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29 June 2001 <br /> AGE-NC Project No 97-0333 <br /> ' Page 5 of 5 <br /> 5.0. RECOMMENDATIONS <br /> Based upon the results of the second quarter 2001 investigation, AGE recommends <br /> ' • Continued quarterly groundwater monitoring utilizing wells MW-1, MW-2, MW-3, MW-4, <br /> MW-5 and MW-6 for characterization of ground water conditions on the site The next <br /> ' ground water monitonng event will tentatively be scheduled for July 2001 <br /> • Future ground water sampling should include full EPA Method 8260 analysis <br /> • Upon UST Cleanup Fund preapproval, install and continuously operate a ground water <br /> extraction system (interim remediation) in the area of MW-6 to inhibit further off-site <br /> migration of the fuel-impacted ground water plume An interim remediation work plan was <br /> approved by the PHS-EHD on 26 June 2001 <br /> • Based on the findings from CPT soil borings P-7, P-8, P-9 and P-10 (Cone Penetrometer <br /> Testing Site Investigation - Fourth Quarter 2000, dated 07 February 2001), a work plan <br /> ' should be submitted to the PHS-EHD for installation of additional shallow and deep- <br /> screened ground water monitoring wells, the screen intervals for the deep-screened <br /> ' monitoring wells will be placed to define and monitor the vertical extent of the ground water <br /> }iluiiie lii LdLh infunndl hydlulugtL Lunt <br /> ' Review of historic records which should include records on file with the local fire <br /> department, building department or planning division and cross-referenced telephone <br /> directories to identify potential petroleum- and chIon nated-hydrocarbon sources on or near <br /> the property, <br /> ' Review of EDR Sanborn Fire insurance Maps (if available) and aerial photographs to assess <br /> the possibility of usage, storage and disposal of petroleum- and chlonnated-hydrocarbons at <br /> ' the site or on surrounding properties <br /> ' 60 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 (ground water samples), 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 /> 4dvanred Geof nwonmeutai loc <br /> 4 <br /> i <br />