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Sequoia 6O Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 4D <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)9M-9600 FAX(925)989-9673 <br /> v� Analytical 829 Striker Avenue,Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 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 /> of <br /> Delta Environmental Client Prod ID Exxon 7-3708, D093-809 Sampled 03/05/99 <br /> 3164 Gold Camp Drive, #200 Sample Descrlpt MW-4 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 9903428-04 Reported 03J18199 <br /> QC Batch Number GC031599STEX31A <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 12 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 98 <br /> 0 <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> A Plchette <br /> 015rect Manager Page 5 <br />