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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 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92I-0100 <br /> 1455 McDowell Blvd North Sre D Petaluma.CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Gettler-Ryan-Dublin Client Project ID Unocal SS#5886, Stockton Sampled Mar 1, 1999 <br /> 6747 Sierra Court, Suite J Sample Descript Water, MW-60 Received Mar 2, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Mar 15, 1999 <br /> Attention Deanna Harding Lab Number 903-0241 Reported Mar 24, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> N9/L Ng/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> et y t-Butyl ter 2.0 12 <br /> i- sopropy ter 2 0 <br /> Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limit % % Recovery <br /> Dibromofluoromethane 50 150 97 <br /> 1 2-Dlchloroethane-d4 50 150 86 <br /> Anaiytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> •u nne Fegley <br /> roject Manager <br /> 9030233 G ET <12> <br />