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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 Walnut Creek.CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (9t6)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 Prol ID-� Exxon 7-3942, 5153942 1300 Sampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descnpt V2 - Received 05/21/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 05/26/98 <br /> Attention Christa Marting Lab Number 9805E41-19 Reported 06J1 D/98 <br /> C Batch Number MS052698MTBEH6B - - - - - -- - <br /> rtstrument ID Hfi <br /> Methyl t-Butyl Ether (MTBE) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Methyl t-Butyl Ether 100 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 106 <br /> analytes reported as N D were not present above the stated limit of detection <br />[EQUOIA ANALYTICAL - ELAP #1210 <br /> rd Herling <br /> ct Manager <br /> Page 37 <br />