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Sequoia <br /> 7 O* 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> J i la 1 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Analytical <br /> EA Engineering Science&Tech Client Proj ID Exxon 7-3942, 51539 42 1300 Sampled 11/11/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript IW1 Received 11/12/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/22/97 <br /> Attention Chnsta_Marting Lab Number 9711732-01 Reported 12JO2197 <br /> C Batch Number Gd112297BTEX2IA <br /> nstrument ID GCHP21 <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 221 D <br /> Methyl t-Butyl Ether 50 N D <br /> Benzene 10 30 <br /> Toluene 10 N D <br /> Ethyl Benzene 10 160 <br /> Xylenes (Total) 10 130 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 92 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> kEOU01A ANALYTICAL - ELAP 41210 <br /> rd Herling i <br /> Page <br /> ct Manager <br />