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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> ID 404 N Wiget Lane Walnut Creels.CA 94598 (925)988-%00 FAX(925)988-%73 <br /> qwr 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 /> ler-Ryan - Dublin Client Project ID Unocal SS#5886, Stockton Sampled Mar 1, 1999 <br /> 7 Sierra Court, Suite J Sample Descript Water, MW-3 Received Mar 2, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Mar 15, 1999 <br /> Attention Deanna Harding Lab Number 903-0236 Reported Mar 24, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> pg/L fig/L <br /> Ethanol 100,000 N D <br /> t-Butanol 20,000 N D <br /> Methyl t-Butyl Ether 400 31,000 <br /> Di-Isopropyl ter 400 <br /> Ethyl t-Butyl Ether (ETBE) 400 N D <br /> t-Amyl Methyl Ether (TAME) 400 N D <br /> Surrogates Control Limit % % Recovery <br /> Dibromofluoromethane 50 150 97 <br /> 1 2-Dlchloroethane-d4 50 150 82 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution,detection limits for this sample have been raised <br /> SEQUOIA ANALYTICAL, #1271 <br /> tJanne Fegleyct Manager <br /> 9030233 GET <7> <br />