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/ - \ Sequoia 690 Chesapeake Dnve Redwood City CA 94 06 3 (650) 364 9600 FAX(65 0)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue SULte 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 /> 13468 Mt Diablo Blvd Ste B100 Sample Descript MW9 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/17/98 <br /> Attention Christa Marting Lab Number 9803305-08 Reported 03131198 <br />�C Batch Number GC031798BTEX03A <br /> istrument 1D GCHP3 <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 50 540 <br /> Methyl t-Butyl Ether 25 60 <br /> Benzene 0 50 22 <br /> Toluene 050 N D <br /> Ethyl Benzene 050 1 5 <br /> Xylenes (Total) 050 20 <br /> Chromatogram Pattern Gas <br /> iSurrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 89 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - LAP #1210 <br /> frad Herling <br /> t Manager Page 16 <br />