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ex� Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364%W FAX(650)364-9333 <br /> 404 N Wgct Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies�� Ghent Prol ID Unocal SS# 5886 Sampled 03/25/98" µ <br /> 6747 Slerra Court Suite J Sample Descrlpt MW-2 Received 03/25/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/30/98 <br /> a Attention Deanna Harding " Lab Number 9803G82-03 Reported 04J08f98 <br /> dC-Batch Number MS032898MT13EH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 5000 N D <br /> t-Butanol 1000 N D <br /> Methyl t-Butyl Ether (MTBE) 20 1600 <br /> DI-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 24 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 90 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - SLAP #1210 <br /> ry <br /> r le Manager Page 5 <br />