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Sequoia 680 Chesapeake Drive Redwood City 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 /> EA Engineering Science&Tech Client Prof 10 Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste 13100 Sample Descript RW1 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 9803306-13 __ ^ _ Reported 03j31 j )8 <br />�CBatch Number MS031198MTBEH6A <br /> n - _ - - - --- ----- - _ - _ -- - <br /> strument f D H6 <br /> Oxygenate Compounds (EPA 8260) <br /> I <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br />' Ethanol 8400 N D <br /> t-Butanol 1700 N D <br /> Methyl t-Butyl Ether (MTBE) 33 N D <br /> Di-Isopropyl Ether (DIPE) 33 N D <br /> Ethyl t-Butyl Ether (ETBE) 33 N D <br />�1 t-Amyl Methyl Ether (TAME) 33 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 94 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> REQUOIA ANALYTICAL - ELAP 01210 <br /> 1 KT-.1—V <br /> P,rd erling <br /> ct Manager Page 7 <br />