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Sequoia 680 Chesapeake Dnve 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 /> a,40' Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 f916) 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 GT2-13 Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/06/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/06/98 <br /> Attention Jessica Nellrgan Lab Number 9802211-06 Reported 03J30198 <br /> IQC Batch Number GCO20698BTEXEXA <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />' Analyte Detection Limrt Sample Results <br /> mg/Kg mg/Kg <br />' TPPH as Gas 100 1800 <br /> Methyl t-Butyl Ether 25 39 <br /> Benzene 050 <br /> Toluene 0 50 N D <br /> i8 <br />' Ethyl Benzene 050 8 7 <br /> Xylenes (Total) 050 65 <br /> Chromatogram Pattern GAS <br /> Gas& Unidentified HC C10 <br />' Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 99 <br /> 4-Bromofluorobenzene 60 140 50 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />' SEQUOIA ANALYTICAL - ELAP 01210 <br /> Granlcher <br /> 10i ect <br /> Manager Page 10 <br />