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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9Z33 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 8!9 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-010 0 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792-0342 <br /> EA Engineering Science &Tech Client Pro) ID Exxon 7-3942, 5153942 1300 Sampled 11/18/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW3 Received 11/19/98 <br />' Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/6020 Analyzed 11/27/98 <br /> Attention Chnsta Marting Lab Number 9811 D70-02 Reported 12f03j98 <br />' QC Batch Number GC112798BTEX02A <br /> Instrument ID GCHP02 <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 2 5 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xyienes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limrts % % Recovery <br /> Trifluorotoluene 70 130 8$ <br /> Analytes reported as N D were not present above the stated limit of detection <br />'SEQUOIA ANALYTICAL - ELAP #1210 <br /> 1112"l,L < <br /> i Mel Shin <br /> ect Manager Page 2 <br />