ILLINOIS POLLUTION CONTROL
    BOARD
    February 28,
    1991
    IN THE MATTER OF:
    )
    PETITION OF THE NUTRASWEET
    )
    AS 89-3
    COMPANY AND CONSUMERS ILLINOIS
    )(Adjusted Standard)
    WATER COMPANY FOR AN ADJUSTED
    )
    STANDARD FROM 35
    ILL. ADM.
    )
    CODE 304.105 OR 302.208,
    )
    STEVEN J. GOLDBERG OF THE NUTRASWEET COMPANY, AND LEE CUNNINGHAM
    AND JEFFREY C.
    FORT OF, GARDNER, CARTON
    & DOUGLAS, APPEARED ON
    BEHALF OF PETITIONERS.
    JOSE GONZALES, ASSISTANT COUNSEL, APPEARED ON BEHALF OF THE
    ILLINOIS ENVIRONMENTAL PROTECTION AGENCY.
    OPINION AND ORDER OF THE BOARD
    (by B. Forcade):
    This matter comes before the Board on
    a petition filed on
    June 30,
    1989 by The NutraSweet Company and Consumers Illinois
    Water Company (“NSC” and “CIWC” or collectively as “Petitioners”)
    for an adjusted standard from the Board’s water quality standard
    for total dissolved solids
    (“TDS”)
    found at
    35
    Iii. Adm. Code
    302.208 and from the requirement of
    35
    Ill. Adm. Code 304.105,
    that no effluent shall, alone or
    in combination with other
    sources,
    cause a violation of any applicable water quality
    standard.
    Section 302.208 provides that the concentration of TDS shall
    not exceed 1,000 mg/i.
    Petitioners seek an adjusted water
    quality standard of 2,100 mg/i for NSC’s TDS discharges to CIWC
    and for CIWC’s discharge of TDS, from the point of discharge from
    CIWC to Deer Creek,
    to the confluence of Deer Creek
    with Thorne
    Creek and downstream in that part of Thorne Creek to the “USGS”
    gaging station.
    CIWC’s TDS effluent discharge to Deer Creek
    would be limited
    to 2,100 mg/i as a daily maximum and 1,675 mg/i
    as
    a monthly average.
    The Illinois Environmental Protection
    Agency
    (“Agency”)
    supports the requested relief.
    Additionally,
    in comments filed on May 2,
    1990 the Agency agreed that
    monitoring requirements and limits on NSC’s discharges to CIWC
    should be addressed through modification of NSC’s operating
    permit which expires December
    29,
    1993.
    Accordingly, the Agency
    requests that the Board order the reopening of the NSC permit
    to
    reflect the proposed adjusted standard.
    119—105

    —2—
    Procedural History
    This matter initially came before the Board in a 1983
    variance proceeding
    in PCB 83—73.
    See Opinion and Order,
    December
    29, 1983.
    NSC and CIWC are now operating under a
    subsequent variance from 35
    Iii. Adm. Code 304.105 as
    it applies
    to the TDS standard of
    35 Iii. Adm. Code 302.208, granted by the
    Board in PCB 88—84 on December 15,
    1988.
    The variance granted in
    1988 was conditioned upon NSC’s filing a site—specific rulemaking
    petition by July
    1,
    1989; applying for any construction permits
    by December 31,
    1990; and completing installation by December
    31,
    1991.
    This variance will expire on December
    29,
    1993.
    On June
    30, 1989 NSC and CIWC filed a motion requesting the
    Board to accept the subject petition for either an adjusted
    standard or a site—specific rulemaking.
    On July 26,
    1989 the
    Agency filed
    a response declining to take a substantive position
    on the advisability of the adjusted standard form of
    relief.
    On
    July 27, 1989, the Board granted the request to allow
    the matter
    to move forward as an adjusted standard proceeding.
    On August
    29,
    1989,
    the Agency filed a response, which raised various
    issues but did not make a recommendation on the requested
    relief.
    On January 3,
    1990 an amended petition was filed.
    Hearing was held on March
    28, 1990.
    On April
    30,
    1990, NSC and
    CIWC filed final comments and corrections
    to the transcript
    of
    hearing.
