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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-%00 FAX(925)988-9673 <br /> 819 Straker 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 /> Blaine Tech Services Client Proj ID Shell 6131 Pacific Ave Sampled 11/23/98 <br /> 1680 Rogers Avenue Sample Descrlpt MWA Received 11/25/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 12/03/98 <br /> Attention Fran Thle LabNumber 98111-155-04 Reported 12J13198 <br /> QC Batch Number MS120298MTBEH6A _ <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> t-Butanol 5000 N D <br /> Methyl t-Butyl Ether (MTBE) 100 160 <br /> D1-Isopropyl Ether (DIPE) 100 N D <br /> Ethyl t-Butyl Ether (ETBE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limits % % Recovery <br /> 1 2-Dichloroethane-d4 76 114 100 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANA YTICAL - ELAP #1210 <br /> y P er <br /> ct Manager <br /> Page 7 <br />