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Sequoia 680 Chesapeake Dnve Redwood Gry CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut 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 /> t <br /> EA Engineering Science &Tech Client Pro) ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descrlpt MW7 Received 03/04/98 <br />'Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/11/98 <br /> Attention Christa Marting Lab Number 9803305-06 Reported 03131198 <br /> C Batch Number MS031198MTBEH6A <br /> istrument ID H6 <br /> Oxygenate Compounds (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 N D <br /> Di-lsopropyl Ether (DIPS) 20 N D <br />�Ethyl t-Butyl Ether (ETRE) 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 /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP 41210 <br /> 1W—Vff <br /> arc Herling <br /> ect Manager <br /> Page 11 <br />