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LM LEED$HILL HEfiKENHOFF NC RESULTS 4.1 SOIL SAMPLING ' As discussed in Section 3, Site Investigation, seven soil borings (TB5, TB6, TB7, TB8, TB9, MW4 and MWS) were installed, representative soil samples obtained, and analyses performed for both BTX&E and TPH as gasoline. Results from the soil ' samples are presented in Table 1. As illustrated in Table 1, only soil samples obtained from boring TB5 showed significant petroleum hydrocarbon contamination. All other samples collected from TB6, TB7, TB8 TB9, MW4, and MW5 showed trace or non-detectable levels of both BTX&E and TPH as gasoline. Hydrocarbon levels in TB5 increased with depth to a maximum concentration at a depth of 15 feet and then decreased rapidly to non-detectable levels at a depth of 30 feet. ' 4.2 GROUNDWATER SAMPLING As discussed in Section 3, five groundwater samples were obtained from MW1, MW2, ' MW3, MW4, and MW5. Analyses were performed for BTX&E and TPH as both gasoline and diesel . Results from the groundwater sampling are presented in Table 2 As illustrated in Table 2, samples obtained from all five monitoring wells show detectable levels of petroleum hydrocarbon constituents, with MW2 and MW5 showing significantly higher levels. No phase separated hydrocarbons were found in any monitoring well . 4.3 GROUNDWATER FLOtl The depths to tater in the five monitoring wells were measured on several occasions, most recently on December 27, 1989 to determine the general direction ' and gradient of groundwater flog. Groundwater level data from this investigation are tabulated below. Groundwater Levels Well No. RE!Z elevation ft Depth to Water (ftp Elevation 2/ (fu MW1 16.41 52 06 -35.65 MW2 16.10 52.09 -35 99 MW3 16.54 52.48 -35.94 MW4 16.72 52.52 -35 80 MW5 16.90 52.94 -36.04 Top of casing reference point elevation, as determined by licensed surveyor z/ Elevation of water surface, December 27, 1989 r