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Sequoia 680 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 /> qup Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (9 16)921 0100 <br /> Pacific Environmental Group Client Prof ID 311-174 1A/5447, Stockton Sampled 02/24/98 <br /> 2025 Gateway Place, Suite 440 Sample Descnpt SP2(A-C)comp Received 02/24/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/25/98 <br /> Analysis Method 8015Mod/8020 P. Analyzed 02/26/98 <br />' Attention Jessica Nelligan Lab Number 9802F69-02 Reported 02J26198 <br /> OC Batch Number GCO22598BTEXEXA <br /> Instrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br />' as Gas <br /> TPm9/K9 m9/K9 <br /> ZSFI 10 1 9 <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) N D <br /> Chromatogram 0D050 Pattern <br />' Weathered Gas CB-C12 <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 95 <br /> 4-Bromofluorobenzene 60 140 108 -TR <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> od Granicher <br /> Project Manager Page 4 <br /> I <br />