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Ialw' AnalyticaSequoia 680Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N W,get Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> l819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> s <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-1 Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/06/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/10/98 <br /> Attention Jessica Nelligan Lab Number 9802211-01 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/K9 <br />' TPPH as Gas 25 110 <br /> Methyl t-Butyl Ether 062 1 7 <br /> Benzene 012 N D <br /> Toluene _ 012 072 <br />' Ethyl Benzene 0 12 N D <br /> Xylenes (Total) 012 N D <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 89 <br /> 4-Bromofluorobenzene 60 140 50 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated I mrt of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> Granicher <br /> lect Manager Page 3 <br />