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i <br /> I09 January 2004 <br /> AGE-NC Project No 96-0254 <br /> Page 6 of 6 <br /> area,did not contain detectible concentrations of target analytes,thereby defining the vertical <br /> extent of hydrocarbon-impacted soil <br /> • Based on the analytical results of soil samples collected during the over-excavation, AGE <br /> I calculates that approximately 1913 lbs or 306 gal of gasoline were removed during over- <br /> excavation in May 2003 <br /> • AGE calculates that approximately 397 lbs or 25 6 gal of gasoline remain in soil at the site <br /> Approximately 83% of petroleum hydrocarbon-impacted soil was removed during the May <br /> 2003 excavation <br /> 5.0. RECOMMENDATIONS <br /> Based on the results of site investigation activities to date, AGE recommends continued ground <br /> I water monitoring and sampling as discussed in the Remedial Action Work Plan Natural attenuation <br /> parameters should be monitored during routine quarterly ground water monitoring and sampling <br /> events as directed by the EHD in the March 2003 letter <br /> 6.0. 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 upon <br />' analytical results provided by an independent laboratory Soil compaction testing was provided by <br /> an independent geotechnical company Evaluation of the geologic conditions at the site for the <br /> purpose of this investigation was made from a limited number of available data points(soil samples) <br />' and subsurface conditions may vary away from these data points No other warranty, expressed or <br /> implied,is made as to the professional opinions, interpretations and recommendations contained in <br />' this report <br /> 1 <br /> 1 <br /> • <br /> Advanced CeoEnvironmental,Inc <br />