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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 /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)791-1865 FAX(707)792-0342 <br /> Gettler RyanZGeostrategies Client Prof 1D - Unocal SS#5886/2701 W March -- Y Sampled 09/01%98 <br /> 6747 Sierra Court Suite J Sample Descript MW-5D Received 09/02/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method ERA 8260 Analyzed 09/08/98 - <br /> Attention Deanna Harding _ Lab Number 9809049-07 Reported 10j01 j98 - <br /> nstrument ID MS2 <br /> Fuel Oxygenates by EPA 8260 <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> DI-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1 2 Dichloroethane-d4 76 114 98 <br /> G <br /> ,naiytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> To Granicher <br /> ,project Manager Page 19 <br />