    The Agency filed its final comments on May
    2,
    1990,
    in
    large measure supporting the requested relief.
    On December
    18,
    1990 NSC and CIWC filed for an extension of
    the date to apply for construction permits
    in PCB 88—84.
    On
    December
    20,
    1990,
    the Board granted that modification of the
    internal deadline
    in the variance, extending the date to apply
    for construction permits until May 9,
    1991.
    NCS anticipates that
    if, after
    the Board’s decision
    in this adjusted standard
    proceeding, construction should be required,
    that construction
    could be completed consistent with the variance deadline
    of
    December
    31, 1991.
    Background
    NSC’s facility
    is located
    in University Park,
    Will County,
    Illinois.
    It was acquired by NSC in 1982 and employs over
    200
    people with an average payroll
    of over
    $7 million.
    The facility
    manufactures aspartame,
    a low—calorie sweetener, marketed as
    “NutraSweet”.
    The manufacturing process involves
    the chemical
    reaction of two amino acids and purification of the product.
    The
    process requires the use of inorganic acids and organic
    anhydrides and neutralization by caustic soda.
    Wastewaters are
    created, which are high
    in TDS and which are pretreated by NSC
    prior
    to discharge to the treatment plant of CIWC.
    CIWC is a
    privately owned utility company situated on Deer Creek, which
    also supplies water and sewer services to the Village of
    University Park.
    NSC maintains a 460,000 gallon equalization basin for
    treatment of boiler blow—down,
    condenser cooling water,
    soft
    lit’

    —3—
    water regeneration, and backwash.
    Boiler
    blow—down and
    regeneration backwash from Zeolite water softening are the
    primary sources of the TDS discharge.
    The major constituents of
    the TDS are sulfates, which arise naturally from raw water usage;
    chloride, which results from the raw water and from water
    softening by NSC; calcium; magnesium; and sodium.
    Under the variance granted in PCB 88-84,
    the TDS
    concentration of CIWC’s discharge to Deer Creek may not exceed
    2,100 milligrams per liter
    (“mg/i”) as a daily composite and
    1,675 rag/i as a monthly average.
    NSC’s TDS discharge
    to CIWC may
    not exceed 11,100 kilograms per day
    (“kg/day”)
    as a daily
    composite and 6,000 kg/day as
    a monthly average.
    NSC’s average discharge flow to CIWC during 1988 was 0.124
    MGD (0.317 MGD maximum).
    This includes an average of
    approximately 4,473 kg/day of TDS
    (11,785 kg/day maximum).
    Petitioners have indicated that
    for the period from January 22,
    1988
    to June
    25,
    1988,
    the water quality standard of
    1,000 mg/i
    for TDS
    (found at 35
    Ill. Adm. Code 302.208) was exceeded on 11
    separate occasions at Gage #4,
    a point approximately 1.3 miles
    downstream of CIWC’s point of discharge.
    Pet.,
    Exhibit
    E; Ag.
    Response, p.3
    (August
    29,
    1989).
    On each of those 11 dates,
    background TDS levels at Gage #1, 1000 feet upstream of CIWC’s
    discharge, were below the regulatory standard.
    For 1988 the
    average TDS level at Gage
    #4 was 1200 mg/i,
    which would fall
    below the level permitted under the Board’s variance.
    In 1989 TDS discharge from NSC to CIWC averaged
    approximately 10,408 pounds per day
    (“ppd”), with a maximum of
    25,382 ppd.
    Additionally, NSC hauls over 15,000 gallons per day
    of high TDS wastes off—site for disposal.
    NSC’s discharges and pretreatment
    in the equalization basin
    are governed by Permit No.
    1988—EP—l686, which the Agency issued
    on December
    30,
    1988.
    The permits contains terms and conditions
    regarding load limits and monitoring
    requirements based on the
    variance granted by the Board in PCB 88-84 on December 15,
    1988.
    Those conditions would remain in effect through December
    29,
    1993,
    the date on which NSC’s permit expires.
    Ag. Final
    Comments, p.1
    (May 2, 1990).
    The affected receiving stream is Deer Creek, which has been
    characterized in the record as an intermittent stream with a
    7—
    day, 10—year low flow of
    0 cubic
    feet per second.
    (7010=0).
