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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(915)988-9673 <br /> 4D- AvenueAnalytical 8t9Striker Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)79Z-1865 FAX(707) 792-0342 <br /> Blaine Tech Services Client Prol ID Chevron 9-8264/980609-J1 Sampled 06/09/98 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 06/10/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 06/20/98 <br /> Attention Fran Thie Lab Number 9806003-04 Reported 06j25198 <br /> QC Batch Number MS061998MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 2500 N D <br /> t-Butanol 500 N D <br /> Methyl t-Butyl Ether (MTBE) 10 590 <br /> Di-Isopropyl Ether (DIPS) 10 N D <br /> Ethyl t-Butyl Ether (ETBE) 10 N D <br /> t-Amyl Methyl Ether (TAME) 10 47 <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 104 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> &Manager <br /> roject Page 13 <br />