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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> }Y' 404 N Wiget Lane Walnut Creek.CA 94598 (9z5)988-9600 FAX(92 5)988-9673 <br /> �ll� 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 /> s _ <br /> F Gelder RyanGeostrategies Client Prol ID « Unocal 5886, 180137 85 u -« Sampled 06/17/98 <br /> ii 6747 Sierra Court Suite J Sample Descrlpt MW-48 Received 06/17/98 <br /> Dublin, CA 94568 MatrO( LIQUID ' <br /> Analysis Method EPA 8260 Analyzed 06/27/98 » <br /> Attention Deanna Harding _« Lab Number 9806C26-06 Reported 07109198 _ <br /> QC Batch Number MS062798826052A <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 12 <br /> DI-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 95 <br /> s <br /> Analytes reported as N D were not present above the stated Iurnt of detection <br /> SEQUOIA ANALYTICAL - ELAP 01271 <br /> y <br /> WGranicher <br /> ct Manager Page 14 <br />