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Sequoia 680 Chesapeake D,,,, Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiger Lane Walnut Creek,CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)79Z-0342 <br /> EA Engineering Science &Tech Client Pro) ID Exxon 7-3942, 5153942 1300 Sampled 11%18/98 <br /> 3468 Mt Diablo Blvd Ste 13100 Sample Descrlpt P2 Received 11/19/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/27/98 - <br /> Attention Christa Marting Lab Number 9811 D70-16 Reported 12JO3198 " <br />'QC Batch Number GC1 12798BTEX1 7P <br /> Instrument ID GCHP17 <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 500 1100 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 5 0 20 <br /> Toluene 50 N D <br /> Ethyl Benzene 5 0 10 <br /> Xylenes (Total) <br /> Pattern 5 0 GAS <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 85 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL - ELAP #1210 <br /> PMein <br /> ct Manager <br /> Page lti <br />