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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)968-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan[Geostrategies Client~Prol ID m^ UNOCAL 2859, Stockton - - ~~� Sampled- 06/18/98 <br /> 16747 Sierra Court Suite J Sample Descript MW-1 Received 06/18/98 <br /> 3 Dublin, CA 94568 Matrrx LIQUID <br /> 3 Analysis Method EPA 8260 Analyzed 06/28/98 , <br /> Attention Deanna Harding _ ~ _Lab Number-9806C89-02_ __ - _~ ~ _ _ Reported 07f10198 <br /> QC 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 (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETB ) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 95 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01271 <br /> ranicher <br /> Project Manager Page 5 <br />