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Table HI <br />Estimated Drill Hole Depths <br /> <br />Drill Rotary Core <br />Hole Footage Footage T.D. <br />' <br />A 1790 80 1870 <br />B 1670 80 1750 <br />C 1230 80 1310 <br />D 1310 80 1390 <br />E 185 80 265 <br />F 1015 80 1095 <br />' <br />G 1430 80 1510 <br />H 925 80 1005 <br />I 1545 80 1625 <br />' <br />J 160 80 240 <br />K 945 80 1025 <br />L 1180 80 1260 <br />' M 1070 80 1150 <br />T 2360 80 2440 <br />U 1285 80 1365 <br />V 1935 80 2015 <br />' <br />Total 20,035 1,280 21,315 <br />Modification of Drill Holes to Surveillance for Water Levels <br />' Ark Landis not proposing to convert any of the holes to water monitoring wells. <br />Drill Hole Abandonment Methods <br />The drill hole plugging method described in 43 CFR II 3484.1 (a) will be used for all <br />holes. Each hole will be plugged with cement slurry through mineably duck coal beds and <br />' aquifers fora distance of at least 50 feet above and below (see Attachment 3). The rest of the <br />hole will be filled with an approved bentonitic completion mud or gel, cuttings, or cement to <br />within 10 feet of the surface. A 10-foot surface plug will be set, and a brass tag or monument <br />' marking the drill hole LD. will be cemented atop the surface plug. Surface casing will be cut off <br />at or just below the level of the drill pad, allowing for future location and identification of the <br />drill hole. <br />Reclamation Plan <br />Reclamation activities will follow the completion of each hole as closely as possible. <br />12 <br />