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Sequoia 404 wfget Lane <br /> Watnut Geek CA 94598 <br /> 4D— (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Gettler-Ryan - Dublin talent Project Ib Tosco 88#6981, Stockton Sampled Jul 15, 1999 • <br /> 6747 Sierra Court, Suite J Sample Descript Water, VW-3 Received Jul 16, 1999 <br /> Dublin,CA 94568 Analysis Method EPA 8260 Analyzed Jul 29, 1999 <br /> Attention Deanna Harding Lab Number 907-1241 Reported Aug 4, 1999 <br /> mm OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Ng/L rug/L <br /> t-Butanol 5,000 N D <br /> [Methyl t-Butyl Ether . . . .. .. .. 100 .. .... . . 4,900 <br /> Di-Isopropyl ter 100 <br /> Ethyl t-Butyl Ether(ETBE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limit% %Recovery <br /> Dibromofluoromethane 50 150 114 <br /> 1,2-Dichloroethane-d4 50 150 108 <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 /> h nne Fegley <br /> P lect Manager <br /> 9071230 GET <14> <br />