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■ 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> SequoiaFAX(92S)988-9673 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a— ) <br /> Analytical 814 Stroker 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 /> Gettler-Ryan Geostrategies _ - Client Prol ID Unocal 5886, 180137 85 M -Sampled 06/17/98 - <br /> 6747 Sierra Court Suite J Sample Descnpt MW-2 Received 06/17/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method BPA 8260 Analyzed 06/27/98 <br /> Attention Deanna Harding Lab Number -9806C26-03 _ Reported 07/09198 _ <br /> QC Batch Number MS062798826052A <br /> Instrument ID MS-2 <br /> Fuel Oxygenates by 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 2100 <br /> Dl-Isopropyl Ether(DIPS) 20 N D <br /> Ethyl t-Butyl Ether(ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 2.0 67 <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 95 <br /> 0 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41271 <br /> �Granicher <br /> ct Manager Page 5 <br />