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CLOSURE SOLUTIONS, INC. <br /> June 11, 2008 <br /> Mr. Jim Barton,P.G. <br /> California Regional Water Quality Control Board—Central Valley Region <br /> 11020 Sim Center Drive#200 <br /> Rancho Cordova, California 95670-6114 <br /> Re: Proposal for Split Sampling <br /> Flag City Now West#1003 <br /> 6437.West Banner Street <br /> Lodi,California <br /> CVRWQCB LUFT Case No.391163 <br /> Dear Mr. Barton: <br /> On behalf of New West Stations, Inc. (New West), Closure Solutions, Inc. (Closure Solutions) <br /> has prepared this Proposal for Split Sampling for the New West—Flag City facility, located at <br /> 6437 West Banner Street,in San Joaquin County near Lodi, California. <br /> As described in the attached e-mail (Attachment A), the Second Quarter 2008 groundwater <br /> analytical results indicated that low concentrations of ethanol, methanol, MTBE and TAME are <br /> present across the Site. The analytical results for the Second Quarter 2008 groundwater <br /> sampling event are included in Attachment B. <br /> Based on our experience, we believe the ethanol and methanol detections to be anomalous, <br /> which throws into question the validity of the MTBE and TAME results. Because of this, <br /> Closure Solutions proposes to collect split groundwater samples from wells MW-4B, MW-7B, <br /> MW-8B, MW-10B,MW-1017,MW-11B,MW-12A, and EW-5, and submit theta to two separate <br /> California ELAP Certified laboratories. <br /> The collected split samples will be submitted to Ki£f Analytical of Davis California, and CLS of <br /> Rancho Cordova. The samples would be analyzed for the same constituents run during the 2Q08 <br /> quarterly groundwater monitoring event. The requested tum-around time would be standard in <br /> both cases. Closure Solutions will forward copies of analytical results to your office upon <br /> receipt. Once these results are available, Closure Solutions will work with the Rcgional Water <br /> Quality Control Board to identify an appropriate course of action,if deemed necessary. <br /> 1243 Oak Knoll Drive n Concord, CA 94521 <br /> (800) 988-7880 <br /> wti^.t•.L l:�,urniuEcaa.•on: <br />