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i <br /> 31 July 2000 <br /> AGE-NC Project No 95-0130 <br /> Page 9 of 9 <br /> • The lateral and vertical extent of the dissolved hydrocarbon plume is not known in any <br /> direction <br /> 5.0. RECOMMENDATIONS <br /> Based upon the results of the Second Quarter 2000 investigation, AGE recommends <br /> • Continued quarterly ground water monitoring, the next quarterly ground water monitoring <br /> event is tentatively scheduled for September 2000 <br /> • Continued utilization of wells VW-1B, VW-1C, VW-2A, VW-2B, VW-3A and VW-3B for <br /> characterization of ground water conditions in the "core area" <br /> • Advancement of two exploratory soil borings in the area of VW-3 and VW-2 to depths of <br /> approximately 150 feet bsg for vertical assessment of soil and ground water <br /> • Immediately proceed with ground water monitoring well installations as outlined in the Work <br /> Plan Addendum - June 1998, dated 23 June 1998 and approved by the PHS-EHD by letter <br /> dated 18 August 1999 <br /> • Proceed with a ground water pump testing to obtain general aquifer characteristics such as <br /> hydraulic conductivity, transmissivity, storativlty 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 <br /> • Install and continuously operate a ground water extraction system (interim remediation) in <br /> the area of VW-3 to inhibit further off-site migration of the fuel impacted-ground water <br /> plume <br /> 6.0. 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, soil and ground water samples), and subsurface conditions may <br /> vary away from these data points No other warranty, expressed or implied, is made as to the <br /> professional recommendations contained in this report <br /> Advanced CeoEnvironmental,Inc <br />