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Sequoia 680 Chesapeake Drive Redwood City cA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N LVlget Lane Walnut Creek.CA 94598 (9Z5)988-9600 FAX(925)988-%73 <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 /> Y <br /> i <br /> 3 Gettler Ryan/Geostrategles -- - Client Proj ID Tosco SS#6981,1180138 85� Sampled 05/27/98 L° <br /> 6747 Sierra Court Suite J Sample Descrlpt VW-4 Received 05/28/98 _ <br /> 1' Dublin, CA 94568 Matrix LIQUID = <br /> Analysis Method EPA 8260 Analyzed 06/03/98 = <br /> Attention Deanna Harding _ Lab Number 9805H47-13 Reported 07/24/98 <br /> QC Batch Number MS060298MTBEF2A <br /> Instrument ID F2 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 1250 N D <br /> t-Butanol 250 N D <br /> Methyl t-Butyl Ether (MTBE) 50 N D <br /> Di-Isopropyl Ether (DIPE) 50 N D <br /> Ethyl t-Butyl Ether(ETBE) 50 N D <br /> t-Amyl Methyl Ether (TAME) 50 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 83 <br /> Analytes reported as N 0 were not present above the stated hmEt of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Ftranicher <br /> Manager Page 24 <br />