ILLINOIS POLLUTION CONTROL BOARD
    August
    4,
    1988
    ILLINOIS POWER COMPANY
    CLINTON POWER STATION,
    )
    Petitioner,
    v.
    )
    PCB 88—118
    ILLINOIS ENVIRONMENTAL
    )
    PROTECTION AGENCY,
    )
    Respondent.
    OPINION AND ORDER OF TUE BOARD
    (by J.D.
    Dumelle):
    This matter comes before the Board upon receipt of
    the
    August
    2,
    1988,
    provisional variance recommendation by
    Respondent,
    Illinois Environmental Protection Agency (IEPA).
    Petitioner,
    Illinois Power Co.,
    Clinton Power Station
    requests a provisional variance from the provisions of
    35 Ill.
    Adm.
    Code 302.211 and Part 303 for
    a period of
    45 days.
    Petitioner
    is also requesting
    that their l08.30F maximum
    limitation sampling point be moved
    from the end of the discharge
    flume to the edge of
    a 26 acre mixing zone.
    Petitioner owns and operates a nuclear—fuelded electrical
    generating station located
    in Clinton, Illinois.
    The station
    is
    designed
    to generate 933 net megawatts of electricity.
    The
    circulating cooling water system
    is designed
    to deliver water
    from Clinton Lake
    to the main condenser
    in sufficient quantities
    to condense the turbine exhaust system,
    the turbine bypass
    stream,
    and other
    turbine cycle
    flows.
    Petitioner’s current
    NPDES permit states that the daily average discharge temperature
    of discharges
    to Clinton Lake “shall not exceed
    99
    F during more
    than
    12 percent of the hours
    in
    a twelve—month period ending with
    any month and shall
    at no time exceed 108.3°F.
    Petitioner has indicated
    that on July
    18,
    1988 one of the
    circulating cooling pumps failed resulting
    in reduction of
    approximately 446 cfs
    (288
    MGD
    of circulating cooling water
    flow.
    This pump will remain out of service until August
    6,
    1988.
    While the pump
    is not in operation the average daily flume
    discharge temperatures will exceed 99°F.
    The Agency’s
    recommendation states that the request
    to move
    the sampling location
    to the edge of the 26 acre mixing zone
    is
    outside the scope
    of
    a request for provisional variance and
    91-169
    —2—
    should be addressed in
    a standard variance petition.
    The Board
    agrees.
    The Agency’s recommendation also states that it concurs with
    Petitioner that denial
    of the remainder
    of the requested
    provisional variance would
    impose an arbitrary and unreasonable
    hardship.
    The Agency recommends that the provisional variance be
    granted subject
    to certain conditions.
    The Board concurs.
    The Board does hereby grant the Illinois Power Company,
    Clinton Power Station
    a provisional variance from
    35
    Ill.
    Adm.
    Code 302.211 and Part 303 subject to the following conditions:
    a.
    This variance shall commence on the date of
    the Board
    Order and continue for 45 days.
    b.
    During
    the variance the 99°Faverage daily temperature
    limitation on the flume discharge be suspended such that
    if Petitioner’s effluent exceeds the 990F, during
    the
    provisional variance period,
    these days shall not be
    counted
    toward the 44—day
    limitation.
    c.
    The 108.3°Fmaximum daily average
    thermal limit shall
    still
    be applied
    at the end of the discharge flume.
    d.
    The monitoring program proposed by the Petitioner
    in
    Attachment
    4 of their provisional variance petition be
    enacted.
    e.
    The Petitioner shall also monitor water temperature
    (same frequency as condition d above) at the edge of the
    3 acre inlet just before this
    inlet water mixes with the
    main body
    of the lake.
    f.
    Within
    10 days of the date
    of the Board’s Order,
    Petitioner
    shall execute
    a Certificate of ~cceptance and
    Agreement which shall
    be sent to Mark T. Books
    at the
    address
    indicated indicated below:
    Illinois Environmental Protection Agency
    2200 Churchill road
    P.O. Box 19276
    Springfield,
    IL 62974—9276
    ATTN:
    Mark T.
    Books
    This variance shall be void if Petitioner
    fails
    to
    execute and forward the certificate within the ten day
    period.
    The ten day period shall
    be held
    in abeyance
    during any period that this matter
    is being appealed.
    The form of said Certification shall
    be as follows:
    91—170
    —3—
    CERTIFICATION
    I,
    (We), Illinois Power Company, Clinton Power Station,
    having read the Order of
    the Illinois Pollution Control Board,
    in
    PCB 88—118, dated August
    4,
    1988, understand and accept the said
    Order,
    realizing that
    such acceptance renders all terms and
    conditions thereto binding and enforceable.
    Petitioner
    By:
    Authorized Agent
    Title
    Date
    IT IS SO ORDERED.
    I, Dorothy M.
    Gunn, Clerk of the Illinois Pollution Control
    Board, hereb~ycertifythat the above Order was adopted on
    the
    ______________
    day of
    ____________,
    1988 by
    a vote
    of
    -
    .
    Dorothy M.,,-~unn,Clerk
    Illinois r~1lutionControl Board
    91—171

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