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Se uoia680 Chesapeake Drrvc 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 />' frill>I� Analytiea1 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 oloo <br /> Pacific Environmental Group Client Proj ID 311-174 1A/5447,Stockton Sampled 02/04/98 <br />' 2025 Gateway Place, Suite 440 Sample Descript SE-20 Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/18/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/18/98 <br /> Attention J Nelligan Lab Number 9802975-03 Reported 02120/98 <br /> OC Batch Number GCO21898BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> IAnalyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 N D <br /> Methyl t-Butyl Ether 0 025 1 4 <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 90 <br /> 4-Bromofluorobenzene 60 140 91 <br /> Analytes reported as N D were not present above the stated Ilrnit W detection <br /> SEQUOIA ANALYTICAL ELAP #1210 <br /> I <br /> Granlcher <br /> Project Manager Page 6 <br /> I <br />