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California6gional Water Quality Cord Board <br /> j' Central Valley Region <br /> @�­w <br /> KarlE.Longley,ScD,P.E.,Chair <br /> Arnold <br /> Linda S.Adams <br /> Secretaryjor Sacramento Main Office Schw <br /> Environmental 11020 Sun Center Drive#200,Rancho Cordova,California 95670.6114 Governor nor <br /> Protection Phone(916)464-3291•FAX(916)464-4645 <br /> http://www.waterboards.ca.gov/centralvalley <br /> 12 June 2008 UIlISlVj15�V (�D <br /> Mr. Gil Moore JUN 13 2008 <br /> New West Petroleum, Inc. <br /> 1831 16th Street ENVIRONMENT HEALTH <br /> Sacramento, CA 95814 PERMIT/SERVICES <br /> LETTER REVIEW, NEW WEST PETROLEUM #1003 (SHELL BRANDED), <br /> 6437 BANNER STREET, LODI, SAN JOAQUIN COUNTY(CAO R5-2007-0709) <br /> I reviewed the Proposal for Split Sampling (Enclosed Request) submitted by facsimile on <br /> 11 June 2008 by your consultant Closure Solutions, Inc. (CSI). The Request references the results <br /> of the data collected during the second quarter 2008 groundwater monitoring, which CSI attached in <br /> an email to me on 11 June 2008. The Request notes the presence of low concentrations of ethanol, <br /> methanol, methyl tert-butyl ether (MTBE) and tertiary amyl methyl ether (TAME) across the site; and <br /> suggests those detections may represent an anomalous set of data for the above sampling event. <br /> CSI proposes to resample select wells and take split samples from each well, to be analyzed by two <br /> separate laboratories (Kill Analytical of Davis and California Laboratory Services of Rancho <br /> Cordova). The proposed wells are MW-4B, MW-7B, MW-813, MW-10B, MW-10D, MW-11B, MW- <br /> 12A, and EW-5. The laboratories will be instructed to use the same analyses used during the <br /> second quarter 2008 sampling event. Copies of the data will be forwarded to our office upon CST's <br /> receipt of the data from the laboratories. CSI proposes to work with Regional Board staff if <br /> additional action is deemed necessary. <br /> I concur to the proposed one-time split sampling event as necessary and appropriate. Add MW-9C <br /> since this is the guard well for municipal CSA-31 Well 2 and methanol was detected at 50 <br /> micrograms per Liter. Please note that CAO R5-2007-0709 and associated Monitoring and <br /> Reporting Program R5-2007-0808 require that any sampling over and above that which is required <br /> by the Order must be reported to the Regional Board. <br /> If you have any questions or comments, you may call me at (916) 464-4615 or email me at <br /> i barto n(a'_wate rboards.c�a.aov. <br /> � neerAMES L.L. BARTON, P.G. <br /> Engi <br /> ing Geologist <br /> UST Enforcement Unit II <br /> Enclosure <br /> cc: Mr. Mark Owens, UST Cleanup Fund, SWRCB, Sacramento <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Ronald Chinn, Closure Solutions, Inc., 1243 Oak Knoll Dr., Concord 94521 <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br />