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r <br /> 6) Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N eget Lane Walnut Creek CA 94598 (St0) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> GettlerRyan/Geostrategies - -- Client Prol IQ Unocal SS#5886-� - �- �- - - - Sampled 03/25/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-7S Received 03/25/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/31/98 <br /> Attention Deanna Harding Lab Number 9803G84-12 Reported 04108198 _ <br /> QC Batch Number MS033198MTBEF3A - <br /> Instrument ID F3 <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 4 1 <br /> Didsopropyl 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-Dichloroethane-d4 76 114 99 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> gory <br /> r t Manager Page 4 <br />