    Agency Response,
    p.5, Aug.
    29,
    1989.
    The discharge from CIWC
    enters Deer
    Creek approximately 14 miles upstream of its
    confluence with Thorne Creek.
    Pet. at p.2.
    The affected stretch
    of water
    is estimated to be approximately 15 miles
    in length.
    Transcript
    (“Tr.”)
    at pp.
    25—27.
    Deer Creek
    is more fully
    described as follows:
    Above the plant Deer Creek
    is an intermittent
    stream;
    below
    it
    is perennial.
    It meanders
    east and north through suburban areas of Will
    and Cook Counties.
    At
    the Lincolnshire Golf
    119—107

    —4—
    Course
    it is dammed
    to form a shallow, 18—acre
    lake called Deer Lake.
    About
    14 miles
    downstream from the CIWC discharge Deer Creek
    joins Thorne Creek,
    a tributary of the Little
    Calumet River.
    Deer Creek
    is a low gradient
    stream, dropping only a small distance for each
    mile of stream length.
    It has been channelized
    for short distances near East Chicago Heights.
    Pet.
    at p.8, Ag. Response, p.4
    (August
    29,
    1989)
    Additionally, the stream has been characterized as
    follows:
    “a poor quality stream and the biota are very tolerant
    organisms”.
    Tr.
    at pp.
    87—90.
    Testimony of Michael Ander,
    Senior Ecologist, Dames
    & Moore, Park Ridge,
    Illinois.
    See also
    testimony attached to transcript as Exhibit
    2.
    Regulatory Framework
    The Board’s authority to grant an adjusted standard
    is found
    in Section 28.1 of the Act.
    Section 28.1(a) provides that the
    Board may grant such relief
    if the adjusted standard
    is
    consistent with the site—specific rulemaking provisions of
    Section 27(a).
    Thus,
    the Board
    is to consider the technical
    feasibility and economic reasonableness of measuring or reducing
    the particular pollution.
    Under Section 27(a)
    the Board is also
    to “take into account the existing physical conditions,
    the
    character of the area involved, including the character of
    surrounding land uses,
    zoning classifications, the nature of the
    existing air quality, or receiving body of water.”
    Section
    28.1(b) authorizes the Board
    to specify within a rule of general
    applicability the level of justification necessary to support the
    grant of an adjusted standard.
    Since the Board’s water
    regulations do not so specify,
    Section 28.1(c)
    is applicable to
    the petition here.
    That Section further describes the
    petitioner’s burden of proof as follows:
    c.
    If a regulation of general applicability
    does not specify
    a level of
    justification required of a petitioner
    to qualify for an adjusted standard,
    the
    Board may grant individual adjusted
    standards whenever
    the Board determines,
    upon adequate proof by petitioner,
    that:
    1.
    factors
    relating to that petitioner are
    substantially and significantly
    different
    from the factors
    relied upon
    by the Board
    in adopting the general
    regulation applicable to that
    petitioner;
    2.
    the existence of
    those factors
    justifies
    an adjusted standard;
    119—108

    —5—
    3.
    the requested standard will not result
    in environmental or health effects
    substantially and significantly more
    adverse than the effects considered by
    the Board in adopting the rule of
    general applicability; and
    4.
    the adjusted standard
    is consistent with
    any applicable federal law.
    Section 28.1(c) of the Act.
    The Board’s procedural rules at
    35
    Ill. Adm. Code 106.701 et
    seq. also provide specific rules
    for the adjusted standard
    proceeding.
    Proposed Adjusted Standard
    Petitioners request an adjusted standard from both Section
    304.105 and Section 302.208 consistent with the variance granted
    in PCB 88—84.
    NSC requests an adjusted standard for TDS from
    Section 304.105 to allow
    a maximum discharge limit of 11,100
    kg/day and 6,000 kg/day as
    a monthly average.
    CIWC requests an
    adjusted standard for TDS to allow a maximum daily discharge of
    2,100 mg/i and 1,675 mg/l
    as
    a monthly average.
    Petitioners also
    seek an adjusted standard from the TDS water quality standard
    in
    Section 302.208
    (1,000 mg/i).
