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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science &Tech Client Prof ID Exxon 7-3942, 51539 42 1300 Sampled 08/26/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW10 Received 08/27/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/30/97 <br /> Attention Chrlsta Marting_ _ Lab Number 970.8E4_5-05 _ Reported 09104J97 <br /> rInstrument <br /> C Batch Number GC083097BTEX07A ID GCHP07 <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 63 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 <br /> 21 <br /> Toluene 050 1 4 <br /> Ethyl Benzene 050 3 7 <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trdluorotoluene 70 130 91 <br /> lie <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> VOU01A ANALYTICAL - ELAP 41210 <br /> 1,0— <br /> Herling <br /> it Manager Page 3 <br />