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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br />' filly Analytical 819 Striker Avenue Swtc 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br />' Pact#ic Environmental Group Client Proj ID 311-174 1A/BP #5447,Stockton Sampled 02/13/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript PP-3 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 />' Attention Joe Muzzio Lab Number 9802686-09 Reported 03J30198 <br /> QC 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 10 N D <br /> Methyl t-Butyl Ether 0 025 026 <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 />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 88 <br /> •4-Bromofluorobenzene 60 140 78 <br /> 1 <br /> 1 <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> in <br />' od Granicher <br /> Project Manager Page 17 <br /> 1 <br />