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Sequoia 630 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 (510) 988 9673 <br /> alao' 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 8100 Sample Descript MW2 Received 06/09/96 <br /> Lafayette CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/20/96 <br />' Attention Tracy Faulkner Lab Number 9608581-03 Reported 08122196 <br /> CC Batch Number 96082096BTEX03A <br /> Instrument ID GCHP03 <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 50 490 <br /> Methyl t-Butyl Ether 25 68 <br /> Benzene 050 19 <br />' Toluene 050 N D <br /> Ethyl Benzene 050 41 <br /> Xylenes (Total) 050 11 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> T rift u orotoluene 70 130 137 Q <br /> i <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Kevin Follett <br /> Project Manager Page 3 <br /> i <br />