ILLINOIS POLLUTION CONTROL BOARD
    June
    23,
    1992
    COMMONWEALTH
    EDISON
    COMPANY,
    )
    (CRAWFORD GENERATING STATION)
    )
    Petitioner,
    )
    v.
    )
    PCB 91—158
    )
    (Permit Appeal)
    )
    (Consolidated)
    ILLINOIS ENVIRONMENTAL
    )
    PROTECTION AGENCY,
    )
    Respondent.
    COMMONWEALTH
    EDISON
    COMPANY,
    )
    (WEST
    CERMAK
    ROAD IN CHICAGO)
    Petitioner,
    )
    v.
    )
    PCB
    91—179
    (Permit
    Appeal)
    (Consolidated)
    ILLINOIS ENVIRONMENTAL
    P1~OTECTIONAGENCY,
    Respondent.
    ORDER OF THE BOARD
    (by G.T. Girard):
    On
    June
    16,
    1992,
    the
    parties
    filed
    a
    status
    report
    as
    directed
    by
    the
    Board’s
    order
    of
    April
    9,
    1992.
    The
    parties
    report
    that
    the
    permit
    condition
    which
    is
    the
    subject
    of
    these
    consolidated appeals concerns compliance with effluent limitations
    for
    bromine—based
    biocides
    in
    Commonwealth
    Edison’s
    condenser
    cooling water.
    At the time the permit was issued, USEPA had before
    it a chemical industry study on the toxicity of bromine biocides.
    USEPA
    has
    recently
    concluded
    its
    review
    of
    the
    study,
    which
    indicates with more precision the levels at which bromine has toxic
    effects.
    Based
    on
    the
    results
    of
    the
    study,
    the
    Agency
    and
    Commonwealth
    Edison
    are
    currently
    engaged
    in
    settlement
    discussions, and have reached agreement in principle.
    The points
    which
    remain to
    be
    finalized
    included evaluation of alternative
    cleaning mechanisms
    for
    Commonwealth
    Edison’s condensers
    and
    a
    schedule for compliance with the bromine effluent limitation to be
    placed in the company’s modified NPDES permits.
    Once
    the
    specific
    terms
    of
    Commonwealth
    Edison’s
    modified
    permits
    are
    set, the Agency will reinitiate the NPDES draft permit
    public
    comment
    and
    review
    process
    required
    by
    40
    CFR
    Part
    124.
    At
    134—323
    2
    the end of that process, the Agency expects to issue final modified
    NPDES “settlement” permits to Commonwealth Edison.
    The parties are directed to file an updated status report on
    or before September 15,
    1992.
    This updated report shall contain an
    estimated date for the conclusion of this matter.
    IT IS SO ORDERED.
    I,
    Dorothy
    N.
    Gunn,
    Clerk
    of
    the
    Illinois
    Pollution
    Control
    Board,0hereby certi7f-M that the above order was adopted on the
    ~z~~day
    of
    _________________,
    1992,
    by
    a
    vote
    of
    7~
    -/1
    ~
    1
    L
    Thorothy
    M.
    ç1nn,
    Clerk
    Illinois Pollution Control Board
    134—324

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