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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)988 9673 <br /> 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 7-0137, 5150137 Sampled 10/16/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descnpt MW2 Received 10/17/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/18/96 <br /> Attention Tracy Faulkner Lab Number 9610A56-09 Reported 10J23196 <br />' QC Batch Number GC1 01 896BTEX02A <br /> Instrument ID GCHP2 <br />' Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 50 52 <br /> Benzene 050 N D <br /> Toluene 050 N D <br />' Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatograrn Pattern <br /> Unidentified HC C6-C8 <br />' Surrogates Control Limits% % Recove <br /> Trifluorotoluene 70 130 79 <br /> 1 <br /> 1 <br />'Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> in Follett <br /> Project Manager Page 9 - <br /> I <br />