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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �,,I,�► 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)792-1865 FAX(707)792-0342 <br /> GettEer Ryan%Geostrategies - Client Prot 1D - UNOCAL 2859, Stockton M --T Sampled- 06/18%98 <br /> A 6747 Sierra Court Suite J Sample Descnpt MW-9 Received 06/18/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 06/28/98 -' <br /> ;Attention Deanna Harding_ _ — _ Lab Number 9806C90_10 _ Reported 07J10198 ' <br /> CC 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 (ETBE) <br /> 20 <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 96 <br /> 40 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41271 <br /> Aboranic <br /> ct Manager Page 9 <br />