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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> a,40, Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> EA Engineering Science&Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 488 Mt Diablo Blvd Ste 13100 Sample Descnpt V3 Received 03/04/98 <br /> fafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/15/98 <br /> Attention Chnsta Marting Lab Number- 9803307-20 Reported 03f31J98 <br /> C Batch Number GC031598BTEX17A <br /> strument ID GCHP17 �- <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Fnalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> kTPPH as Gas 5000 82000 <br /> ethyl t-Butyl Ether 250 N D <br /> enzene 50 120 <br /> Toluene 50 2300 <br /> Wthyl Benzene 50 4000 <br /> ylenes (Total) 50 18000 <br /> hromatogram Pattern Gas <br /> arrogates Control Limits % % Recove <br /> rifluorotoluene 70 130 103 <br /> r <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />&QUOIA ANALYTICA - ELAP #1210 <br /> rd Herling <br /> ct Manager Page 4 <br /> r <br />