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t <br /> Sequoia 680 Chesapeake Dnve 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 Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 otoo <br />' - Pacific Environmental Group -Client Proj ID 311-174-1 A/BP #5447,Stockton Sampled 02/13/98 <br /> 2025 Gateway Place, Suite 440 Sample Descnpt PD-1 Received 02/17/98 <br /> San.lose, CA 95110 Matrix SOLID Extracted 02/24/98 <br /> _ Analysis Method 8015Mod/8020 Analyzed 02/25/98 <br />' <br /> , Attention Joe Muzzio Lab Number 9802686-01 Reported 03130198 <br /> QC Batch Number GCO22498BTEXEXB <br /> Instrument 1D GCHP22 <br />' Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/KJ mg/K9 <br />' TPPH as Gas _ 1 0 1 5 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> IToluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Unidentified HC >C10 <br /> Surrogates Control Limits % <br /> /o Recovery <br /> Trifluorotoluene 70 130 95 <br /> 4-Bromofluorobenzene 60 140 94 -_ <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> I <br /> od Granlcl <br /> Project Manager Page 2 <br /> I <br />