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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> Sequoia 404 ` 1Uiger Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Straker Avenue SuiteB 5acramento CA 95634 (916)921 9600 FAX(916)9Z1-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792-0342 <br /> EA Engineering Science &7ech Client Proj ID Exxon 7-3942, 5153942 1300 Sampled 08/19/98 <br /> 3468 Mt Diablo Blvd Ste 13100 Sample Descrlpt MW10 Received 08/20/98 <br /> Lafayette, CA 94,549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 08/28/98 <br /> Attention Chnsta Marting Lab Number 980SC95-09 Reported 09104198 <br /> C Batch Number MS082798MTBEH6B <br /> Instrument ID H6 <br /> Methyl t-Butyl Ether (MTBE) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> IMethyl t-Butyl Ether 2 0 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 94 <br /> I <br /> ,nalytes reported as N D were not present above the stated limit of detection <br /> I;EQUOIA ANALYTICAL - ELAP #1210 <br /> Herling <br /> Page 17 <br /> I'r t Manager <br />