SITE INFORMATION AND CORRESPONDENCE FILE 1

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John Parker, -2- June 26, 2002 * It is not reasonable or necessary to conduct field-testing of multiple remedial technologies for the same media and the same hydrostratigraphic interval to evaluate the feasibility of remedial alternatives for a specific site. . All the proposed remedial technologies have been proven to remediate the constituents of concern. An initial screening of potential remedial technologies should be performed based on the site conceptual model developed for the subject site. Information collected during the site investigation concerning the geology and hydrogeology at the site, the nature and extent of the contamination and additional site specific information should be sufficient to evaluate the feasibility of the remedial alternatives for the site. Based on the initial screening, the most cost-effective remedial technology should be proposed for remediating the soil and/or groundwater at the site. After regulatory approval of the selected remedial alternative, field testing (if necessary) may be conducted to design the remedial system. Be aware that this pre-approval does not constitute a decision on reimbursement: necessary (as determined by the Fund) corrective action costs for action work directed and approved by the San Joaquin County Environmental Health Division (County)will be eligible for reimbursement at costs consistent with those pre-approved in this letter. However, depending on what happens in the field, some costs may not actually be necessary. If the Fund agrees that they were in fact necessary, the Fund will reimburse at reasonable rates (rates consistent with those pre-approved). In order for future costs for corrective action to be part of the expedited reimbursement process, they must be pre-approved in writing by Fund staff. All costs for corrective action must meet the requirements of Article 11, Chapter 16, Underground Storage Tank Regulations in order to be eligible for reimbursement. • The Fund will review any tasks/costs that go beyond the pre-approved amount to be determined if the additional tasks and costs are necessary and reasonable. However, if costs exceed the above pre-approved amounts, the Fund will be unable to expedite your Reimbursement Request. • The work products must be acceptable to the County. • If a different scope of work becomes necessary, then you must request pre-approval of costs on the new scope of work. • Although I have referred to the AGE proposal in my pre-approval above, please be aware that you will be entering into a private contract: the State of California cannot compel you to sign any specific contract. I also want to remind you that the Fund's regulations require that you obtain at least three bids, or a bid waiver from Fund staff, from qualified firms for all necessary future corrective action Ca/ilornia Bn viPonmenta/Protection Agency Qd RecydedPrpe,