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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(915)921-0100 <br /> loop Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma C4 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler RyanGeostrategies �^ Client Proj ID Tosco SS#6981,180138 85 -- - Sampled 05/27/98 » <br /> ° 6747 Sierra Court Suite J Sample Descrlpt MW-9 Received 05/28/98 <br /> Dublin, CA 94568 Matrm LIQUID <br /> Analysis Method EPA 8260 Analyzed 06/02/98 <br /> ;_Attention_Deanna Harding Lab Number 98051-147-09 = Reported 07124198 - <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 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPS) 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-Dichloroethane-d4 76 114 83 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Wct <br /> ranlcher <br /> Manager Page 16 <br />