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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) 998 9673 <br /> foll>7 Analytical 819 Striker Avenue Suitt a 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 GT3-B Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/06/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/09/98 <br /> Attention Jessica Nelligan Lab Number 9802211-08 Reported 03f30J98 <br />' OC Batch Number GCO20698BTEXEXA <br /> Instrument ID GCHP22 <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 _ 1000 3000 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 5 0 N D <br /> Toluene 5 0 17 <br />' Ethyl Benzene 5 0 30 <br /> Xylenes (Total) 5 0 230 <br /> Chromatogram Pattern GAS <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 98 <br /> 4-Bromofluorobenzene 60 140 20 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated(Emit of detection <br />' SEQUOIA ANALYTICAL - ELAP #1210 <br /> 1 <br /> Granicher <br /> ject Manager Page 12 <br />