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Sequoia <br /> 680 Chesapeake Dnve Redwood Gty,CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94.598 (SIO) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> r� <br /> Ground Zero Analysis, Inc _ Client Prod 1Dµ Pestana Reeve's Exxon, 95-036 Sampled 07/11/97 <br /> 2291 West March Lane, St 127D Sample Descript PRE HB-9 6 5' Received 07/14/97 , <br /> Stockton, CA 95207 Matrix SOLID Extracted 07/16/97 <br /> ' Analysis Method 8015Mod/8020 Analyzed 07/18/97 <br /> Attention John Lane_ Lab Number 9707705-02 _ Reported 07j23197 <br /> OC Batch Number GC071697BTEXEXA <br /> Instrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 N D <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 010 <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Tnfluorotoluene 70 130 90 <br /> 4-Bromofluorobenzene 60 140 83 <br /> 0 <br /> Analytes reported as w re not present above the stated limit of detection <br /> SEQ OI A ICAL - ELAP #1210 <br /> gy her <br /> Project Manager Page 3 <br />