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Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)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 Prol ID Exxon 7-0137, 5150137 Sampled 10/16/96 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW6 Received 10/17/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/96 <br /> Attention Tracy Faulkner Lab Number 9610A56-04 Reported 10J23196 <br />' QC Batch Number GC102196BTEX03A <br /> Instrument ID GCHP03 <br />' Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 50 N D <br /> Benzene 0 50 2 4 <br /> Toluene 050 N D <br />' Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 108 <br /> t <br />'Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL. - ELAP #1210 <br /> rPro <br /> in Follett <br /> fect Manager Page 4 - <br />