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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (5 10) 988 9600 FAX(510) 938 9673 <br /> JOW Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science &Tech Client Prof ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descnpt TB Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/14/98 <br /> Attention Christa Matting Lab Number_ 9803307-24 Reported 03J3)198 <br /> C Batch Number GC031493BTEX17Atstrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> lSurrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 106 <br /> Anaiytes reported as N D were not present above the stated itmlt of detection <br /> IEQUOIAANALYTICA - ELAP #1210 <br /> Z- <br /> rd <br /> Herling <br /> ct Manager Pae t t <br /> 9 <br />