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IRE <br /> r_ <br /> feet below the encountered water table. Relatively undisturbed soil <br /> samples were obtained at various depths with a split spoon <br /> sampler during the drilling of both wells. The soils encountered <br /> in the borings consisted of predominately silty and sandy clays <br /> { <br /> with occassional stringers of gravelly sands. The soil samples <br /> and drill cuttings were screened in the field for volatile <br /> hydrocarbon concentrations usingHNU hotoionizer <br /> an p detector <br /> (PSD). No hydrocarbons were detected in either boring. <br /> ff The monitoring wells were installed using 2 inch diameter, <br /> �r 1 <br /> 0.020 inch slatted, PVC screen and blank PVC casing., The <br /> screened interval of the well extended from the bottom of the <br /> bore hole (70 feet) to 30 feet below the ground surface. The r <br /> blank casing extended from this point to the surface. A gravel <br /> ! pack was placed in the annular s ac : to <br /> p provide a filter between <br /> the screen and the subsurface silts, sands and clays. A one foot . <br /> thick bentonite seal and concrete to the surface completed the <br /> ,V wells. Drilling ,fogs .and details of monitoring well construction <br /> are presented in Appendix I. <br /> LINE LEAK. INVESTIGA'T'ION <br /> Four soil borings, SB-1 through SB-4, were drilled on <br /> January 9 and 10, 1986 along the path of the fuel lines leading <br /> from the underground storage tanks to the pump islands (See <br /> Figure 2). The borings were drilled to a depth of 10 feet below . <br /> ... grade— Two soil -samples consisting primarily of -silty clay's, <br /> were obtained from each hole with a .split spoon sampler. These <br /> samples ,were..scr.eened for hydrocarbons with the HNU photoionizer <br /> ! calibrated for benzene. No hydrocarbons were detected in any of <br /> the samples. <br /> l � _ <br /> L <br /> �i <br />