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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> -1 404 N Wigtt Lane Walnut Creek CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 5455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)79Z-1865 fAX(707)792-0342 <br /> - Gettler Ryan/Geostrategies - Client Prof ID Unocal SS#0123 J ^» » »» Sampled 09/28/98 <br /> 6747 Sierra Court Suite J Sample Descript U-4 Recelved 09/28/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 11/03/98 <br /> , <br /> - Attention Deanna Harding Lab Number 98091-150-05 Reported I IJ10198 = <br /> QC Batch Number-MS110298MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> DI-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether(ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 12-Dichioroethane-d4 76 114 100 <br /> 10 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Granicher <br /> roject Manager Page 20 <br />