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Sequoia 680 Chesapeake Dnvc 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 /> frilly Analytical 819 Striker Avenue Suitc 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 02/04/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript SP2-(A-D)comp 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 Nelligan Lab Number 9802209-02 Reported 02110198 <br /> QC Batch Number GCO20698BTEXEXA <br /> Instrument ID GCHP22 <br />' Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limn Sample Results <br /> m9/K9 m9/K9 <br /> TPPH as Gas 0 7 1 <br /> Methyl t-Butyl Ether 1 1 025 031 <br /> Benzene 00050 0 012 <br /> 1 Toluene 00050 0 013 <br /> Ethyl Benzene 00050 0 012 <br /> Xylenes (Total) 0 097 <br /> Chromatogram 00050 Pattern GAS <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 98 <br /> 4-Bromofluorobenzene 60 140 97 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> d Granicher <br /> Project Manager Page 8 <br /> I <br />