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' Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 del Wtgct Lane Walnut Creek CA 94598 (5i0) 988 96W FAX(510)988 9673 <br /> Analytical 819 Stnkcr Avenue Suite 8 Saeramcntn CA 95834 (916) 92 i 9600 FAX(916)921 0100 <br /> EA Engineering Science &Tech Client Proj ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW12 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/11/98 <br /> „ Attention_Chnsta Marting " Lab Number 9803306-_11 _ Reported 03f31 f98 <br /> C Batch Number MS031198MTBEH6A <br /> strument 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-Isopropyl Ether (DIPE) 20 N D <br />�Ethyl 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 87 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> L <br /> (--kw <br /> r Herling <br /> ct Manager Page 3 <br />