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1 <br /> TABLE V-1 <br /> HYDROGEOLOGIC INFORMATION <br /> ' Ground Depth to Elevation Depth to Water Elev. Water Zones <br /> Pit Elevation Shale Top of Shale Water 7/16196 7/12196 <br /> Number (feet)* (feet) (feet)* (feet) (feet)* (feet) <br /> ' 1 5354 14 5340 4 5350 8 feet <br /> 2 5360 8 5352 7 5353 Dry when dug <br /> ' 3 5364 7 5357 7 5357 Dry when dug <br /> 4 5356 6 5350 3 5353 Dry when dug <br /> 5 5352 8 5344 dry dry Dry when dug <br /> ' 6 5365 6 5359 3 5362 Dry when dug <br /> 7 5370 7 5363 3 5367 4-1/2 feet <br /> 8 5376 9 5367 7 5369 9feet <br /> 9 5366 6 5360 2 5364 3-1/2 feet <br /> ' 10 5363 6 5357 2 5361 Dry when dug <br /> 11 5360 6 5354 dry dry Dry when dug <br /> *measurements in feet above mean sea level <br /> The two pits that have remained dry are an enigma. Based on elevations of the groundwater in <br /> the other pits, they should have also shown an indication of groundwater. It is possible that <br /> shale from the construction of the nearby ponds was deposited at these sites and mixed with <br /> the regraded gravel and boulders. This could create an impermeable area in the vicinity of <br /> ' these pits causing them to be dry. <br /> iA water zone was observed in pits No. 1, 7, 8, & 9 as they were being dug. The resultant <br /> static water in these pits was measured on July 16, 1996 and was higher than the observed <br /> water zone on the day the pits were dug. It appears that the groundwater is moving through <br /> selected sandy gravel zones or along the top of the Pierre Shale, and is under a slight artesian <br /> head. The isolated sandy gravel zones that the groundwater is moving through were probably <br /> tcaused by the reclamation grading and filling of the gravel pits. <br /> ' A groundwater contour map was constructed using the water elevations from the eleven (11) <br /> pits, ponds, visible seeps, and seven monitoring wells, see Exhibit V-2. The contour map <br /> ' -16- <br />