    Petitioners request that the
    adjusted standard be established at 2,100 mg/i to reflect CIWC’s
    requested effluent standard, since the current water quality
    standard must be the same as CIWC’s maximum daily effluent limit
    because Deer Creek has a “7QlO” of
    zero.
    NSC also requests that the load limits and monitoring
    continue to be imposed through the permitting process and not as
    part of the adjusted standard.
    Agency Recommendation
    At hearing the Agency expressed its support for the grant of
    the adjusted standard.
    Tr.
    at pp.
    10—11.
    Additionally,
    in its
    Final Comments filed May
    2,
    1990,
    the Agency agreed with the
    Petitioners that the monitoring requirements and limits on the
    flows from NSC could be imposed pursuant
    to permit conditions,
    but the Board must condition relief on reopening the permit to
    reflect the terms and conditions
    of the adjusted standard.
    The
    Agency also stated that federal review necessitates fashioning
    relief from the water quality standard of Section 302.208 to
    avoid a federally impermissible de facto
    revision of
    the water
    quality standard.
    See Ag. Response, pp.
    57 August
    29,
    1989,
    citing the Mobil
    Oil, John Deere,
    and Marathon Petroleum cases;
    see also Borden Chemicals,
    R86—l4, Opinion and Order,
    November
    29,
    1990.
    119-109

    —6—
    At hearing Dean Studer, an environmental protection engineer
    with the Agency referred to Mr. Ander’s testimony in stating that
    the requested 2100 mg/i TDS standard is below the 3000 mg/i TDS
    level necessary for the protection of aquatic life
    in the
    affected stream.
    Mr. Studer indicated that the proper approach
    would be for the Board to grant an adjusted standard, subject to
    conditions specified by the Agency,
    from the TDS standard of
    35
    Ill. Adm. Code 302.208.
    Mr. Studer states that a 2100 mg/i TDS
    water quality standard and daily maximum effluent limitation and
    1675 mg/i monthly effluent limitation should be easily attainable
    by CIWC, and these were approved by the Board in the variance
    case
    in PCB 88—84.
    However, he also stated that although
    instream monitoring requirements for CIWC should no longer be
    necessary,
    the Agency may require through the NPDES permit
    process that the monitoring frequency for CIWC be increased from
    the currently required
    3 times/week on a composite basis to
    5
    times/week.
    Tr.
    at pp.
    97—98.
    The Agency’s chief concern is
    that the fairly rapid fluctuations
    in the TDS concentrations in
    NSC’s wastestream may cause problems
    in CIWC’s treatment
    process.
    In particular,
    “spikes” in TDS concentrations may pass
    through CIWC and be discharged to waters of the State.
    Continued
    monitoring of TDS by NSC may alleviate this problem by
    identifying the cause of the unusual fluctuation
    in TDS levels.
    Tr. at p.98.
    Technical Feasibility and Economic Reasonableness
    At hearing Mr. Andrew
    J.
    Quick, Manager
    of Environmental
    Engineering for NSC testified regarding the effectiveness and
    cost of several compliance alternatives investigated by NSC.
    He
    discussed the findings of two studies conducted
    in 1985 and 1986
    by Environmental Resource Management
    (“ERM”), attached as
    Exhibits F and G to the petition.
    In the first study,
    ERM concluded that to achieve compliance
    NSC would need to use electrodialysis or
    ion exchange,
    requiring
    NSC to pretreat
    its entire effluent for inorganics removal.
    The
    pretreatment would include:
    1) equalization and neutralization;
    2)
    nutrient supplementation and aerobic biological treatment;
    3)
    gravity clarification and
    filtration;
    and 4) dissolved air
    floatation,
    aerobic digestion and belt filtration.
    This would
    involve major expenditures, with capital costs for pretreatment
    alone of nearly
    2 million dollars and with annual costs of
    approximately $500,000.
    ERM considered other options and found
    evaporation-crystalization and hauling for disposal would be the
    most cost—effective option.
    In the second study,
    ERM analyzed eight treatment
    alternatives to minimize NSC’s overall wastewater treatment and
    disposal costs and for NSC to pretreat its wastes or for CIWC to
    expand
    its plant capabilities.
    These alternatives included
    varying requirements for expansion of the CIWC treatment plant,
    for pretreatment facilities owned by CIWC, and for pretreatment
    facilities owned
    by NSC.
