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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(925)988-9673 <br /> Analytical 14 McDowell <br /> 5Avenue Suite Sacramento CA 95834 (916)922-9600 FAX(916)921-0300 <br /> 1455 McDowell Bivd North <br /> h Ste D Petaluma.CA 94954 (707)792-1$65 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 2859, 280054 Sampled 08/31/98 <br /> " 6747 Sierra Court Suite J Sample Descript MW-8 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 9809003-09 Reported 09f20f98 <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 (DIPE) 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-Dlchloroethane-d4 76 114 118 Q <br /> i <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> *I-ranicher <br /> Project Manager Page 16 <br />