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k" KLEINFELDER <br /> 4 SITE GEOLOGY AND HYDROGEOLOGY <br /> 1 <br /> Four soil borings were drilled between March 15 through 17, 1989. The total depths of the <br /> borings range from 29.5 feet to 34.5 feet below ground surface. The subsurface lithology <br /> consists primarily of sandy silts and. silty clays. Some lenses of fine sand, medium coarse <br /> sand, and some sandy gravel are present in individual borings but do not appear to be <br /> prevailing as a continuous sedimentary unit. <br /> Saturated conditions were encountered in MW-1' at 18.5 feet in MW-2' at 14.0 feet in <br /> Boring B-8 at 14.5 feet, and in MW73 at 14.0 feet`below the ground surface. The aquifer <br /> exists under nonconfined conditions, and the local'direction of ground water flow is toward <br /> the hospital due to the pumping of groundwater from beneath the hospital. Due to depth <br /> of the hospital basement, pumping. is maintained to lower the immediate ground water <br /> table. <br /> 1 <br /> L <br /> 175-89-543 8 <br /> a <br />