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Sequoia 680 Chesapeake Dave 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 /> W40 <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 MW8 Received 08/09/96 <br /> Lafayette CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/19/96 <br />' Attention Tracy Faulkner Lab Number 9608581-05 Reported 08122196 <br /> QC Batch Number GC081996STEX02A <br /> Instrument ID GCHP02 <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 5000 46000 <br /> Methyl t-Butyl Ether 250 N D <br /> Benzene 50 200 <br />' Toluene 50 2700 <br /> Ethyl Benzene 50 3300 <br /> Xylenes (Total) 50 13000 <br /> Chromatogram Pattern Gas <br /> tSurrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 100 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> Kev Follett <br /> Project Manager Page 5 <br />