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' 30 April 2000 AGE-NC Project No 97-0333 ' Page 5 of 5 ' 5.0. RECOMMENDATIONS Based upon the results of the First Quarter 2001 investigation, AGE recommends i • Continued quarterly ground water monitoring utilizing wells MW-1, MW-2, MW-3 MW-4 and MW-5 for characterization of ground water conditions on the site • Future ground water sampling should include full EPA Method 8260 analysis • Install and continuously operate a ground water extraction system (interim remediation) in ' the area of MW-2 to inhibit further off-site migration of the fuel-impacted ground water plume ' Based on the findings of CPT soil borings P-7, P-8, P-9 and P-10 (Cone Penetrometer Testing Site Investigation - Fourth Quarter 2000, dated 07 February 2001), a work plan should be submitted to the PHS-EHD for installation of additional shallow and deep- screened ground water monitoring wells, the screen intervals for the deep-screened monitoring wells will be placed to define and monitor the vertical extent of the ground water plume in each informal hydrologic unit • Initiation of remediation feasibility studies for corrective action • Review of historic records which should include records on file with the local fire ' department, building department or planning division and cross-referenced telephone directories to identify potential petroleum-hydrocarbon sources on or near the property, ' Review of EDR Sanborn Fire Insurance Maps (if available) and aerial photographs to assess " the possibility of usage, storage and disposal of petroleum hydrocarbons at the site or on N surrounding properties 1 6.0. LIMITATIONS Our professional services were performed using that degree of care and skill ordinarily exercised by ' environmental consultants practicing in this or similar localities The findings were based mainly ! upon analytical results provided by an independent laboratory Evaluations of the geologic/hydro- geologic conditions at the site for the purpose of this investigation are made from a limited number ' of available data points (ground water samples), and subsurface conditions may vary away from these data points No other warranty, expressed or implied, is made as to the professional recommendations contained in this report Advanced GeoEnvironmental,€nc d {