    is left that the Board
    lacks authority for today’s action.
    ‘The
    Board disagrees.
    The Board has authority to generally amend
    its.
    regulations pursuant to Title VII of the Act.
    0135-0097

    —6—
    Additionally, the Board notes that the Defenders contest the
    allegation of the Agency,, Mines and Minerals, and the Steel Group
    that Part 620 regulations were “intended to replace the existing
    water quality standards
    ‘with respect to the saturated
    unsaturated zones of underground waters”.
    (PC #76 at
    3 quoting
    PC #71 at 1-2; emphasis added.)
    The Board agrees with the
    Defenders to the extent that it finds no support for the
    contention that the Part 620 regulations are or were intended to
    have application to underground waters within the unsaturated
    zone;’ the record is indeed replete with pleadings and explicit
    Board findings to the contrary.
    CORRECTIONS
    The Board notes that the Joint Committee on Administrative
    Rules alerted it to a typographical error in Section 616.104(b).
    The error consists of a phrase inadvertently dropped from the
    subsection.
    The subsection quotes statutory language.
    The Board
    proposes to correct this oversight in this docket so as to make
    the correction as expeditiously as possible.
    The Board notes that the Agency suggests corrections of two
    typographical errors it has found within Sections 620.210 and
    620.410.
    (PC #75 at 2-4.)
    Unfortunately, the Board cannot
    reopen these sections without publishing the changes for first
    notice in the Illinois Register,
    an action which would cause
    delay in this proceeding.
    The Agency is requested to repropose
    these amendments in a new docket as soon as it finds it
    practicable.
    ORDER
    The Board hereby directs that second notice of the following
    proposed amendments be submitted to the Joint Committee on
    Administrative Rules.
    TITLE 35:
    ENVIRONMENTAL PROTECTION
    SUBTITLE C:
    WAT,ER POLLUTION
    CHAPTER
    I:
    POLLUTION CONTROL
    BOARD
    PART 303
    WATER USE DESIGNATIONS AND SITE SPECIFIC
    WATER QUALITY STANDARDS
    SUBPART B:
    NONSPECIFIC WATER USE DESIGNATIONS
    Section 303.203
    Underground Waters
    35
    Ill. Adm. Code 302.Subparts B and C do not apply to
    underground waters, except as provided at 35
    Ill. Adm. Code
    620.450(b)Thc underground wator~of Illinoic which arc a prcc3ent
    0135-0098

    —7—
    or a potcntial source of watcr for public or food processing
    supply shall meet thc gcncral usc and public and food processing
    water supply standards of Subparts B and C,
    Part 302, cxccpt due
    tn
    n~itur-,1
    ~
    0135-0099

