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• 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek.CA 94598 (9ZS)988-9600 FAX(9Z5)988-9673 <br /> trill>� 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)792-186S FAX(707)792-0342 <br /> 2 Gettler RyaniGeostrategies Client Prol ID Tosco SS#6981,-180138 85- -Sampled 05/27/98 <br /> 13 6747 Sierra ourt Suite J Sample Descript MW-7 Received 05/28/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 06/03/98 <br /> Attention Deanna Harding --Lab Number. 9805H47-07 _ Reported_07124198 <br /> GC Batch Number MS060298MTSEF2A <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 53 <br /> DI-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 86 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> Wcte <br /> anicher <br /> M <br /> anagerr Page 12 <br />