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' 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9Z33 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Sinker 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 ID Unocal 0123, Tracy, CA Sampled NA, <br /> 11315 Sunrise Gold Circle, Ste M Sample Descnpt Method Blank Received NA <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8260 Analyzed Oct 26, 1998 <br /> Attention Mike Mitchener Lab Number BLK102698 Reported Oct 30, 1998 <br /> 1 <br /> OXYGENATES by GC/MS (EPA 8260) <br />' Analyte Reporting Limit Sample Results <br /> Ng/L Ng/L <br />' Ethanol 500 N D <br /> Tertiary butanol 100 N D <br /> Methyl tertiary butyl ether (MTBE) 20 N D <br />' Di-isopropyl ether(DIPE) 20 N D <br /> Ethyl tertiary butyl ether (ETRE) 20 N D <br /> Tertiary amyl methyl ether(TAME) 20 N D <br /> 1 - <br /> 1 <br /> Surrogate Control limits, % Recovery,% <br /> 1,2 Dichloroethane-d4 76-114 g8 <br /> 1 <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, ELAP#1210 <br /> Iis C Schn Ider <br /> Project Manager/Sacramento Laboratory <br /> �q S810250 PES <3> <br />