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Sequoia 680 Chesapeike Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9Z33 <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)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategles Client Prod ID Former Unocal #5421 Sampled 04/15/98 <br /> 6747 Sierra Court Suite J Sample Descript UX-4-17 Received 04/16/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/16/98 <br /> Analysis Method FPA 8260 Analyzed 04/21/98 <br /> Attention Clyde Galantine Lab Number 9804A15-05 Reported 04J23198 <br /> GSC Batch Number MSO41698MTBEEXA <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 (ETBE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 70 121 q <br /> i . <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN Ll ICAL - ELAP #1210 <br /> o ry <br /> Wo�ect Manager Page 5 <br />