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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 Prol ID 311-174 1A/BP 5447, Stockton Sampled 02/04/98 <br />' 2025 Gateway Place, Suite 440 Sample Descript DT-2 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 9802211-02 Reported 03f30198 <br /> QC Batch Number GCO20698BTEXEXA <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />' Analyte Detection Limit Sample Results <br /> mg/K9 mg/Kg <br /> TPPH as Gas 1 0 N D <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br />' Ethyl Benzene 00050 N D <br /> Xylenes (Tota! N D <br /> Chromatogram 00050 Pattern <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 86 <br /> 4-Bromofluorobenzene 60 140 90 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />'SEQUOIA ANALYTICAL - ELAP 01210 <br /> Granicher <br /> sect Manager page 5 <br />