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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (659)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 Pro' ID 311-174 1A/BP #5447,Stockton Sampled 02/13/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript PD-4 Received 02/17/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/24/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/25/98 <br /> - <br /> Attention-Joe Muzzio _ Lab Number 9802686-04 Reported 03f30198 <br /> OC Batch Number GCO22498BTEXEXB <br /> Instrument ID GCHP07 <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 100 1300 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 2 3 <br /> Ethyl Benzene 0 50 15 <br /> Xylenes (Total) 050 110 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trif[uorotoluene 70 130 93 <br /> 4-Bromofluorobenzene 60 140 13 Q <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> od Granicher <br /> Project Manager Page s <br />