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- , Sequoia680 Chesapeake Drive 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 /> frill' Analytical 819 Striker Avenue Suite 8 SaCramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> 1 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 51539 42 1300 Sampled 08/26/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript RW2 Received 08/27/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/29/97 <br /> Attention Christa Marting Lab Number 9708E45-13 Reported 09104197 <br /> rQC Batch Number GC082997BTEX22A <br /> Instrument ID GCHP22 <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 2000 7000 <br /> Methyl t-Butyl Ether 100 110 <br /> Benzene 20 <br /> 190 <br /> Toluene 20 170 <br /> Ethyl Benzene 20 <br /> Xylenes (Total) 20 320 <br /> 450 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 93 <br /> Analytes reported as N D were not present above the stated limit of detection <br />[EQUOIA ANALYTICAL - ELAP #1210 <br /> gI� Herling <br /> I r Manager <br /> Page 11 <br />