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1 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget 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 916921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 707 792-1865 FAX(707)79Z-0342 <br /> Gettler Ryan/Geostrategies Client Prod ID Unocal 2859, 280054 Sampled 08/31/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt MW-6 Received 09/01/98 <br /> Dubltn,-CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 09/11/98 <br /> Attention Deanna Harding Lab Number 9809003-07 Reported 09j20198 <br /> Oxygenate Compounds (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 1170 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> To ranicher <br /> Project Manager Page 12 <br />