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Sequoia 680 Chesapeake Drive Redwood City 4 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CAA 94598598 (925)958-9600 FAX(925)9$$-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blame Tech Services Client Proj ID Shell 2575 Country Club Blvd Sampled 10/06/98 <br /> 1680 Rogers Avenue Sample Descript 2454CC Received 10/08/98 <br /> San.lose, CA 95112 Matrix LIQUID <br /> Analysis Method=EPA-8260 Analyzed–10%19/98— <br /> Attention Fran Thie Lab Number 9810742-15 Reported 10127j98 <br /> QC Batch Number MS101998MTBEF2A <br /> Instrument ID F2 <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-Dichloroethane-d4 76 114 112 <br /> Analytes reported as N D ere not present above the stated limit of detection <br /> SEQUOIA AN L ICAL - ELAP #1210 <br /> Peggy Penner <br /> Project Manager Page 7 <br />