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' Sequoia 680 Ch,:,.peakr Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Geek CA 94598 (510) 988 9600 FAX(510)988 9673 <br />' folly 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/BP #5447,Stockton Sampled 02/13/98 <br /> 2025 Gateway Place, Suite 440 Sample Descrlpt 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 />' Attention Joe Muzzlo Lab Number 9802B86-04 Reported 03f30/9$ <br /> CSC 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 0 50 N D <br />' Toluene 0 50 2 3 <br /> Ethyl Benzene 0 50 15 <br /> Xylenes (Total) 0 50 110 <br /> Chromatogram Pattern GAS <br />' Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 93 <br /> 4-Bromofluorobenzene 60 140 130 <br /> 1 <br /> I <br /> f <br /> I <br /> IAnalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Amik <br /> tr _ <br /> d Granicher <br /> Project Manager Page 5 <br /> I <br />