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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415)364-9233 <br /> �Y Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> X1,7 Analytical 819 Striker Avenue Susie 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)911 0100 <br /> EA Engineering Science&Tech Client Prof ID Exxon 7-3942, 5153942 1300 Sampled 11/04/96 ~ <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript SW2 Received 11/05/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/08/96 <br /> Attention Tracy Faulkner Lab Number 9611209-17 Reported IJ12J96 <br /> QC Batch Number GC110896BTEX20A <br /> Instrument ID GCHP20 <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 125 320 <br /> Methyl t-Butyl Ether 62 N D <br /> Benzene 1 2 110 <br /> Toluene 12 N D <br /> Ethyl Benzene 12 N D <br /> Xylenes (Total) 12 2 0 <br /> Chromatogram Pattern Gas <br />' Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 80 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 1 <br /> F <br /> m Follett <br /> Project Manager Page 17 <br />