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Sequoia 680 Chesapeake D,-,, Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Cane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1 9600 FAX(916)921 0100 <br /> Analytical 1455 MCDoweil Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> ,Delta Environmental _ Client Prol ID Exxon 7-3708, D093-809 Sampled 10/05/98 <br /> 3164 Gold Camp Drive, #200 Sample Descript MW-8 Received 10/05/98 <br /> Rancho Cordova, CA 95670 Matrix LIQUID <br /> _ <br /> Attention JimBrownell Analysis Method 8015Mod/8020 Analyzed 10/08/98 <br /> Lab Number 9810472-08 Reported 10J14j98 <br /> .tixrs:t <br /> QC Batch Number GC100898BTEX17A - - _ <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 50 N D <br /> Methyl t-Butyl Ether 25 22 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 104 <br /> Analytes reported as N D were not present above the stated IIrr11t of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> IFei Shin <br /> Manager <br /> Page 8 <br />