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f 1 <br />' 30 May 2001 <br /> AGE-NC Project No 95-0128 <br />' Page 6 of 6 <br />' toward the southeast) at 0 1 feet, well MW-6 (located 50 feet toward the north-northwest) <br /> at 0 12 feet and in well vapor well VW-1 (located 60 feet toward the west) at 0 06 feet <br /> (Appendices C, D, E) <br />' 0 Utilizing a semi-loganthmic plot of ground water draw-down vs observation well distance <br /> to pumping well, a best-tit line can be utilized to project a radius of influcnee of <br />' approximately 65 feet at 5 GPM (Appendix H) <br /> • Utilizing the Distance-Drawdown Method, a transmissivity was calculated at 205 W/day <br />' (equivalent to 1,536 gallons per day/ft) and a storativity value was calculated at 0 054 <br /> (Appendix H) <br /> • Based on a transmissivity value of 205 ft'/day and the extraction well screen thickness equal <br />' to 25 ft (screen Interval at EW-1), a hydraulic conductivity value was calculated at 6144 <br /> ft/day, or 0 022 cm/s (Appendix H), a hydraulic conductivity of 0 022 cm/s Is consistent with <br /> a screened Interval located within a well sorted sand to clean sand (Appendix K) <br />' a Laboratory analysis of extracted water dunng the pumping test detected elevated <br /> concentrations of TPH-g, BTEX and MTBE (Appendix 1) <br /> 1• <br /> I5.0 RECOMMENDATIONS <br /> lnitiatton of ground water extraLtion activities detailed in the approved in the work plan titled Interim <br /> IGround Water Remediation <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 Evaluation 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 (Solinst Levelogger data, ground water samples), and subsurface conditions <br /> may 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 /> I <br /> Advanced GeoEnviroapnental Inc <br /> I <br />