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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> J 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> X1117 Analytical 819 Striker Avenue Suote 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br />,EA Engineering Science&Tech Client Prol ID Exxon 7-0137, 51501 37 1300 Sampled 01/14/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW2 Received 01/15/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 01/26/98 <br /> Attention Chnsta Marting Lab Number 9801803-02 Reported 01 f 301 98 <br /> IC Batch Number GC012B98BTEX18A <br /> strum- entlD GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with 13TEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> LPPH as Gas 50 N D <br /> ethyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> ,Ethyl Benzene 0 50 N D <br /> ylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> turrogates Control Limits % % Recovery <br /> rifluorotoluene 70 130 90 <br /> 1 <br />(aiytes reported as N D were not present above the stated limit of detection <br /> QUOTA ANALYTICAL - ELAP #1210 <br /> Vjecrt Herling <br /> Manager Page 2 <br />