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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> y 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma, CA 94954 (707)792 1865 FAX(707)792-0342 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 11/18/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descrlpt Trip Blank 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 9811D71-21 Reported 12/03198 <br /> CC Batch Number GC112798BTEX30A <br /> Instrument ID GCHP30 <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 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 98 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> VOU01A ANALYTICAL - ELAP #1210 <br /> ?iMie-i Shin <br /> ect Manager Page 2 <br />