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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 968 9600 FAX(510) 988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95934 (916) 921 9600 FAX (916) 921 0100 <br /> Pacific Environmental Group Client Prol ID 311-174 1A/BP 5447, Stockton Sampled 02/04/98 <br />' 2025 Gateway Place, Suite 440 Sample Descript GT3-C Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/09/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/09/98 <br /> Attention Jessica Nelligan Lab Number 9802211-09 Reported 03f30198 <br />' QC Batch Number GCO20998BTEXEXA <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 24 <br /> Methyl t-Butyl Ether 0 025 40 <br /> Benzene 00050 00083 <br /> Toluene 00050 N D <br />' Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 033 <br /> Chromatogram Pattern GAS <br />' Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 94 <br /> 4-Bromofluorobenzene 60 140 121 <br /> 1 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br />' SEQUOIA ANALYTICAL - ELAP #1210 <br /> Granicher <br /> IWOJ <br /> ect Manager Page 13 <br /> 1 <br />