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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650) 364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prol ID Chevron 9-6171, 981118-K1 Sampled 11/18/98 <br /> 1680 Rogers Avenue Sample Descrlpt OW-1 Received 11/19/98 <br /> San .dose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 11/24/98 <br /> Attention Christine Lillie Lab Number 9811D34-07 Reported 12103198 <br /> QC Batch Number MS112498MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 625 N D <br /> t-Butanol 125 N D <br /> Methyl t-Butyl Ether (MTBE) 25 44 <br /> Di-Isopropyl Ether (DIPS) 25 N D <br /> Ethyl t-Butyl Ether (ETBE) 25 N D <br /> t-Amyl Methyl Ether (TAME) 25 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 112 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br />'11111111111115lect Manager Page 8 <br />