SITE INFORMATION AND CORRESPONDENCE

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w Control Board = �� �w State Water Resources Gray Davis . t Division of Clean Water rograms Governor 2014 T Street•Sacramento,California 95814•(916)227-2505 Mailing Address: P.O.Box 944212•Sacramento,California•94244 21 e Winston H.Hickox FAX(916)227-4530•Internet Address: http://%x-%v�,v.swrcb.ca.gov/—cwp Secretaryfor Environrnental Protection February 2, 1999 Michael D McGranahan, Administrator Louis Moresco,Jr. Liquidating Trust P O Box 5018 Modesto, CA 95352 PRE-APPROVAL OF CORRECTIVE ACTION COSTS, CLAIM NO. 010323, SITE ADDRESS: 16865 GAWNE RD, STOCKTON, CA 95205 I have reviewed your request, received on January 4, 1999, for pre-approval of corrective action costs; I will place these documents in your file for future reference. With the following provisions, the total cost pre-approved as eligible for reimbursement for completing the November 4, 1998, Geological Technics, Inc. (GTI) workplan approved by the San Joaquin County EHD in their November 4, 1998 letter, is S 12,060; see the table below for a breakdown of costs. The total amount of your workplan has been approved,but the work content has been amended. The 1996 GTI Site Characterization Report found soil petroleum contamination to approximately 70 ft bls. MTBE was not sampled for during the site characterization. The groundwater is reported to be approximately 110 ft bls. Soil samples should be taken every 5 ft and analyzed using a mobil lab, if possible. If the soil contamination ends at approximately 70 ft bls, as it did in 1996, the borehole should be abandoned and the well should not be installed into the groundwater. This will reduce the possibility of contaminating a clean aquifer by providing a conduit to the overlying soil contamination. However, if petroleum contamination is found every 5 ft extending down into the groundwater,the well should be installed and sampled as planned. The UST Cleanup Fund office should be notified of the date of the drilling event. Be aware that this pre-approval does not constitute a decision on reimbursement: all reasonable and necessary corrective action costs for work directed and approved by the County will be eligible for reimbursement per the terms of your Letter of Commitment at costs consistent with those pre-approved in this letter. All future costs for corrective action must be approved in writing by Fund staff. Future costs for corrective action must meet the requirements of Article 11, Chapter 16, Underground Storage Tank Regulations. California Environmental Protection Agency 0s,1 Rervrlod Panrr _ -