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' Sequoia 680 Chesapeake Drive Redwood Cory CA 94063 (650)364 9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek.C k 94598 (925)988 9600 FAX(9Z5)988 9673 <br /> fllll� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br />' 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 79Z-1865 FAX(707)792-034Z <br /> IPEA Engineering Science &Tech Client Prot ID Exxon 7-3942, 5153942 1300 Sampled 1-1-/1-8—/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript RW1 Received 11/19/98 <br />' Lafayette, CA 94549 Matrix LIQUID - <br /> Analysis Method 8015Mod/8020 Analyzed 11/27/98 <br /> Attention Christa Marling Lab Number 9811D70-17 Reported 12/03198 <br /> QC Batch Number-GC112798BTEX17A - - <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 1000 8200 <br /> Methyl t-Butyl Ether 50 90 <br /> Benzene 10 250 <br /> Toluene 10 840 <br /> Ethyl Benzene 10 520 <br /> Xylenes (Total) 10 1100 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 96 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> PEQUOIA ANALYTICAL - ELAP #1210 <br /> Mel Mel Shin <br /> ct Manager <br /> Page 17 <br /> fid' <br />