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' <br /> Sequoia <br /> Dia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> J q 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> falai <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br />' 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> EA Engineering Science &Tech Client Prof ID Exxon 7-0137, 5150137 1300 Sampled 07/15/98 <br />' 3468 Mt Diablo Blvd Ste 8100 Sample Descript MW-2 Received 07/22/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 07/29/98 <br /> Attention Chnsta Marting Lab Number 9807D08-02 Reported 08f03j98 <br /> OC Batch Number GC072998BTEX03A <br /> Instrument ID GCHP3 <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 0 50 <br /> Toluene N D <br /> 050 ND <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br />' Surrogates Control Limits % % Recove Trifluorotoluene 70 130 100 <br /> nalytes reported as N D were not present above the stated limit of detection <br /> I-EQUOIA ANALYTICAL - ELAP #1210 <br /> rd Herling <br /> ct Manager <br /> Page 2 <br />