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1i <br /> CLOSURE SOL•NSA INC. <br /> D <br /> � <br /> JUN 12 2008 <br /> ' June 11, 2008 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> ' Mr. Jim Barton, P.G. <br /> California Regional Water Quality Control Board—Central Valley Region <br /> ' 11020 Sun Center Drive#200 <br /> Rancho Cordova, California 95670-6114 <br /> Re: Proposal for Split Sampling <br /> Flag City New 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-413, MW-713, <br /> ' MW-813, MW-IOB, MW-IOD, MW-I IB, MW-12A, and EW-5, and submit them to two separate <br /> California FLAP Certified laboratories. <br /> ' The collected split samples will be submitted to Kiff Analytical of Davis California, and CLS of <br /> Rancho Cordova. The samples would be analyzed for the same constituents run during the 2QO8 <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 Regional Water <br /> Quality Control Board to identify an appropriate course of action, if deemed necessary. <br /> 1 1243 Oak Knoll Drive a Concord, CA 94521 <br /> (800) 988-7880 <br />