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f <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> Analytical 819 Sulker Avenue Suite 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 IIS Unocal 0123, Tracy, CA Sampled Oct 8, 1998 <br /> 11315 Sunrise Gold Circle, Ste M Sample Descript Water, B-4 @ 25' Received Oct 7, 1998 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8260 Analyzed Oct 18, 1998 <br /> Attention Mike Mitchener Lab Number S810088 -01 Reported Oct 20, 1998 = <br /> OXYGENATES by GUMS (EPA 8260) <br />' Analyte Reporting Limit Sample Results <br /> Ng/L pg1L <br />' Ethanol 500 N D <br /> Tertiary butanol 100 N D <br /> Methyl tertiary butyl ether(MTBE) 20 N D <br />' Di-isopropyl ether(DIPS) 20 N D <br /> Ethyl tertiary butyl ether(ETBE) 20 N D <br /> Tertiary amyl methyl ether(TAME) 20 N D <br />' Surrogate Control Limits, % % Recovery <br />.1,2-D,chloroethane-d4 76-114 98 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br />' Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTIC L, FLAP#1210 <br />?�(inda C Schneider <br /> ect Manager/Sacramento Laboratory <br />' S810088 PES <3> <br />