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i <br /> i <br /> . 14 March 2003 <br /> i AGE-NC Protect No 97-0343 <br /> Page 4 of 4 <br /> i4.0. SUMMARY AND CONCLUSIONS <br /> Based on the data collected from the site, AGE finds <br /> i • Ground water flow at the site on 05 February2003 was inferred to be generally toward the <br /> g Y <br /> i northwest at an average gradient of 0 001 feet/feet, which is consistent with the historical <br /> ground water flow direction at the site Ground water elevations at the site increased in wells <br /> MW4 through MW7 an average of at least 2 9 feet since the fourth quarter 2002 monitoring <br /> i event <br /> i TPH-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 /> i • The histoncally fuel-impacted wells MW1, MW2 and MW3 were not purged or sampled <br /> during the February 2003 monitoring event due to no measurable water in these wells Maps <br /> i 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, 5 and 6 <br />�. o The lateral extent of the hydrocarbons-impacted ground watei has been defined <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of the environmental activities recounted in this report, AGE recommends <br /> continued quarterly monitoring of the on-site groundwater monitoring wells The next monitoring <br /> event should be performed in May 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 second quarter 2003 <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised <br /> by environmental 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 /> . No other warranty,expressed or implied,is made as to the professional interpretations,opinions and <br /> recommendations contained in this report <br /> Advanced GeoEnvironmental,Inc <br />