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Sequoia <br />� Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-4111 <br />(650)232-9600 <br />FAX (650) 232-9612 <br />www sequoialabs com <br />Gettler-Ryan/Geostrategies(l) Project Chevron(]) Sampled 6129100 <br />6747 Sierra Court, Suite J Project Number Chevron 9-5775 Received 6130100 <br />Dublin, CA 94568 Project Manager Scott Polston Reported 715/00 <br />Volatile Organic Oxygenated Compounds by EPA Method 8260A <br />Sequoia Analytical - San Carlos <br />Batch Date Date Surrogate Reporting <br />Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br />EX -1 L006253-01 Water <br />Tert-butyl alcohol 250000 ND " <br />Methyl tert-butyl ether 5000 325000 " <br />D1 -isopropyl ether 5000 ND " <br />Ethyl tert-butyl ether 5000 6450 " <br />Tert-amyl methyl ether 5000 ND <br />Surrogate 11-Dichtoroethane-d4 760-114 103 <br />• <br />Sequoia Analytical - San Carlos *Refer to end of report for text of notes and definit <br />Page 3 of 6 <br />