    —8—
    TITLE
    35:
    ENVIRONMENTAL
    PROTECTION
    SUBTITLE
    F:
    PUBLIC
    WATER
    SUPPLIES
    CHAPTER
    I:
    POLLUTION
    CONTROL
    BOARD
    PART
    616
    NEW
    ACTIVITIES
    IN
    A
    SETBACK
    ZONE
    OR
    REGULATED
    RECHARGE
    AREA
    SUBPART A:
    GENERAL
    Section 616.104
    Exceptions to Prohibitions
    a)
    THE OWNER OF A NEW POTENTIAL PRIMARY SOURCE OR A POTENTIAL
    SECONDARY SOURCE
    MAY
    SECURE A WAIVER FROM THE prohibitions
    specified in Sections 616.402(a),
    616.422(a),
    616.442,
    616.462(a),
    616.602,
    616.622,
    616.702 or 616.722(a)
    against
    ‘construction or operation within the setback zone FOR A
    POTABLE WATER SUPPLY WELL OTHER THAN A COMMUNITY WATER
    SUPPLY.
    A WRITTEN REQUEST FOR A WAIVER SHALL BE MADE TO THE
    OWNER OF THE WATER WELL AND THE AGENCY.
    SUCH REQUEST SHALL
    IDENTIFY THE NEW OR PROPOSED POTENTIAL SOURCE,
    SHALL
    GENERALLY DESCRIBE THE POSSIBLE EFFECT OF SUCH POTENTIAL
    SOURCE UPON THE WATER WELL
    AND ANY
    APPLICABLE TECHNOLOGY-
    BASED CONTROL WHICH WILL BE UTILIZED TO MINIMIZE THE
    POTENTIAL FOR CONTAMINATION,
    AND
    SHALL STATE WHETHER,
    AND
    UNDER
    WHAT
    CONDITIONS, THE REQUESTOR WILL PROVIDE AN
    ALTERNATIVE POTABLE WATER SUPPLY.
    WAIVER MAYBE GRANTED BY
    THE OWNER OF THE WATER WELL NO LESS THAN 90 DAYS AFTER
    RECEIPT UNLESS PRIOR TO SUCH TIME THE AGENCY NOTIFIES THE
    WELL OWNER THAT IT DOES NOT CONCUR WITH THE REQUEST.
    (Section 14.2(b)
    of the Act)
    b)
    ,
    TilE AGENCY SHALL NOT CONCUR WITH ANY” SUCH REQUEST WHICH
    FAILS TO ACCURATELY DESCRIBE REASONABLY FORESEEABLE EFFECTS
    OF THE POTENTIAL SOURCE OR POTENTIAL ROUTE UPON THE WATER
    WELL OR ANY APPLICABLE TECHNOLOGY-BASED CONTROLS.
    SUCH
    NOTIFICATION BY THE AGENCY SHALL BE IN WRITING, AND SHALL
    INCLUDE A STATEMENT OF REASONS FOR THE NONCONCURRENCE.
    WAIVER OF THE MINIMUM SETBACK ZONE SHALL EXTINGUISH THE
    WATER WELL OWNER’S RIGHTS UNDER SECTION 6b OF THE ILLINOIS
    WATER WELL CONSTRUCTION CODE BUT SHALL NOT PRECLUDE
    ENFORCEMENT OF ANY
    LAW
    REGARDING WATER POLLUTION.
    IF THE
    OWNER OF THE WATER WELL HAS NOT GRANTED A WAIVER WITHIN 120
    DAYS AFTER RECEIPT OF THE REQUEST OR THE AGENCY’ HAS NOTIFIED
    THE OWNER THAT IT DOES NOT CONCUR WITH THE REQUEST, THE
    OWNER OF A POTENTIAL SOURCE
    O1~
    POTENTIAL ROUTE
    MAY
    FILE A
    PETITION FOR AN EXCEPTION WITH THE BOARD AND THE AGENCY
    PURSUANT TO subsection
    (b) OF THIS SECTION.
    (Section
    14.2(b)
    of the Act)
    c)
    NO WAIVER UNDER THIS SECTION IS REQUIRED WHERE THE POTABLE
    WATER SUPPLY WELL IS PART OF A PRIVATE WATER SYSTEM AS
    DEFINED
    IN THE ILLINOIS GROUNDWATER PROTECTION ACT,
    AND, THE
    OWNER OF SUCH WELL WILL ALSO BE THE OWNER OF A NEW POTENTIAL
    SECONDARY SOURCE OR A POTENTIAL ROUTE.
    IN SUCH INSTANCES, A
    PROHIBITION OF 75 FEET SHALL APPLY AND THE OWNER.SH’ALL
    0135-0100

