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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 s,a3te 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)79Z-0342 <br /> Gettler Ryan[Geostrategies ----� - Client Proi ID UNOCAL 2859, Stockton _Sampled 06%18/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt MW-7 Received 06/18/98 _ <br />=_ Dublin, CA 94568 Matrm LIQUID - <br /> Analysis Method EPA 8260 Analyzed 06/28/98 <br /> Attention Deanna Harding_- _ Lab Number 9806C90-08 _ _ _ _ Reported 07110198 <br /> OC Batch Number MS062898803052A <br /> Instrument ID MS-2 <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 (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 95 <br /> i <br /> Analytes reported as N❑ were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> LA <br /> T <br /> Prprar�lcher <br /> t Manager Page 5 <br />