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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 rAX(916)921-010 0 <br />' 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> EA Engineering Science&Tech Client Prod ID Exxon 7-3942, 5153942 1300 Sampled 11/18/98 <br />' 3468 Mt Diablo Blvd Ste B100 Sample Descript MW5 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- 9811D70-04 Reported 12J03J98 <br />' OC Batch Number'GC112798BTEXUA µ <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 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) <br /> Pattern 0 50 N D <br />' Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 94 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> IS EQUOJA ANALYTICAL - ELAP #1210 <br /> 1 /�:��' ' ad <br /> l <br /> 1 Mel Shin <br /> ect Manager <br /> Page 4 <br />