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08 October 2003 <br /> AGE-NC Project No 97-0343 <br /> Page 3 of 4 <br /> 4 0. SUMMARY AND CONCLUSIONS <br /> Based on the data collected from the site, AGE finds <br /> IGround water flow at the site on 19 May 2003 was inferred to be generally toward the <br /> north-northwest at an average gradient of 0 008 feet/feet, which is consistent with the <br /> I historical ground water flow direction at the site Ground water elevations at the site <br /> decreased in wells MW4 through MW7 an average of 0 05 feet since the first quarter 2003 <br /> monitoring event <br /> ITPH-g,TPH-d,BTEX and fuel additives were not detected at or above laboratory reporting <br /> limits in the ground water samples collected from wells MW4 through MW7 <br /> • The historically fuel-impacted wells MW 1, MW2 and MW3 were not purged or sampled <br /> during the May 2003 monitoring event due to no measurable water in these wells Maps <br /> depicting the approximate distribution of dissolved TPH-g,TPH-d and benzene, interpreted <br /> from this event and previous monitoring events performed in 2002, are presented in Figures <br /> 4, 5and 6 <br /> • The lateraI extent of the hydrocarbons-impacted ground water has been defined <br /> 5 0. RECOMMENDATIONS <br /> I Based on the findings of the environmental activities recounted in this report, AGE recommends <br /> continued quarterly monitoring of the on-site ground water monitoring wells The next monitoring <br /> event should be performed in August 2003 <br /> The AGE-prepared Additional Monitoring Well Installation Work Plan, dated 20 September 2002, <br /> to install a depth-discrete monitoring well,was approved by the EHD by letter dated 26 November <br /> 2002 The work is anticipated to be completed during the third quarter 2003 <br /> I6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> Ienvironmental consultants practicing in this or similar localities The findings were based upon <br /> analytical results provided by an independent laboratory Evaluation of the hydrogeologic conditions <br /> at the site for the purpose of this investigation was made from a limited number of available data <br /> points(e g ,ground water samples)and subsurface conditions may vary away from these data points <br /> • <br /> IAdvanced GeoEnwronmental,Inc <br />