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30 July 2008 AGE-NC Project No . 99-0682 Page 12 of 13 • The lateral extent of hydrocarbon-impacted soil at a depth of 60 feet bsg is defined to the west by boring MW9; the lateral extent of hydrocarbon-impacted soil at a depth of 60 feet bsg is undefined in all other directions as illustrated on Figures 4, 6, 8 and 11 . • The lateral extent of hydrocarbon-impacted soil at a depth of 70 feet bsg is defined to the west by boring MW9; the lateral extent of hydrocarbon-impacted soil at a depth of 70 feet bsg is undefined in all other directions as illustrated on Figures 4, 6, 8 and 12. • Adsorbed hydrocarbons detected at depths of 50 feet to 70 feet bsg is likely due to smear zone-impact, or the release of hydrocarbons during a drought period which migrated north from the former UST area. • The vertical extent of hydrocarbon-impacted soil is undefined in the former UST area and north, south, and east of the former UST area as illustrated on Figures 4, 6 and 8 . 5.0. RECOMMENDATIONS Based on the findings of the environmental activities recounted in this report, AGE recommends : • Continued quarterly ground water monitoring at the site; • Additional off-site subsurface investigation to determine the extent of hydrocarbon-impacted ground water and soil to the north and northeast; a historic records (photos, building records and fire insurance maps/fire department permits) research for UST(s) north of the site and; • Preparation of an Interim Remedial Action Work Plan as directed by the EHD in a letter dated 10 June 2008 . bon) 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 upon analytical results provided by an independent laboratory. Evaluation of the geologic and hydrogeologic conditions at the site for the purpose of this investigation was made from a limited number of available datapoints (i.e. , soil and groundwater samples) and subsurface conditions may vary away from these data points . No other warranty, expressed or implied, is made as to the professional interpretations, opinions, and recommendations contained in this report. Advanced GeoEnviranmental, Inc.