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28 November 2001 <br /> AGE-NC Project No. 96-0229 <br /> Page 6 of 6 <br /> 4.0. RECOMMENDATIONS <br /> Based upon the CPT investigation results during the 3rd quarter 2001, AGE recommends: <br /> ,w • Continued quarterly ground water monitoring; the next quarterly ground water monitoring <br /> event is tentatively scheduled for December 2001. <br /> • Conduct ground water pump testing at the site to obtain general aquifer characteristics such <br /> as hydraulic conductivity,transmissivity, storativity and drawdown at various pumping rates. <br /> Results of the pump test would be utilized to estimate a radius of influence for the zone of <br /> capture of dissolved petroleum hydrocarbons and to evaluate the feasibility of ground water <br /> extraction as a remedial option. <br /> • Install and continuously operate a ground water extraction system (interim remediation) in <br /> the area of MW-1 and MW-2 to inhibit further off-site migration of the fuel-impacted ground <br /> water plume. <br /> %W Installation of additional deep-screened ground water monitoring wells based on the findings <br /> of the existing shallow ground water monitoring wells and CPT soil borings; the screen <br /> intervals for the deep-screened monitoring wells will be placed to define and monitor the <br /> ... -..,Nor vertical extent of the ground water plume in each informal hydrologic unit. <br /> 5.0. 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 mainly <br /> upon analytical results provided by an independent laboratory. Evaluations of the geologic/hydro- <br /> geologic conditions at the site for the purpose of this investigation are made from a limited number <br /> of available data points (CPT data and ground water samples), and subsurface conditions may vary <br /> away from these data points. No other warranty,expressed or implied, is made as to the professional <br /> recommendations contained in this report. <br /> V <br /> iw <br /> +� Advanced GeoEnvironmental,Inc. <br /> it <br />