    —9—
    NOTIFY THE AGENCY OF THE INTENDED ACTION SO THAT THE AGENCY
    MAY PROVIDE INFORMATION REGARDING THE POTENTIAL HAZARDS
    ASSOCIATED WITH LOCATION OF A POTENTIAL SECONDARY SOURCE OR
    POTENTIAL ROUTE IN CLOSE PROXIMITY TO A POTABLE WATER SUPPLY
    WELL.
    (Section 14.2(b) of the Act)
    d)
    THE BOARD MAY GRANT AN EXCEPTION FROM THE SETBACK
    REQUIREMENTS OF THIS SECTION AND SECTION 14.3 TO THE OWNER
    OF A NEW POTENTIAL PRIMARY SOURCE OTHER THAN LANDFILLING OR
    LAND TREATING,
    OR A NEW POTENTIAL SECONDARY SOURCE.
    THE
    ‘OWNER SEEKING AN EXCEPTION WITH RESPECT TO A COMMUNITY WATER
    SUPPLY WELL SHALL FILE A PETITION WITH THE BOARD AND THE
    AGENCY.
    THE OWNER SEEKING AN EXCEPTION WITH RESPECT TO: A
    ‘PpTABLE WATER SUPPLY WELL SHALL FILE A PETITION WITH THE
    BOARD AND THE AGENCY, AND SET FORTH THEREIN
    THE
    CIRCUMSTANCES UNDER WHICH A WAIVER HAS
    BEEN
    SOUGHT
    BUT
    NOT
    OBTAINED PURSUANT TO subsection
    (a) OF THIS SECTION.
    A.
    PETITION SHALL BE ACCOMPANIED BY PROOF THAT THE OWNER OF
    EACH POTABLE WATER SUPPLY WELL FOR WHICH SETBACK
    REQUIREMENTS WOULD BE AFFECTED BY THE REQUESTED EXCEPTION
    -
    HAS BEEN NOTIFIED AND BEEN PROVIDED WITH A COPY OF THE
    PETITION.
    A PETITION SHALL SET FORTH SUCH FACTS AS MAY BE
    REQUIRED TO SUPPORT AN EXCEPTION,
    INCLUDING ~ GENERAL
    DESCRIPTION OF THE POTENTIAL IMPACTS OF SUCH POTENTIAL
    SOURCE OR POTENTIAL ROUTE UPON GROUNDWATERS AND THE AFFECTEL
    WATER WELL, AND AN EXPLANATION OF THE APPLICABLE TECHNOLOGY—
    BASED CONTROLS WHICH WILL BE UTILIZED TO MINIMIZE THE
    POTENTIAL FOR CONTAMINATION OF THE POTABLE WATER SUPPLY
    WELL.
    (Section 14.2(c)
    of the Act)
    e)
    THE
    BOARD
    SHALL
    GRANT
    AN EXCEPTION~ WHENEVER IT IS FOUND
    UPON
    PRESENTATION OF ADEQUATE PROOF, THAT COMPLIANCE WITH
    THE SETBACK REQUIREMENTS OF THIS SECTION WOULD POSE AN
    ARBITRARY AND UNREASONABLE HARDSHIP UPON THE PETITIONER,
    THAT THE PETITIONER WILL UTILIZE THE BEST AVAILABLE
    -
    TECHNOLOGY CONTROLS ECONOMICALLY ACHIEVABLE TO MINIMIZE THE
    LIKELIHOOD OF CONTAMINATION OF THE POTABLE WATER SUPPLY
    WELL, THAT THE MAXIMUM FEASIBLE ALTERNATIVE SETBACK WILL ‘BE
    UTILIZED, AND THAT THE LOCATION OF SUCH POTENTIAL SOURCE OR
    POTENTIAL ROUTE WILL NOT CONSTITUTE A SIGNIFICANT HAZARD TO
    THE POTABLE WATER SUPPLY WELL.
    (Section 14.2(c)
    of the Act)
    f)
    A DECISION MADE BY THE BOARD PURSUANT TO THIS’ SUBSECTION
    SHALL CONSTITUTE A FINAL DETERMINATION.
    (Section 14.2(c)
    ol
    the Act)
    -
    g)
    THE GRANTING OF AN EXCEPTION BY THE BOARD SHALL NOT
    EXTINGUISH THE WATER WELL OWNER’S RIGHTS UNDER SECTION 6b
    01
    THE ILLINOIS WATER WELL CONSTRUCTION CODE IN INSTANCES WHERI
    THE OWNER HAS ELECTED NOT TO PROVIDE A WAIVER PURSUANT TO
    subsection
    (a)
    OF THIS SECTION.
    (Section 14.2(a)
    of the
    Act)
    0135-0 lOt

