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680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-Qi 00 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)79Z-0342 <br /> Gettler RyanZGeostrategles Client Prol ID Unocal SS#5886%2701 W March Sampled 09/01/98 <br /> 6747 Sierra Court Suite.! Sample Descript MW-3 Received 09/02/98 = <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 09/08/98 <br /> Attention Deanna Harding Lab Number 9809049-04 Reported 10101198 <br /> nstrument ID MS2 <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 4500 <br /> Di-Isopropyl Ether (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 9 9 <br /> Surrogates Control Limits % Recovery <br /> 1 2-Dlchloroethane-d4 76 114 92 <br /> 0 <br /> ,analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41271 <br /> T7FGranicher <br /> Project Manager Page 8 <br />