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r Sequoia680 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 /> JW <br /> lll Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Pacific Environmental Group Client Proj ID 311-174 1A/8P 5447, Stockton Sampled 02/04/98 <br /> r2025 Gateway Place, Suite 440 Sample Descrlpt GT1-B Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/06/98 <br /> Analysts Method 8015Mod/8020 Analyzed 02/06/98 <br /> Attention Jessica Nelllgan Lab Number 9802211-04 Reported 03J30198 <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/Kg mg/Kg <br />' TPPH as Gas 50 63 <br /> Methyl t-Butyl Ether 012 20 <br /> Benzene 0 025 N D <br /> Toluene 0 025 070 <br />' Ethyl Benzene 0 025 N D <br /> Xylenes (Total) 0 025 N D <br /> Chromatogram Pattern GAS <br /> Gas& Unidentified HC + >C10 <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 93 <br /> 4-Bromofluorobenzene 60 140 28 Q <br /> I <br /> r <br /> 1 <br /> I <br /> r <br /> Analytes reported as N D were not present above the stated limit of detection <br /> rSEQUOIA ANALYTICAL - ELAP #1210 <br /> r <br /> Granicher <br /> lett Manager Page 8 <br /> r <br />