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680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N Weget lane Watnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916} 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science &Tech Client Prof ID Exxon 7-3942, 51539 42 1300 Sampled 11/11/97 <br /> U <br /> 68 Mt Diablo Blvd Ste B100 Sample Descnpt MW11 Received 11/12/97 <br /> fayette, CA 94549 Matrix LIQUID D <br /> Analysis Method EPA 8260 Analyzed 11/21/97 <br /> Attention Christa Marting Lab Number 9711732-07 Reported 12J02J97 <br /> C Batch Number MS112197MTBEF3A <br /> strument ID F3 <br /> Oxygenate Compounds (EPA 8260) <br />'Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />-t- <br /> thanol 500 N D <br /> Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> iEthyl 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 86 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />[EQUOIAANAL"CAL - ELAP #1210 <br /> rd Herling <br /> ct Manager Page 10 <br />