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Sequoia 600 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 4D404 N Wiget Lane walnut Creek U 94598 (925)988-%w FAX(925)988-9673 <br /> Analytical 819 Striker Avenue.Suite 8 Petaluma.C 9 95834 (707)921-9600 FAX(916)921-0100 <br /> 1455 McDowelE 81vd North Ste D Petaluma.U 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> .�»» <br /> Delta Environmental Client Prol ID Exxon 7-3708, D493-809 Sampled 03/05/99 <br /> 3164 Gold Camp Drive, #200 Sample Descript MW-5 Received 03/05/99 <br /> Rancho Cordova CA 95670 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/15/99 <br /> Attention Jim Brownell Lab Number 9903428-05 Reported 03/18/99 <br /> QC Batch Number GC031599BTaX31A <br /> Instrument ID GCHP31 <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 N D <br /> Methyl t-Butyl Ether 25 88 <br /> Benzene 050 N D <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 83 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> f <br /> A PEchette <br /> ct Manager Page 6 <br />