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6 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creels.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 8t9 Striker Avenue Suite a 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 /> Mettler-Ryan - Dublin Client Project ID Unocal SS#5886, Stockton Sampled Mar 1, 1999 <br /> 747 Sierra Court, Suite J Sample Descnpt Water, MW-4S Received Mar 2, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Mar 15, 1999 <br /> Attention Deanna Harding Lab Number 903-0238 Reported Mar 24, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> 119/L Ing/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> et yl t-8utyl Ether 20 31 <br /> Di-Isopropyl ter ( 20 <br /> Ethyl t-Butyl Ether (ErBE) 20 N D <br /> t-Amy! Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limit % % Recovery <br /> Dibromotluoromethane 50 150 99 <br /> 1 2-Dichloroethane-d4 50 150 83 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> 4 <br /> J anne Fegley <br /> roject Manager <br /> 9030233 GET <9> <br />