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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 15) 404 N Wiget lane Walnut Creek.CA 94598 (9Z5)988-9600 FAX(925)988-%73 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-oio0 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-034Z <br /> *ettler-Ayan=Dublin Client Project ID'A Unocal 88#5098, Stockton Sampled Dec 22, 1998 <br /> 747 Sierra Court, Suite J Sample Descript Water, MW-11 Received Dec 23, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Jan 5, 1999 <br /> Attention Deanna Harding Lab Number 812-2066 Reported Jan 13, 1999 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Jf9/L 119/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether(MTBE) 20 N D <br /> D1-lsopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETRE) 2 0 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limit % % Recovery <br /> 1,2-Dichloroethane-d4 50 150 10 * <br /> Dibromofluoromethane 50 150 82 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> * Surrogate recovery below control limit due to matrix Interference <br /> Internal standard was acceptable <br /> Julian�Fegley <br /> Project Manager <br /> 8122064 GET <6> <br />