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680 Chesapeake peake Drive Redwood City, CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> 404 N Wiget[_ane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Sinker Avenuc Suite 8 Sacramento CA 95834 (916) 92t 9600 FAX (916)921 0100 <br /> PaCifiC Environmental Group _ Client Pral ID 311-174 1A/BP-#5447,Stockton Sampled 02/13/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript PD-5 Received D2/17/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/24/98 <br /> Attention Joe Muzzio <br /> Analysis Method 8015Mod/8020 Analyzed 02/26/98 <br />' Lab Number 9802B86-05 Reported_ 03J30J98 <br /> = <br /> QC Batch Number GCO22498BTEXEXB - <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 10 <br /> Methyl t-Butyl Ether 0 025 84 <br /> Benzene' 00050 0 24 Toluene 0 0050 0 N D <br /> Ethyl Benzene 0 0050 0060 <br /> Xylenes (Total) N D <br /> Chromatogram Pattern 00050 - 0 029 <br /> tWeathered Gas C6-C12 <br /> Surrogates Control Limits % Recovery <br /> Tr,fluorotoluene % R70 130 <br /> 4-Bromofluorobenzene 60 81 <br /> 140 110 <br /> t <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> I <br />�*d Granicher <br /> Project Manager <br /> Page 7 <br /> I <br />