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r , Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiger Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker 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 /> r <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 Descript MW10 Received 11/19/98 <br /> Lafayette CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/27/98 <br /> Attention Chnsta Marting Lab Number_ 9811 D70-09 Reported 12J03J98 <br /> QC Batch Number GC112798BTEX02A - <br /> Instrument ID GCHP02 <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 060 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recove <br /> Trifluorotoluene 70 130 96 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> ISEQUOIA ANALYTICAL - ELAP #1210 <br /> el Mei Shin <br /> olect Manager Pae 9 <br /> 9 <br />