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y 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 fAX(925)988-9673 <br /> Analytical 814 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)79Z-1865 FAX(707)792-0342 <br /> �ettler-Ryan - Dublin Client Project ID Unocal S8#5886, Stockton Sampled Mar 1, 1999 <br /> 6747 Sierra Court, Suite J Sample Descrlpt Water, MW-1 Received Mar 2 1999 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Mar 15, 1999 <br /> Attention Deanna Harding Lab Number 903-0234 Reported Mar 24, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> pg/L !19/L <br /> Ethanol 2,500 N D <br /> t-Butanoi 500 N D <br /> et y t-Butyl t er 10 530 <br /> i- sopropy ter ) 10 <br /> Ethyl t-Butyl Ether (ETBE) 10 N D <br /> t-Amyl Methyl Ether (TAME) 10 N D <br /> Surrogates Control Limit % °'° Recovery <br /> Dlbromofluoromethane 50 150 104 <br /> 1 2-Dichloroethane-d4 50 150 80 <br /> 0 <br /> Analytes reported as N D were not present above the stated lima of detection Because matrix effects and/or other factors <br /> required additional sample dilution detection limits for this sample have been rased <br /> SEQUOIA ANALYTICAL., #1271 <br /> ul nne Fegley <br /> roject Manager <br /> 9030233 G ET <5> <br />