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680 Chesapeake Drive Redwood City CA 94063 •50)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> � <br /> Analytical <br /> 819 Striker Avenue Suite$ Sacramento CA 95834 (916)921-9600 FAx(916)921-0100 n <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 10acific'Environmental Group Client Protect ID} Chevron 9-9840, Stockton, CASampled Sep 24, 1958 <br /> 11 Sunrise Gold Circle, Ste M Sample Descript Sod, MW-1 @ 70' Received Sep 28, 1998` <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8260 Extracted Oct 6, 1998 <br /> Attention Tim Anenson Lab Number S809342 -13 Analyzed Oct 8, 1998 <br /> Reported Oct 12, 1998'` <br /> OXYGENATES by GC/MS (EPA 8260) <br /> Analyte Reporting Limit Sample Results <br /> Ng/kg N91kg <br /> Ethanol 25,000 N D <br /> Tertiary butanol 5,000 N D <br /> Methyl tertiary butyl ether(MTBE) 100 N D <br /> Di-isopropyl ether(DIPS) 100 N D <br /> Ethyl tertiary butyl ether(ETBE) 100 N D <br /> Tertiary amyl methyl ether(TAME) 100 N D <br /> Surrogate Control Limits, % % Recovery <br /> 1,2-Dichloroethane-d4 50-150 98 <br /> 0 <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, FLAP#1 1 <br /> inda C Schneider <br /> Protect Manager/Sacramento Laboratory <br /> S809342 PES a3> <br /> .fJ�. <br />