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Sequoia 680 Chesapeake Drive Redwood CityCA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) <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 /> • <br /> Gettler RyanZGeostrategies Client Pral ID Tosco SS#6981, 180138 85 " Sampled 05/27/98 ' <br /> 3 6747 Sierra Court Suite J Sample Descrlpt MW-5 Received 05/28/98 <br /> 2 Dublin, CA 94568 Matrix LIQUID = <br /> I Analysis Method EPA 8260 Analyzed 06/04/98 <br /> w Attention Deanna Harding _ Lab Number 9805H47-05 _ _ Reported 07124/98 " <br /> QC Batch Number MS060298MTBEF2B <br /> Instrument ID F2 <br /> Oxygenate Compounds (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 78 <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 85 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEOUOiA ANALYTICAL - ELAP 01210 <br /> Td&ranlcher <br /> P t Manager Page 8 <br />