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r Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Wal nut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792 1865 FAX(707)792-0342 <br /> EA Engineering Science &Tech Client Proj ID Exxon 7-3942, 5153942 1300 _ WSampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript UVB-MW2 Received 05/21/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 05/27/98 <br /> Attention Christa_Martmg Lab Number 9805E43-22 Reported 06J1 0/98 <br /> C Batch Number MS052698MTBEH6B <br /> nstrument ID H6 <br /> Methyl t-Butyl Ether (MTBE) <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Methyl t-Butyl Ether 14 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 102 <br /> knalytes reported as N D were not present above the stated limit of detection <br /> 1EQUOJA ANALYTICAL - ELAP #1210 <br /> rd Herling <br /> ct Manager <br /> Page 5 <br />