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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-960o FAX(916)921 0100 <br /> 1455 MCDoweil 8hrd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> f'EA Engineering Science &Tech Cllent Proj ID Exxon 7-3942, 5153942 1300 Sampled 11/18/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript RW2 Received 11/19/98 <br /> I Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/27/98 <br /> Attention Chnsta Marting- Lab Number 9811 D70-18 Reported 12J03/98 <br /> QC Batc� Number GCI 12798BTEX17A - <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 5300 <br /> Methyl t-Butyl Ether 50 95 <br /> Benzene 10 <br /> 110 <br /> Toluene 10 130 <br /> Ethyl Benzene 10 280 <br /> Xylenes (Total) 510 <br /> Chromatogram 10 Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 94 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> VEQUOIA ANALYTICAL - ELAP #1210 <br /> ei Mei Shin <br /> ect Manager Page 1$ <br /> 1 <br />