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1 <br /> Sequoia 680 Chesapeake Dave Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 h Wiget Fane Walnut Creek CA 94598 (5l0) 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 7-3942, 5153942 1300 Sampled 08/08/96 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW9 Received 08/09/96 <br /> Lafayette CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/18/96 <br /> Attention Tracy Faulkner _ Lab Number 9608581-06 Reported 08/22196 <br /> OC Batch Number GC081896BTEX174 <br /> Instrument ID GCHP17 <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 1000 2700 <br /> Methyl t-Butyl Ether 50 230 <br /> Benzene 10 510 <br /> Toluene 10 N D <br /> Ethyl Benzene 10 88 <br /> Xylenes (Total) 10 260 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 107 <br /> Analytes reported as N D were not present above the stated Ilmit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Kevin Follett <br /> Project Manager page 6 <br />