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alAnalytical <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wget Lane Walnut Cretk CA 94598 (5t0) 988 9600 FAX(510) 988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX (916) 921 0100 <br /> 6 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3488 Mt Diablo Blvd Ste B100 Sample Descrlpt UVB-MW2 Received 03/0€/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/13/98 <br /> Attention Chrlsta Marting Lab Number 9803307-22 Reported 03131198 <br /> C Batch Number GC031398BTEX03A - <br /> nstrument ID 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 2000 12000 <br /> Methyl t-Butyl Ether 100 N D <br /> Benzene 20 2200 <br /> Toluene 20 190 <br /> Ethyl Benzene 20 N D <br /> Xylenes (Total) 20 1300 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 110 <br /> Analytes reported as N D were not present above the stated limit of detection <br />�ELUQIA ANALYTICELAP #1210 <br /> and <br /> Herlm <br /> Fect Manager Page 8 <br /> { <br />