ILLINOIS POLLUTION CONTROL BOARD
    August
    13,
    1971
    ENVIRONMENTAL PROTECTION AGENCY
    v.
    )
    #
    PCB
    71—28
    DANVILLE SANITARY DISTRICT
    Supplemental Opinion
    & Order of the Board
    (by Mr. Currie):
    Our May
    26 order forbade new connections to the Danville
    Sanitary District until measures were taken
    to reduce effluent
    suspended solids to
    a monthly average of 50 mg/i and BOD to
    20 mg/l.
    The District has taken the prescribed
    steps.
    From
    July
    1 to August 10 suspended solids averaged
    24 mg/l;
    from July
    15 through August
    4 BOD as measured by an expert consulting
    firm averaged
    23 mg/i.
    These concentrations compare very favor-
    ably with average BOD levels
    of 92 and suspended solids
    of 151
    before corrective steps were
    taken.
    The present suspended
    solids
    level is much better than required by
    the order; the BOD level
    is in the right ballpark and
    so close
    to the required level as
    in substance
    to comply.
    We believe the intent of our order has been met, especially
    since the initial figures were
    set on the basis of a prediction
    from laboratory tests as to the efficiency of the process.
    We
    commend the District for its prompt and effective
    action and we
    hold,
    in the light of additional information not available
    at
    the time of our
    order, that the District is
    in substantial
    compliance with the effluent requirements of our order.
    The District testified that new sources approximating
    1500 P,E. will need connection in the next
    10-12 months and that
    this quantity can be added,
    both organically and hydraulically,
    without jeopardizing the maintenance of present effluent levels.
    We therefore allow the connection
    of new waste sources aggregating
    not
    in excess of that quantity, except that further connections
    shall cease if the monthly average BOD exceeds 30 mg/i or suspended
    solids 25 mg/l,
    We cannot lift the ban altogether because too
    many additions would cause another overload.
    In all other
    respects
    the May
    26 order remains
    in effect.
    The District shall
    file
    a report three months from this date indicating what
    2
    —
    275
    additional connections
    have been made and what effluent con-
    centrations have been achieved.
    At that point the Board will
    reexamine the sewer ban auestion in the light of the then
    situation.
    I, Regina
    E.
    Ryan, Clerk of the Pollution Control Board,
    certify that the Board ~
    the ab~upplemental
    2
    —
    276

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