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i, Sequoia 680 Chesapeake Dnve Redwood Gty CA 94063 (650) 364 96W FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5t0)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9000 FAX(916)921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> Mt Diablo Blvd Ste 8100 Sample Descrlpt MW3 Received 03/04/98 <br /> 13468 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/16/98 <br /> Attention Christa Marting Lab Number_9803305-02 _ Reported_03/31198 <br />�C Batch Number GC031698STEX03A -- <br /> strument ID GCHP3 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />,Analyte Detection Limit Sample Results <br />■ ug/L ug/L <br /> tTPPH as Gas 50 N D <br /> ethyl t-Butyl Ether 25 N D <br /> enzene 050 N D <br /> Toluene 050 N D <br />=Ethyl Benzene 050 N D <br /> ylenes (Total) 050 N D <br /> hromatogram Pattern <br /> turrogates Control Limits % % Recovery <br /> rdluorotoluene 70 130 94 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> tOU01A ANALYTICAL - ELAP #1210 <br /> 2� <br /> rrd Herling <br /> ct Manager <br /> Page 4 <br />