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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> 1 404N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> �III� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Pacific Environmental Group Client Proj ID 311-174 1A/BP #5447,Stockton Sampled 02/13/98 <br /> I2025 Gateway Place, Suite 440 Sample Descript PD-1 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 9802686-01 Reported 03130198 <br /> QC Batch Number GCO22498BTEXEXB - - <br /> Instrument ID GCHP22 <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 1 5 <br /> Methyl t-Butyl Ether 0 025 N D <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 /> IUnidentified HC >Ci 0 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 4-Bromofluorobenzene 60 140 94 <br /> Analytes reported as 110 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - EtAP 41210 <br /> 11111111111h, 2 1 &I <br /> d Granicher <br /> Project Manager Page 2 <br /> I <br />