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' Sequoia 680 Chesapeake Drive 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 /> 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/5447,Stockton Sampled 02/04/98 <br />' 2025 Gateway Place, Suite 440 Sample Descript NE-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 9802975-01 deported 02j20J98 <br />' OC Batch Number GCO21898BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />' Analyte Detection Limit Sample Results <br /> mg/KJ mg/K9 <br />' TPPH as Gas 1 0 N D <br /> Methyl t-Butyl Ether 0 025 35 <br /> Benzene 00050 <br />' Toluene 0 0050 N D <br /> lND <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 81 <br /> 4-Bromofluorobenzene 60 140 81 <br /> 10) <br /> I <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL FLAP #1210 <br /> Granicher <br /> Project Manager Page 2 <br />