ILLINOIS POLLUTION CONTROL
    BOARD
    October 10,
    1991
    SHELL OIL COMPANY,
    )
    Petitioner,
    PCB 88—188
    v.
    )
    (Variance)
    ILLINOIS ENVIRONMENTAL
    )
    PROTECTION AGENCY,
    )
    Respondent.
    ORDER OF THE BOARD
    (by J.D. Dumelle):
    This
    matter
    is
    before
    the
    Board
    on
    Shell
    Oil
    Company’s
    (“Shell”)
    September
    18,
    1991
    motion
    to
    modify
    its
    variance
    compliance plan.
    On November 29,
    1990 this Board granted Shell’s
    Wood River Manufacturing Company (“WRNC”)
    a variance from 35
    Ill.
    Adin.
    Code section 901.102(a)
    and 901.103.
    Shell submits that it
    is committed to achieving noise reduction by the date set out
    in
    the variance (December 21,
    1991), but that as work has progressed
    on
    its compliance
    plan,
    Shell
    has
    discovered that
    a
    technical
    modification
    will
    be
    necessary.
    Accordingly,
    Shell
    seeks
    to
    substitute technically equivalent noise abatement measures pursuant
    to 35
    Ill. Adm. Code Sections 101.241 and 101.301(b).
    Specifically,
    Shell
    proposes
    to
    alter
    the
    commitments
    of
    project number two found on page
    6 of our November 29,
    1990 Order.
    The company will restore the forced draft fan system to operation
    at the CR-3 unit in order to allow the natural draft plenums to be
    closed.
    This will silence the secondary burner noise at each of
    the connected CR—3 process heaters.
    Shell will leave the rest of
    the preheat system,
    including the indirect draft
    fan,
    idle.
    The
    company maintains that this alternative will provide a lower sound
    level
    from
    the
    CR-3
    unit
    than
    the
    compliance
    plan
    originally
    proposed and
    adopted by this
    Board
    because
    the
    dominant
    noise
    generating unit will remain off—line.
    Shell
    suggests
    that
    this
    language
    be
    adopted
    in
    lieu
    of
    project number two found on page 6 of the Board’s November 29, 1990
    order:
    NOISE SOURCE
    NOISE ABATEMENT
    ID Fan
    Install outlet duct silencer, replace fan,
    replace seals
    on the air preheater;
    or,
    in the alternative,
    leave the fan idle.
    H-2 Burners
    Restore air preheat system forced draft
    (FD)
    fan to operation.
    H-4 Burners
    Restore air preheat system forced draft
    (FD)
    fan to operation.
    126—42 1
    H—5 Burners
    Restore air preheat system
    forced
    draft
    (FD)
    fan to operation.
    H-6 Burners
    Restore air preheat system forced
    draft
    (FD)
    fan to operation.
    When
    Shell
    filed
    this
    motion
    on
    September
    17,
    1991,
    the
    company
    requested
    that the motion
    not be
    considered
    until
    our
    October
    10,
    1991
    meeting
    in
    order
    to
    give
    the
    Illinois
    Environmental Protection Agency (“Agency”) adequate time to analyze
    the proposed alternatives
    and respond accordingly.
    Although the
    Agency
    has
    not
    responded,
    Shell
    filed
    a
    motion
    and
    affidavit
    stating’ that
    the
    Agency
    had
    no
    objection
    to
    the
    variance
    modification.
    Accordingly, this motion is granted.
    IT IS SO ORDERED.
    I,
    Dorothy M.
    Gunn,
    Clerk of the Illinois Pollution Control
    Board hereby certify t~a~~he
    above Order was adopted on the
    ~
    day of
    ________________,
    1991 by a vote of
    7~
    I
    llut
    Control Board
    126—422

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