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4 r <br /> Y <br /> 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 /> Striker Avenue Since 8 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 /> Analytical 819 <br /> filer-Ryan-Dublin Client Project lb Tosco #11193, Stockton Sampled Dec 17, 1998 <br /> 6747 Sierra Court, Suite J Sample Descript Water, Water-FTE Received Dec 17, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 8260 Analyzed Dec 18, 1998 <br /> Attention Doug Lee Lab Number 812-1494 Reported Dec 22, 1998 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> 1f9/L Fig/L <br /> Ethanol 50,000 N D <br /> t-Butanol 10,000 N D <br /> Methylt- uty ter 200 120,000 <br /> r sopropy ter 200 <br /> Ethyl t-Butyl Ether (ETSE) 200 N D <br /> t-Amyl MethylEther 200 210 <br /> Surrogates Control Limit% % Recovery <br /> 1,2-Dichloroethane-d4 50 150 93 <br /> • <br /> Analytes reported as N 0 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 /> ?han'ne Fegley <br /> Project Manager <br /> 8121494 GET <2> <br />