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In accordance with option #3 of the November 1993 PHS/EHD communication, <br /> ' additional borings have been drilled in the vicinity of MW-2 to determine the extent of <br /> any residual soil contamination Although hydrocarbon vapors were evident at shallow <br /> depths in two borings, laboratory analysis of soil samples did not detect any hydrocarbons <br /> above method detection limits This confirms that excavation during 1992 successfully <br /> removed the contaminated soil. The benzene and toluene that were previously detected <br /> at low concentrations in "smear zone" samples from MW-2 have been diluted or <br /> remediated by oxygenated groundwater It is neither necessary nor possible to perform a <br /> mass-balance calculation in this case. GeoAudit recommends that the site be certified for <br /> ' unconditional closure. Monitoring wells MW-2 and MW-3 should be destroyed in <br /> accordance with PHS/EHD procedures <br /> 6.0 LIMITATIONS <br /> ' Our professional services were performed Using that degree of care and skill ordinarily <br /> exercised by environmental consultants practicing in this or similar Iocalities The findings <br /> were based upon analytical results provided by an independent laboratory Evaluations of <br /> ' the geologic/hydrogeologic conditions at the site for the purpose of this investigation are <br /> made from a limited number of available data points (i a monitoring wells) and <br /> subsurface conditions may vary away from these data points No other warranty, <br /> ' expressed or implied, is made as to the professional recommendations contained in this <br /> report <br /> 1 <br /> I <br /> 14 <br />