ILLINOIS POLLUTION CONTROL BOARD
    December 18, 1997
    OWENS OIL COMPANY,
    Petitioner,
    v.
    ILLINOIS ENVIRONMENTAL
    PROTECTION AGENCY,
    Respondent.
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    PCB 98-32
    (UST - Reimbursement)
    MR. FRED C. PRILLAMAN AND MS. BECKY S. McCRAY OF MOHAN, ALEWELT,
    PRILLAMAN & ADAMI APPEARED ON BEHALF OF PETITIONER;
    MR. JOHN. J. KIM AND MS. VALERIE A. PUCCINI APPEARED ON BEHALF OF
    RESPONDENT.
    OPINION AND ORDER OF THE BOARD (by R.C. Flemal):
    This matter is before the Board on a petition filed by Owens Oil Company (Owens) on
    August 25, 1997, for review of an Illinois Environmental Protection Agency (Agency)
    underground storage tank fund reimbursement determination. Owens filed this petition to
    appeal the July 18, 1997, Agency final determination which disallowed $6,900 in corrective
    action costs.
    The Board herein finds that the Agency acted arbitrarily in disallowing the corrective
    action costs at issue. We accordingly reverse the Agency’s determination and direct that
    reimbursement be made.
    BACKGROUND
    Owens is the owner of a gasoline service station located at 401 Main Street, Greenfield,
    Greene County, Illinois, known as Facility No. 0610155002. In 1989, Owens notified the
    Illinois Emergency Management Agency (IEMA) that there was a release of petroleum from
    an underground storage tank (UST) at the Owens site. IEMA assigned the release as Incident
    No. 892647.
    In 1994, Owens contracted with the consulting firm, CW
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    M, to remediate the site. The
    corrective action plan included source removal, trench installation, and groundwater recovery
    and treatment. Specifically regarding the groundwater treatment, CW
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    M built a groundwater
    treatment plant, operational for three years, and leased it to Owens. The lease was an oral
    agreement at a rate of $3,500/month. In 1996 Owens filed three reimbursement applications

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    (covering nine months of treatment) for corrective action costs with the Agency, all of which
    included requests for the $3,500/month lease. The Agency fully reimbursed Owens for each
    of the $3,500/month costs.
    Owens filed the instant claim for reimbursement on or about May 1, 1997. The
    application requested reimbursement of correction action costs in the amount of $17,635.94,
    which included an additional three months of lease of the groundwater treatment plant. Pet. at
    2. On July 18, 1997, the Agency issued its final determination and found Owens eligible for
    $10,735.94 in reimbursement costs. The reimbursement included all items except for $6,900
    of the $10,500 requested for lease of the groundwater treatment plant. The Agency explained
    the denial as: “$6,900.00, deduction in costs with the Monthly Mobil Groundwater Lease that
    the owner/operator failed to demonstrate were reasonable. (Section 22.18b(d)(4)(C) of the
    Illinois Environmental Protection Act.).” Joint Exh. 1 at 003.
    DISCUSSION
    We find that the controlling issue in this case is that, having previously determined the
    $3,500/month lease rate to be reasonable, it was arbitrary for the Agency, without some
    indication greater than here present, to reverse that previous determination.
    An administrative agency is “bound by prior custom and practice in interpreting . . .
    rules and may not arbitrarily disregard them.” Alton Packaging Corp. v. PCB and IEPA, 146
    Ill. App. 3d 1090, 497 N.E. 2d 864, 866 (5th Dist. 1987). When an agency departs from its
    prior practice, it accordingly must be for good cause, such as change in law, determination
    that the facts of the new matter are different from those upon the prior practice was based, or
    determination that the prior practice was in error (see, e.g., Chuck and Dan’s Auto Service v.
    IEPA, (August 26, 1993) PCB 92-203 and Chemrex, Inc., v. IEPA, (February 4, 1993), PCB
    92-123). No such cause is present here.
    There was no change in the applicable law over the period at issue. Moreover, it is
    uncontested that the facts presented to the Agency were the same in the four applications at
    issue. Owens submitted the same application for reimbursement on four occasions. All
    applications involved the same site, the same monthly groundwater treatment lease, the same
    parties, and the same remediation plan. Joint Exh. 1 at 023, 052, and 088.
    The Agency does contend that at the time of review of the fourth application it had
    reason to believe that the $3,500/month lease rate was excessive. This contention is based on
    a reported conversation held between Mr. Christopher Kohrmann, who was the Agency’s
    project manager for the fourth application
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    , and Mr. Brian Bauer, another Agency project
    manager. Tr. at 22-24. According to Kohrmann, Bauer told him that he had obtained from a
    vender a quoted lease rate of $1,200/month for a similar treatment system. Tr. at 24.
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    The project manager for the first three applications was a different individual, Mr. Robert
    Mathis.

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    This alleged quoted rate is the sole basis used by the Agency in determining to
    reimburse the fourth application at the reduced $1,200/month rate. Tr. at 27. The decision as
    well was solely Kohrmann’s. Tr. at 33.
    On examination, however, Mr. Kohrmann testified that he was not a party to the phone
    conservation in which the alleged $1,200 rate was given. Tr. at 24. Moreover, he did not
    know the vendor’s name, when the quote was given, what the terms of the quote where,
    whether the treatment plant was the same as used by Owens, or whether there was any follow-
    up to determine that the $1,200/month rate was reasonable. Tr. at 25-27. Similarly,
    Kohrmann testified that he did not consult the Agency’s job performance guidance (Pet. Exh.
    6) of April 1, 1996 (Tr. at 33), the Agency’s LUST Project Manager’s Handbook (Tr. at 33),
    or any Agency rule (Tr. at 34) for any additional guidance. Neither did Kohrmann review any
    of the three prior Owens’ applications (Tr. at 33) or the files of any reimbursements
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    made for
    other UST sites at which leases of groundwater treatment plants were involved (Tr. at 37).
    We find this minimal investigation scanty basis for the Agency to reverse its prior
    determinations regarding the reasonableness of the $3,500/month lease rate. While we agree
    with the Agency that there is no explicit requirement upon it to consult any specific documents
    or conduct any specific investigation of its own (see Agency brief at 16-18), we disagree that
    this constitutes license for the Agency to reverse itself without more foundation than is here
    present. Some modicum of evidence must exist, else the decision is arbitrary. We find that
    that modicum does not exist here.
    This opinion constitutes the Board's findings of fact and conclusions of law in this
    matter.
    ORDER
    The July 18, 1997, determination of the Illinois Environmental Protection Agency to
    disallow $6,900 in reimbursement of corrective action costs to Owens Oil Company is hereby
    reversed. The Board directs the Agency to reimburse Owens Oil Company, in the amount
    disallowed, according to standard reimbursement procedures.
    IT IS SO ORDERED.
    Section 41 of the Environmental Protection Act (415 ILCS 5/41 (1996)) provides for
    the appeal of final Board orders to the Illinois Appellate Court within 35 days of service of this
    order. Illinois Supreme Court Rule 335 establishes such filing requirements. See 145 Ill. 2d
    R. 335; see also 35 Ill. Adm. Code 101.246, Motions for Reconsideration.
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    At hearing Owens showed, based on the Agency’s own records for sites other than the
    Owens’ site, that reimbursement for similar groundwater treatment plant leases had been at the
    $3,500/month rate.

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    I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, hereby certify that
    the above opinion and order was adopted on the 18th day of December 1997, by a vote of 7-0.
    Dorothy M. Gunn, Clerk
    Illinois Pollution Control Board

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