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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FIX(650)364 9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FIX(925)988 9673 <br /> ��►► Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FIx(916) 921 0100 <br /> 1455 McDowell Btvd North Ste D Petaluma, CA 94954 707 792-1865 F/X( 07)792 0342 <br /> pgradient Environmental Client project ilk ' Conrady property Sampled WiA <br /> P O Box 8002 Sample Descrlpt Method Blank Received NIA <br /> Stockton, CA 95208 Analysis Method EPA 5030/8260 Analyzed Oct 7, 1998 <br /> Attention Vic Cherven Lab Number BLK100798 Reporte=d Oct 8, 1998, <br /> OXYGENATES by GCIMS (EPA 8260) <br /> Analyte Reporting Limit Sample Results <br /> pg/L pg/L <br /> Tertiary butanol 100 N D <br /> Methyl tertiary butyl ether(MTBE) 2 0 N D <br /> Di-isopropyl ether(DIPS) 2 0 N D <br /> Ethyl tertiary butyl ether(ETBE) 20 N D <br /> Tertiary amyl methyl ether(TAME;) 20 N D <br /> Surrogate Control Limits, % % Recovery <br /> 1,2-Dlchloroethane-d4 50-150 91 <br /> • <br /> i <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SE=QU IA ANALYTICAL, ELAP 91271 <br /> inda C Sch eider <br /> to <br /> ject Manager/Sacramento Laboratory <br /> SWUM UES a11> <br />