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680 Chesapeake Dnve Redwood Ciry CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94596 (510) 988 9600 FAX(5 10) 986 9673 <br /> Analytical 8t9 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> EA Engineering Science $Tech Client Prol ID Exxon 7-3942, 51539 42 1300 Sampled 11/11/97 <br /> 3488 Mt Diablo Blvd Ste B100 Sample Descnpt MW9 Received 11/12/97 <br /> Lafayette, <br /> 1/12/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 11/21/97 <br /> Attention Chrlsta Marting Lab Number 9711732-05 Reported 12102f97 <br /> C Batch Number MS112197MTBEF3A <br /> strtJment ID F3 <br /> Oxygenate Compounds (EPA 8260) <br />`Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> IEthanol 625 N D <br /> t-Butanol 125 N D <br /> Methyl t-Butyl Ether (MTBE) 25 184 <br /> Di-Isopropyl Ether (DIPE) 25 N D <br />'Ethyl t-Butyl Ether (ETRE) 25 N D <br /> t-Amyl Methyl Ether (TAME) 25 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 86 <br />�a <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> LEQUOIA ANALYTICAL - ELAP #1210 <br /> 1V-1 <br /> eerd <br /> ctM Herling 7 <br /> anager Page <br />