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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9733 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 FAX 916) 921-010 0 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 707 792-1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 5421 Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descript UX-2-23 Received 04/17/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/21/98 <br /> Analysis Method EPA 8260 Analyzed 04/21/98 <br /> Attention Clyde Galantine Lab Number 9804618-01 Reported 04/29198 <br /> QC Batch Number MSO41698MTBEEXA <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/k9 u9/kg <br /> Ethanol 25000 N <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-Dichloroethane-d4 70 121 98 <br /> Analytes reported as N D were not present above the stated ltmlt of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Oaonagger <br /> o <br /> Page 1 <br />