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r <br /> 4 j Although these three chlorinated hydrocarbons are present at levels well below state and <br /> federal action levels and hence require no further remediation, it is prudent that the <br /> continued monitoring of their concentrations be implemented to verify source removal. A <br /> second round of sample collection and analysis should be completed following removal of <br /> 3 all contaminated soil. <br /> Specific work performed during this phase of investigation included: <br /> i. Preparation of the Problem Assessment Workplan and application for monitoring <br /> i" well permits. <br /> ' 2. Drilling of four soil borings and the conversion of three of the borings to groundwater <br /> monitoring wells, MW-1, MW-2 and NMI <br /> _ I <br /> I Collection of soil samples at 5 foot intervals down to groundwater. <br /> 4. Development of the.three monitoring wells and collection of water samples. <br /> 5. C impletion of two angle borings under buried 500 gallon leaded gasoline tanks. <br /> G. Analysis of water samples for BTXE, diesel fuel and <br /> purgeable halocarbon <br /> compounds. Analysis of soil samples for BTXE,diesel fuel,purgeable halocarbons, <br /> and in the case of the angle borings, dibromoethane (EDB) and tetraethyl lead <br /> (TEL). <br /> 7. Preparation of this report. <br /> In summary, minor groundwater contamination, acknowledged in the Tank Excavation <br /> Assessment Report, as a result of over-spillage from the_underground_waste_oil_tank-has <br /> ,_ <br /> been quantified. The majority of contaminated soil has been removed for off-site disposal T <br /> and soil borings have been completed to assess the areal and vertical extent of the remaining <br /> soil contamination. <br /> ` J <br /> 2 <br /> 1 <br />