    The capital cost of the preferred option recommended by ERM
    119—110

    —7—
    would be nearly 3.4 million dollars with total annual costs
    in
    excess of
    4 million dollars.
    Other options involved costs as
    high as
    6 million dollars per year.
    A follow—up pilot plant study of the option recommended by
    ERM
    found
    that capital costs,
    in 1986 dollars, would be 3.5
    million dollars and annual operating expenses would be 1.65
    million dollars.
    On the basis that the costs to comply were
    unreasonable,
    ERM
    recommended that NSC seek site—specific
    relief.
    Tr.
    at pp.
    23—26, and Tr. Exhibit
    1.
    The Agency also pointed out that although the NSC reports
    indicate that four technologies are available
    to achieve
    compliance with the water quality standards for TDS, each method
    produces a wastestream with another disposal problem.
    The Agency
    notes that reverse osmosis,
    eiectrodialysis,
    ion exchange, and
    vapor compression evaporation each generate a highly concentrated
    brine solution requiring disposal.
    Additionally,
    the first three
    methods involve extensive pretreatment due to the concentrations
    of organics and solvents
    in NSC’s discharge, and membranes
    utilized in these three processes are easily fouled by organic
    chemicals.
    The Agency also noted
    the significant costs
    related
    to these compliance alternatives.
    Ag. Response, pp.
    9—10
    (August
    29, 1989)
    Environmental Impact
    As an initial matter,
    Mr.
    Quick of NSC testified that “(t)he
    TDS discharges from NSC
    to CIWC have never caused any upset
    to
    CIWC’s biological treatment process.
    Further, since NSC’s
    discharges
    in accordance with the requested adjusted standard
    will remain at
    or near present levels,
    there
    is
    no significant
    potential for future upsets.”
    Tr.
    at p.21.
    (emphasis added).
    See also testimony of Dennis Conwell of CIWC,
    Tr.
    at pp.63-64.
    Mr. Quick also testified that NSC’s discharges have never caused
    CIWC to exceed 2100 milligrams per liter
    in their discharge of
    TDS to Deer Creek.
    Tr.
    at p.35.
    This
    is a key consideration in
    the Board’s evaluation of the environmental
    impact of CIWC’s
    discharge to Deer Creek as the Board’s decision is premised on
    future discharges essentially duplicating historical information.
    Michael Andres,
    Senior Ecologist with Dames
    & Moore, Park
    Ridge,
    Illinois, testified on behalf of NSC and CIWC that the
    proposed adjusted standard would involve minimal environmental
    impact on Deer Creek.
    He testified as follows:
    My
    involvement with this matter began when
    NSC and CIWC,
    in connection with their original
    variance petition,
    asked Dames
    & Moore
    to
    conduct various stream studies on the Deer
    Creek area.
    After these studies were
    completed, we found
    that TDS levels
    in Deer
    Creek
    could exceed 3,000
    mc1’?, without causing
    undue stress
    to
    the aquatic life.
    The effluent
    and water quality data presented
    in NSC’s and
    119—111

    —8—
    CIWC’s current Petition for Adjusted Standards
    clearly demonstrated that the TDS levels
    in
    Deer Creek are far below
    that level.
    Therefore,
    it
    is our opinion that the requested
    adjusted standards will not have adverse
    environmental effects upon aquatic life in the
    affected stream reach.
    Dames
    & Moore has also investigated the
    potential
    impact of elevated TDS levels on
    irrigation and shallow wells near Deer Creek.
    ...we found that the induced recharge from Deer
    Creek and the resultant increase in TDS levels
    would have only a minor impact on the overall
    water quality in the regional aquifer.
    Moreover, that impact
    is well within the
    natural range of variabiiity...At NSC’s
    request, Dames
    & Moore recently reexamined this
    1986 report, and confirmed these conclusions.
    I have reviewed a water quality study
    prepared by Alpha Consultants,
    Ltd., dated
    October
    17, 1986,...which
    is Attachment
    L to
    the petition.
