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10 November 1999 AGE-NC Pro Jct No. 98-0433 LPaae 9 of I3 Moniloring Well Soil Borings • TPH-g was detected in one soil sample from soil boring MW-1 at a depth of 25 feet bs- at a concentration of 420 mg/kg: B`I"EX was also detected in this soil sample. • NT BE' was detected in two of the soil samples collected from the well soil borings. ' Concentrations in samples MWI-15 and MWI-30 were 1.5 nig/kg and 0.32 mg/kg, as quantified by EPA method 8020. Concentrations in samples`1V"VI-15, M.WI-25 and MW1- 30 were 1;800 /,q)/kg, 830 Etg/kg and 340 ,ug/kg, respectively, as quantified by EPA method ' 8260. • 'TPI-I-d was detected in three of the soil samples collected fi-orn soil boring MW-I at 15 feet., 25. feet and 30 'fect bsg at concentrations of 1.5 mg/kg, 3,000 ing/kg and 4.9 rng/kw; ' respectively. 1. Laboratory results of soil samples analyzed for petroleum ]Wdrocarbons arae summarised in-Fable 1 . The laboratory reports (MAI Laboratory -11) 17920 to 17931), quality assurance and quality control. .(QA/QC) reports and chains-of:.-custody are included in Appendix E. t4.3. PHYSICOCHEMICAL:, AND MICRO-13 ENUNIERA'TION Soil,lnalysis Analytical results of soil sam Ples submiaed for physicochemical analysis and microbiological 4 L enumeration indicate that there were no measurable petroleum bio-degrading mit.robe activity at the site. The lack of biodegrading bacteria may be due to the presence of biotoxic compounds ill the subsurface at the site; such as metals; caustic materials (salts) or pesticides. Adequate concentrations of necessary nutrients for microbe grox\,th and nlnlnTial Sustenance were present In the soil at the sits:,, ' however the pl-I of the soils analyzed, were above the optimal ranges foi- microbial grov th. The microbiological laboratory report (A. Keith Kaufman z•eport dated 113 Josie 1999) and chain-ot'- custodv form are included in Appendix F. Ground i'Vuier:,4nalvsis l A watcr sample fioin well Ial`V-1 was anal}zed for bio-enumeration and physicochemical ' characterization by A. Keitli Kaiifnlan, 11-1.5. File water sample was found to have concentralions of inorganic components sul:licicrit.to support Adremced CruEavironincnSal,inc..