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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364-9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 79Z-1865 FAX(707)79Z-0342 <br /> Gettler Ryan1Geostrategies Client Prof ID Former Unocal #5421 Sampled 04/15/98 <br /> 6747 Sierra Court Suite J Sample Descript UX-2-22 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/16/98 <br /> Analysis Method EPA 8260 Analyzed 04/21/98 <br /> Attention Clyde Galantine Lab Number 9804A15-03 Reported 04/23J98 <br /> OC Batch Number MSO41698MTBSEXA <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/kg ug/kg <br /> Ethanol 25000 N D <br /> t-Butanol 5000 N D <br /> Methyl t-Butyl Ether (MTBE) 100 N D <br /> Di-Isopropyl Ether (DIPE) 100 N D <br /> Ethyl t-Butyl Ether (ETRE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dlchloroethane-d4 70 121 82 <br /> 0 <br /> Analytes reported as N D were not present above the stated limrt of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> ry <br /> r lett Manager Page 3 <br />