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5 <br /> 6 21 February 1997 <br /> AGE-NC Project No 95-0130 <br /> Page 4 of 4 <br /> 42 RECOMMENDATIONS <br /> Based on the probability of an off-site source of hydrocarbons, further delineation of the plume should <br /> be performed in the up-gradient direction We recommend the installation of two additional <br /> monitoring wells on or adjacent to the former Wells Fargo Bank property <br /> A Remedial Action Work Plan will be submitted to the PHS-EHD for a soil vapor extraction system <br /> in the area of the highest observed hydrocarbon concentrations Upon i egulatory approval, <br /> installation of the remediation system should commence <br /> Vapor extraction wells VW-1 through VW-3 should be utilized for characterization of ground water <br /> conditions in the "core" area <br /> rhe next quarterly monitoring and sampling is scheduled for April 1997 <br /> 50. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based upon <br /> analytical results provided by an independent laboratory Evaluations of the geologic/hydrogeologic <br /> conditions at the site for the purpose of this investigation were made from a limited number of <br /> available data points (i e borings, monitoring wells), and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or implied, is made as to the professional <br /> recommendations contained in this report <br /> 61 <br />