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1 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> 1 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> i <br /> 1 <br /> 1 Paef tc Environmental Group Client Prod ID 311-174 1A/BP #5447,Stockton Sampled 02/13/98 - <br /> 2025 Gateway Place, Suite 440 Sample Descript PD-5 Received 02/17/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/24/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/26/98 <br /> 1 Attention Joe Muzzio Lab Number 9802B86-05 Reported 03130198 <br /> OC Batch Number GCO22498bTEXEXB <br /> Instrument ID GCHP01 <br /> 1Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/K9 <br />' TPPH as Gas 1 0 84 <br /> Methyl t-Butyl Ether 0 025 024 <br /> Benzene 00050 N D <br />' Toluene 00050 00060 <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 029 <br /> Chromatogram Pattern <br />' Weathered Gas C6-C 12 <br /> Surrogates Control Limits % % Recovery <br /> Trlf!uorotoluene 70 130 81 <br /> lie-Bromofluorobenzene 60 140 110 <br /> 1 <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> I <br /> d Grantcher <br />' Project Manager Page 7 <br />