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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-o 100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Analytical <br /> 155t Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Gettler-Ryan - Dublin Client Project ID Tosco SS#6981, Stockton Sampled Apr 19-20, 1999 <br /> 6747 Sierra Court, Suite J Sample Descript Water, VW-4 Received Apr 21, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Apr 29,. 1999 <br /> Attention Deanna Harding----- _Lab Number- _-904-1867 = - __ - Reported T May14,1999 - <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> pg/L !ag/L <br /> Ethanol 2,500 N D <br /> t-Butanol 500 N D <br /> et y t_Butyl Ether p - <br /> Di-Isopropyl ter 0 <br /> N 7- <br /> Ethyl t-Butyl Ether (ETBE) 10 N D <br /> t-Amyl Methyl Ether (TAME) 10 N D <br /> Surrogates Control Limit % % Recovery <br /> Dibromofl uoromethane 50 150 84 <br /> 1,2-Dlchloroethane-d4 50 150 105 ' <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 /> J lanne Fegley <br /> roject Manager <br /> 9041854 GET <16> <br /> r� <br />