TABLE 3. (Continued) Casing Open hole To'l depth below land Depth below Range surface Diameter land surface D'nm-"tr in depth Well number Date drilled (feet) (inches) (feet) (.nch-a) (feet) Aquifer Remarks Sumter County 821-158-1 July 1050 53 3 53 21/. 0 F Chert at 58 feet impenetrable. Well destroyed. 821-158-2 July 1959 40 3 49 21/ 0 F Chert at 49 feet impenetrable. Uot- tom of casing blasted open for use as observation well. 821-202-8 February 1959 20 6 20 5/ 20- 29 F July 1959 148 2% 20-143 F Deepened for geologic control. 821-202-4 February 1959 12 6 5 5% 5- 12 F Gravel packed (limestone pebbles). 827-158-1 July 1059 175 3 09 2% 99-175 F