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s " <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-%00 FAX(925)988-9673 <br /> Analytical <br /> 819 Striker Avenue Suite$ 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)79Z-0342 <br /> Gettler Ryan/G eostrat eg ies Client Prat ID Unocal 2859, 280054 Sampled 08/31/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-7 Received 09/01/98 <br /> Dublin,CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 09/11/98 <br /> Attention Deanna Harding Lab Number 9809003-08 Reported 09120198 <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) 2 0 N D <br /> Di-Isopropyl Ether (DIPE) 2 0 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 2 0 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 119 Q <br /> I <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> T ranlcher <br /> Project Manager Page 14 <br />