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Sequoia Geo 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 /> Analytical 819 Striker Avenue Sulte 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 /> *Upgradient �nvlronmenial Clfent P' 'ect IIS Conrady Property <br /> Y Sampled Se 24, 1999 ' <br /> P O Box 8002 Sample Descnpt Water, MW-2 Received Sep 24, 1998 <br /> Stockton, CA 95208 Analysis Method EPA 5030/8260 Analyzed Oct 7, 1998 <br /> Attention Vic Cherven Lab Number S809299 -02 Reported Oct 8, 1998 <br /> OXYGENATES by GC/MS (EPA 8260) <br /> Analyte Reporting Limit Simple Results <br /> liglL pg/L <br /> Tertiary butanol 100 N D <br /> Methyl tertiary butyl ether(MTBE) 2 0 N D <br /> Di-isopropyl ether(DIPE) 20 N D <br /> Ethyl tertiary butyl ether(ETRE) 20 N D <br /> Tertiary amyl methyl ether(TAME) 20 N D <br /> Surrogate Control Limits, % % Recovery <br /> 1,2-Dichloroethane-d4 50-150 107 <br /> 0 <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTI AL, ELAP #1271 <br /> inda C Sch eider <br /> roject Manager/Sacramento Laboratory <br /> 51109299 UES <2> <br />