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ID Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650}364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> qQF Analytical 819 Striker 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 /> ttler-Ryan -Dublin Client Project ID J Unocal 89#5098, Stockton Sampled Dec 22, 1998 <br /> 47 Sierra Court, Suite J Sample Descrlpt Water, MW-10 Received Dec 23, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Jan 5, 1999 <br /> Attention Deanna Harding Lab Number 812-2065 Reported Jan 13, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> !1g/L yg/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limit% % Recovery <br /> 1,2-Dlchloroethane-d4 50 150 90 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> tL� <br /> anne Fegley <br /> Project Manager <br /> 8122064 CET [5> <br />