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1 <br /> Approximate <br /> Depths (ft) Flush-mount water <br /> Ground level tight well cover <br /> Locking well cap <br /> % % % % % Cement grout <br /> 2-inch PVC casing <br /> % % % % <br /> 2ft— Bentonite seal <br /> 4 ft— Top of sand pack <br /> Top of screen set above <br /> highest expected water level <br /> 5 ft <br /> Highest expected water level <br /> 2-inch PVC slotted screen <br /> KE Sand pack <br /> 20 ft PVC threaded cap <br /> 8-inch <br /> borehole <br /> diameter <br /> 1 <br /> Figure 6. Typical monitoring well construction details. <br /> 940694/S14 <br /> 4-6 <br />