    —10-
    TITLE 35: ENVIRONMENTAL PROTECTION
    SUBTITLE
    F’: PUBLIC WATER SUPPLIES
    CHAPTER
    I:
    POLLUTION
    CONTROL
    BOARD
    PART
    620
    GROUNDWATER QUALITY
    Section 620.450
    Alternative Groundwater Quality Standards
    a)
    Groundwater Quality Restoration Standards
    1)
    Any chemical constituent in groundwater within a
    groundwater management zone is subject to this
    Section.
    2)
    Except as provided in subsections
    (a) (3)
    or
    (a) (4)
    below, the standards as specified in Sections
    620.410, 620.420, 620.430, and 620.440 apply to
    any chemical constituent in groundwater within a
    groundwater management
    zone.
    3)
    Prior to completion of a corrective action
    described in Section 620.250(a), the standards
    as
    specified in Sections 620.410, 620.420,
    620.430,
    and 620.440 are not applicable to such released
    chemical constituent,
    provided that the initiated
    action proceeds in a timely and appropriate
    manner.
    4)
    After completion of a corrective action as
    described, in Section 62~.250(a), the standard for
    such released chemical constituent is:
    A)
    The standard as set forth in Section 620.410,
    620.420, 620.430,
    or 620.440,
    if the
    concentration as determined by groundwater
    monitoring of such constituent is less than
    or equal to the standard for the appropriate
    class set forth in those sections; or
    B)
    The concentration as determined by
    groundwater monitoring,
    if such concentration
    exceeds the standard for the appropriate
    class set forth in Section 620.410, 620.420,
    620.430,
    or 620.440 for such constituent,
    and:
    i)
    To the extent practicable,
    the
    exceedence has been minimized and
    beneficial
    use.,
    as appropriate for the
    class of groundwater, has been returned;
    and
    0135-0102

    —11—
    ii)
    Any threat to public health or the
    environment has been
    ~nimized.
    5)
    The Agency shall develop and maintain a listing of
    concentrations derived pursuant to subsection
    (a) (4) (B)
    above.
    This list shall be made
    available to the public and be updated
    periodically, but no less frequently than
    semi—annually.
    This listing shall
    be published in
    the Environmental Register.
    b)
    Coal Reclamation Groundwater Quality Standards
    1)
    Any inorganic chemical constituent or pH in
    groundwater, within an underground coal mine,, or
    within the cumulative impact area of groundwater
    for which the hydrologic balance has been
    disturbed from a permitted coal mine area pursuant
    to the Surface Coal Mining Land Conservation and
    Reclamation Act (Ill.
    Rev.
    Stat.
    1989,
    ch.
    96
    1/2,
    pars.
    7901.1 et seq.,
    as amended) and 62
    Ill. Adm.
    Code 1700 through 1850,
    is subject to this
    Section.
    2)
    Prior to completion of reclamation at a coal mine,
    the standards as specified in Sections 620.410(a)
    and
    (d),
    620.420(a)
    and
    (e),
    620.430 and 620.440
    are not applicable to inorganic constituents and
    pH.
    3)
    After completion of reclamation at a coal mine,
    the standards as specified in Sections 620.410(a)
    and
    (d),
    620.420(a), 620.430, and 620.440 are
    applicable to inorganic constituents and pH,
    except:
    A)
    The concentration of total dissolved solids
    (TDS)
    must not exceed:
    i)
    The post—reclamation concentration or
    3000 mg/L, whichever is less,
    for
    groundwater within the permitted area;
    or
    -
    ii)
    The post-reclamation concentration of
    TDS must not exceed the post—reclamation
    concentration or 5000 mg/L, whichever is
    less,
    for groundwater in underground
    coal mines and in permitted areas
    reclaimed after surface coal mining
    if
    the Illinois Department of Mines and
    Minerals and the Agency have determined
    that no significant resource groundwater
    0135-0 103

