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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 /> Analytical 819 Straker Avenue Swte 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Pacific Environmental Group Client Prol ID 311-174 1A/BP #5447,Stockton Sampled 02/13/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript PP-5 Received 02/17/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/24/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/25/98 <br />' Attention Joe Muzzio Lab Number_ 9802686-11 Reported 03J30f98 <br /> OC Batch Number GCO22498BTEXEXB <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 1 0 14 <br /> Methyl t-Butyl Ether 0 025 023 <br />' Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br />' Chromatogram Pattern <br /> Weathered Gas >C8 <br /> Surrogates Control Limits % % Recovery <br /> rifl uorotoluene 70 130 91 <br /> I*-Bromofluorobenzene <br /> 60 140 106 <br /> 1 <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of deteotion <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 1 <br />' Tod Granicher <br /> Pro)ect Manager Page 22 <br />