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Seeuoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Sequoia <br /> 4114 1 13et Lac"! Walnut Creek Ck 94598 (510) 988 9600 FAX(5 t0) 988 9673 <br /> Analytical 819 Scnker Avenue Suite 8 Sacramento CA 9583.4 (916) 92t 9600 FAX(916) 921 0100 <br /> 1 <br /> EA Engineering Science & Tech Client Prol ID Exxon 7-3942/8373942 1307 Sampled 10/19/95 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript 3942 MW1 PP Received 10/20/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/24/95 <br /> Attention Tracy Faulkner Lab Number 951OF27-19 Reported 10127195_ <br /> QC Batch Number GC1 02495BTEX21 A <br /> Instrument 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 s0 210 <br /> Methyl t-Butyl Ether 2 5 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Unidentified HC <CS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> M <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1 S AN LYTICAL - ELAP *1210 <br /> 1 <br /> ggy Pen <br /> ro�ect Manager Page 19 <br /> 1 <br />