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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (5 10)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br />-i1.. _ ; » <br /> Gettler Ryan - eostrategies » -Client Proj ID Chevron 9-6171, Stockton Sampled 11/11/97 <br /> 3 6747 Sierra Court Suite G Sample Descrlpt MW-6 Received 11/11/97 <br /> 1 Dublin, CA 94568 Matrix LIQUID « <br /> Analysis Method EPA 8260 Analyzed 11/18/97 <br /> Attention Deanna Harding _ _ _ _ Lab Number 9711618-03 Reported«11J21J97 <br /> QC Batch Number MS111697MTBEF2A <br /> Instrument ID F2 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 1250 N D <br /> t-Butanol 250 N D <br /> Metyi t-Butyl Ether(MTBE) _ .. .. 50 -- - 20 <br /> DI-Isopropyl Ether(DIPE) 50 N D <br /> Ethyl t-Butyl Ether(ETBE) 50 N D <br /> t-Amyl Methyl Ether(TAME) 50 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 96 <br /> is <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> Gregory <br /> et Manager Page 4 <br />