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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Stnker Avenue Swte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792 0342 <br /> Pacific Environmental Group Client Project ID Unocal 0123, Tracy, CA Sampled Oct 22, 1998 <br /> 11315 Sunrise Gold Circle, Ste M Sample Descript Water,U-5 Received Oct 22, 1998 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8260 Analyzed Oct 26, 1998 <br /> } Attention Mike Mitchener Lab Number S810250 -01 Reported Oct 30, 1998 <br /> OXYGENATES by GC/MS (EPA 8260) <br />' Analyte Reporting Limit Sample Results <br /> lf9/L lig/L <br />' Ethanal 500 N D <br /> Tertiary butanol 100 N D <br /> Methyl tertiary butyl ether(MTBE) 20 N D <br />' Di-isopropyl ether(RIPE) 20 N D <br /> Ethyl tertiary butyl ether(ETBE) 20 N D <br /> Tertiary amyl methyl ether(TAME) 20 N D <br /> 1 - - <br /> 1 <br /> 1 <br /> Surrogate Control Limits,% Recovery,% <br />' 1,2-11ichforoethane-d4 76-114 95 <br /> 1 <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTIC L, ELAP #1210 <br /> 7 <br /> inda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> S810250 PES <1 n <br />