    Of particular note are Alpha’s
    findings that the TDS, chloride and sulfate
    mass loadings from NSC
    to the CIWC treatment
    plant were well within the variance limits, and
    the concentrations of those constituents
    in
    Deer Creek are well within the historical
    range
    of concentrations recorded since the early
    1970’s.
    Given these facts,
    I agree with Alpha
    Consultants’ recommendation that the current
    environmental impact on Deer Creek water
    quality from NutraSweet operation is
    insignificant, and does not justify major
    capital expenditure...
    ...Dames
    & Moore conducted a field
    investigation of irrigation practices using
    water
    from Jeer Creek...which
    is Attachment
    K
    to the petition...only two parcels of land were
    found to have been irrigated during 1983 and
    1984.
    Moreover, on neither parcel did
    irrigation occur on more than 15 days per
    year.
    No one reported any problems...
    This irrigation investigation was updated
    in a follow—up study...in November 1989.
    That
    study
    is Attachment P to the petition.
    At that
    time,
    no agricultural land
    in the Deer Creek
    area was
    being irrigated with Deer Creek
    water...We specifically found that, based on
    water balance calculations, Deer Creek meets
    water quality requirements for supplemental
    irrigation
    to sustain crop yield potential.
    119—112

    —9—
    ***
    (B)ased upon the potential use of Deer
    Creek
    for supplemental irrigation water, there
    will be no adverse impact on crops
    if the
    adjusted standards requested by NSC and CIWC
    are granted.
    As part of its November 1989 investigation
    on TDS levels
    in Deer Creek, Dames
    & Moore
    conducted a study
    to determine the stream reach
    which may be subject
    to excursions
    of the 1000
    mg/l TDS water quality standard if CIWC is
    allowed to continue discharging at present
    levels...
    Based on this effort, the TDS load due
    to
    the CIWC discharge was predicted to be
    insignificant at
    the Thorne Creek USGS gaging
    station,
    15 miles downstream of CIWC’s
    discharge.
    ...NSC and CIWC do not significantly
    contribute to any exceedances of the 1,000 mg/i
    TDS standard downstream of the USGS gaging
    station on Thorne Creek.
    Mr. Ander summarized his conclusions with the following
    statements:
    I do not believe that the granting of this
    adjusted standard will impair any present or
    potential beneficial use
    of Deer Creek
    for a
    number of reasons.
    One reason is
    that the raw
    water supplied to NSC from CIWC contains high
    concentrations of TDS
    (800—1,000 mg/i)
    which
    are naturally occurring pollutants.
    Second,
    Deer Creek
    is an intermittent stream above the
    CIWC treatment plant.
    Without the effluent
    volume entering the stream,
    Deer Creek would
    probably be intermittent for most of its
    length.
    The effluent water,
    therefore,
    provides the necessary streamfiow to keep Deer
    Creek flowing year round and to provide the
    habitat that
    is available.
    Finally,
    Deer Creek
    is a very small stream, and as such,
    the
    diversity of potential uses
    is limited due
    to
    the limited amount of water and habitat
    available.
    Deer Creek
    is naturally
    intermittent for much of its length,
    and much
    119—113

    —10—
    of the biota
    is present by virtue of the
    discharge from the CIWC plant maintaining flows
    in the Creek.
    (T)here will be little or no adverse
    environmental and health impact from NSC’s and
    CIWC’s discharges if the Board grants
    the
    requested adjusted standards.
    Further, the
    Board’s granting of the relief requested will
    not impair any present or potential beneficial
    uses of the applicable stream segment.
    Tr. Exhibit
    2.
    Consistency with Federal Law
    The Agency has stated that the Clean Water Act,
    33 U.S.C.
    1251 et
    seq.,
    and federal regulations at
    40 CFR 131.3 require
    that the water quality standard for TDS for
    the affected water be
    changed.
    In such
    a circumstance federal review is required
    pursuant to Section 303(c) of the Clean Water Act and 40 CFR
    131.5.
    The Agency has contacted USEPA in connection with
    satisfying federal requirements
    of the Clean Water Act and
    40 CFR
    131.
    See Agency Motion of August
    8,
    1989.
    See also Agency
    Response of August
    29,
    1989 at pp. 8—9.
    The Agency asserts that
    if relief
    is to be granted,
    federal regulations require the Board
    to adjust the water quality standard and not merely grant relief
    from 35
    Ill.
