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3 <br />' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 {510} 988 9500 FAX (510)968 9673 <br />' 11OW 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 />' 2025 Gateway Place, Suite 440 Sample Descript PD-4@12 Received 02/17/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/19/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/19/98 <br /> Attention Joe Muzzio _ Lab Number 9802947-01 Reported 02f19198 <br />' QC Batch Number GCO21998BTEXEXA <br /> Instrument ED GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />' Analyte Detection Lima Sample Results <br /> mg/K9 mg/Kg <br />' TPPH as Gas 100 240 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br />' Toluene 0 50 N D <br /> Ethyl Benzene 0 50 0 95 <br /> Xylenes (Total) 0 50 12 <br /> Chromatogram Pattern <br />' Unidentified HC >C10 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 86 <br /> p4-Bromofluorobenzene 60 140 3 Q - <br /> I <br /> I <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated lml of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> I _ <br /> d Granicher <br /> IProject Manager Page 2 <br /> I <br />