    —12—
    existed prior to mining
    (62
    Ill. Adm.
    Code 1780.21(f)
    and
    (g));
    and
    B)
    For chloride,
    iron,
    manganese and sulfate,
    the post—reclamation concentration within the
    permitted area must not be exceeded.
    C)
    For pH, the post-reclamation concentration
    within the permitted area must not be
    exceeded within Class
    I:
    Potable Resource
    Groundwater as specified in Section
    620.210(a) (4)
    4)
    A refuse disposal area (not contained within the
    area from which overburden has been removed)
    is
    subject to the inorganic chemical constituent and
    pH requirements of:
    A)
    35 Ill. Adm. Code—303.203 302.Subparts B and
    C,
    except due to natural causes,
    for such
    area that was placed into operation after
    February
    1,
    1983, and before the effective
    date of this Part, provided that the
    groundwater is a present or a potential
    source of water for public or food
    processing;
    ‘B)
    Section 620.440(c)
    for such area that was
    placed into operation prior to February
    1,
    1983, and has remained in continuous
    operation since that date;
    or
    C)
    Subpart D of this
    Part, for such area that is
    placed into operation on or after the
    effective date of this Part.
    5)
    For a refuse disposal area
    (not contained within
    the area from which overburden has been removed)
    that was placed into operation prior to February
    1,
    1983, and
    is modified after that date to
    include additional area, this Section applies to
    the area that meets the requirements of subsectior
    (b) (4) (C)
    and the following applies to the
    additional area:
    A)
    35
    Ill. Adm.
    Code—3-0’3.203 302.Subparts B and
    C,
    except due to natural causes,
    for such
    additional’ refuse disposal area that was
    placed into operation after February 1,
    1983,
    and before the effective date of this Part,
    provided that the groundwater is a present or
    a potential source’ of water
    for public or
    food
    processing;
    and
    0J35-0l0L~

    —13—
    B)
    Subpart D for such additional area that was
    placed into operation on or after the
    effective date of this Part.
    6)
    A coal preparation plant
    (not located in an area
    from which overburden has been removed) which~
    contains slurry material,
    sludge or other
    precipitated process material,
    is subject to the
    inorganic chemical constituent and pH requirements
    of:
    ‘A)
    35
    Ill. Adm. Code 303.203 302.Subparts B and
    C.
    except due to natural causes,
    for such
    plant that was placed into operation after
    February
    1,
    1983,
    and before the effective
    date of this Part, provided that the
    groundwater
    is
    a
    present
    or
    a
    potential
    source
    of
    water
    for
    public
    or
    food
    processing;
    B)
    Section 620.440(c)
    for such plant that was
    placed into operation prior to February
    1,
    1983,
    md has remained in continuous
    operation since that date;
    or
    C)
    Subpart D for such plant that is placed into
    operation on or after the effective date of
    this
    Part.
    7)
    For a coal preparation plant
    (not located
    in an
    area from which overburden has been removed) which
    contains slurry material,
    sludge or other
    precipitated
    process
    material,
    that
    was
    placed
    into operation prior to February
    1,
    1983,
    and
    is
    modified after that date to include additional
    area, this Section applies to the area that meets
    the
    requirements
    of
    subsection
    (b)
    (6)
    (C)
    and
    the
    following
    applies
    tO
    the
    additional
    area:
    A)
    35
    Ill.
    Adm.
    Code
    303.203
    302.Subparts
    B
    and
    C,
    except
    due
    to
    natural
    causes,
    for such
    additional area that was placed into
    operation after February
    1,
    1983, and before
    the effective date of this Part, provided
    that the groundwater is a present or a
    potential source of water for public or food
    processing;
    and
    B)
    Subpart D for such additional area that was
    placed into operation on or -after the
    effective
    date
    of
    this
    Part.
    IT IS SO ORDERED.
    01,35-0105

    —14—
    I,
    Dorothy M.
    Gunn, Clerk of the Illinois Pollution
    Control
    Board, hereby, certify that the above
    inion and order was
    adopted
    on
    the
    ~
    day
    of
    _____________________,
    1992,
    by
    a
    vote
    of
    —p
    .
    ~
    ~i.
    /LJ
    Dorothy N. ,G~I’nn, Clerk
    Illinois Po~tlutionControl Board
    0135-0 lOG

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