    Adm. Code 304.105.
    At hearing the Agency indicated that a response from USEPA
    has not been received,
    but that federal approval will require
    1)
    a water quality standard, protective of stream uses and
    2)
    a TDS
    effluent standard to be imposed upon CIWC.
    Petitioners have indicated that relief may be granted
    consistent with federal law.
    The Board finds
    that the Agency and
    the Petitioners have provided an adequate basis for the Board’s
    concluding that the adjusted standard may be granted consistent
    with federal
    law.
    Conclusion
    Based on the information before
    it, the Board finds
    that
    NSC and CIWC have provided adequate proof of economic
    unreasonableness, technical infeasibility, negligible
    environmental impact and the factors found in Section 28.l(c)1—4
    of the Act
    to support
    the conclusion
    that the water quality
    standard for TDS found at
    35
    Ill. Adm. Code 302.208 should be
    adjusted for the receiving stream and that an adjusted standard
    from 35
    Ill. Adm. Code 304.105 should be granted to allow an
    effluent discharge of up to 2100 mg/I of TDS.
    This Opinion constitutes the Board’s findings
    of fact and
    119—114

    —ii—
    conclusions of law in this matter.
    ORDER
    Pursuant to the authority of Section 28.1 of the
    En.vironmental Protection Act,
    the Board hereby adopts the
    following adjusted standard.
    This standard becomes effective on
    the date of this order.
    1)
    The water quality standard for total dissolved solids
    shall be 2,100 mg/i
    for that portion of Deer Creek between the
    point
    of discharge from the facility of Consumers Illinois Water
    Company
    in University Park,
    Illinois and the confluence of Deer
    Creek with Thorne Creek, and for that portion of Thorne Creek
    between the confluence of Thorne Creek with Deer Creek and the
    USGS gaging station located on Thorne Creek approximately fifteen
    miles downstream of the point
    of discharge from the above—
    mentioned facility.
    The water quality standard for total
    dissolved solids found at
    35 Ill. Adm. Code 302.208 shall not
    apply.
    2)
    The requirements
    of
    35
    Iii. Mm. Code 304.105,
    as that
    section relates
    to the water quality standard for total dissolved
    solids of
    35
    Ill.
    Adrn.
    Code 302.208,
    shall not apply to the
    effluent discharges from the facilities of Consumers Illinois
    Water Company and The Nutrasweet Company located in University
    Park, Illinois,
    so long as the total dissolved solids
    concentration in the effluent discharges from Consumers Illinois
    Water Company does not exceed a maximum daily composite
    concentration of 2,100 mg/i and a monthly average composite
    concentration of 1,675 mg/i and the discharge from The Nutrasweet
    Company to Consumers Illinois Water Company does not exceed
    11,100 kg/day as a maximum daily composite and 6,000 kg/day as a
    monthly average.
    3)
    The above adjusted standards granted to Consumers
    Illinois Water Company and The Nutrasweet Company shall be
    conditioned upon the revision of the Petitioners’ National
    pollutant Discharge Elimination System
    (“NPDES”) permits
    consistent with these adjusted standards,
    including such load
    limits and monitoring requirements as proposed by the Agency in
    this proceeding.
    Consumers Illinois Water Company and The
    NutraSweet Company shall perform all monitoring
    requirments
    for
    the discharge of total dissolved solids and monitoring of the
    water quality in Deer Creek and Thorne Creek
    as may be required
    pursuant to their NPDES permits.
    Section 41 of the Illinois Environmental Protection Act,
    Ill.
    Rev.
    Stat.
    1989,
    ch.
    ill 1/2
    ,
    par.
    1041, provides for
    appeal of final orders of the Board within
    35 days.
    The Rules
    of
    the Supreme Court of Illinois establish filing requirements.
    IT IS SO ORDERED.
    119—115

    —12—
    I, Dorothy M.
    Gunn, Clerk of the Illinois Pollution Control
    Board, hereby certify that the above Opinion and Order was
    adopted on the ~T~(-day of _______________________,
    1991,
    by a
    vote of ~O
    .
    Dorothy M~-/Gunn, ierk
    Illinois pollution Control Board
    119—116

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