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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (550) 364 9600 FAX(650)364 9233 <br /> 1� 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 98a 9673 <br /> Analytical 819 Strsker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX 010 921 0100 <br /> 6 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descrnpt IW1 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/12/98 <br /> Attention Chrlsta Marting Lab Number 9803306-18 _ Reported 03/31/98__ <br /> C Batch Number MS031198MTBEH66 - <br /> nstrument 1D H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' Ethanol 1500 N D <br /> t-Butanol 290 N D <br /> Methyl t-Butyl Ether (MTBE) 59 N D <br /> DI-Isopropyl Ether (RIPE) 59 N D <br />'Ethyl t-Butyl Ether(ETBE) 59 N D <br /> t-Amyl Methyl Ether (TAME) 59 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 /> 11EQUOIA ANALYTI - ELAP #1210 <br /> rr,d HerlingcManager Page 17 <br />