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Sequoia 680 Chesapeake Dnvc Rcd�ood 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 /> Analytical 819 Striker 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 1 300 Sampled-03/03/98 <br /> Mt Diablo Blvd Ste 8100 Sample Descrlpt UVB-MW1 Received 03/04/98 <br /> 13468 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/15/98 <br /> Attention Chnsta Marting Lab Number 9803307-21 Reported 03f31f98 <br /> C Batch Number GC031598BTEX21 A <br /> istrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> I <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />'TPPH as Gas 50000 140000 <br /> Methyl t-Butyl Ether 2500 3200 <br /> Benzene 500 13000 <br /> Toluene 500 36000 <br /> lEthyBenzene 500 3600 <br /> ylenes (Total) 500 18000 <br /> l <br /> hromatogram Pattern Gas <br /> urrogates Control Limits % % Recovery <br /> rifluorotoluene 70 130 101 <br /> 1 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> fcrd Herling <br /> t Manager Page 6 <br /> t <br />