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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget lane Walnut Creek CA 94598 (92S)988-9600 FAX(92 5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-%00 FAX(916)921-0100 <br /> �II Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ,* <br /> Gettler Ryan/Geostrategies Client Pro) ID Unocal 2859, 280054 Sampled 08/31/98 <br /> 6747 Sierra Court Suite J Sample Descrlpt MW-2 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 9809003-03 Reported 09f20198 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 100000 N D <br /> t-Butanol 20000 N D <br /> Methyl t-Butyl Ether (MTBE) 400 N D <br /> Di-Isopropyl Ether (DIPE) 400 N D <br /> Ethyl t-Butyl Ether (ETBE) 400 N D <br /> t-Amyl Methyl Ether(TAME) 400 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 119 Q <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEOUOIA ANALYTICAL - ELAP 41210 <br /> i <br /> i <br /> i <br /> Granicher <br /> Project Manager Page 4 <br />