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r <br />cur f ace <br />3 Ft. Fill <br />_ 5 FA_ t <br />- Concrete Plug <br />r 50 Ft. Concrete <br />or Bentonite• 'lug Gel <br /> <br />r; Octuifer <br />r <br />_._.._.._...._. ; ° 50 Tt•......Concrete <br />or Bentonite Plug Gel <br />,? 50 Ft. Concrete <br /> or Bentonite Plug Gel <br /> Coal Zone. <br /> <br />;,. 50 Ft, Concrete <br /> <br />7 <br />or Bentonite Plug Gel <br />1. Hole must be back-filled w th as <br />many cuttings as possible, All <br />remaining cuttings must be <br />dispersed evenly over the <br />surrounding surface. <br />2. Hole must be blocked to a depth <br />of five (5) ft. below collar <br />with a•short hole plug. If water <br />is encountered in the drill '!Zola, <br />a concrete plug'must be set <br />below ground three'(3) ft. The <br />upper three (3) ft. of the hole <br />.is then filled with cuttings and <br />soil. <br />3. All water bearing zones will be <br />concreted or sealed with a <br />bentonite gel plug if a well is <br />not developed.. If coal seams are <br />encountered, they must be sealed <br />in the. same manner. <br />4. All sump holes used during <br />drilling must be drained and <br />backfilled. <br />5. The site around the hole must be <br />cleaned up and surplus cuttings <br />leveled. Seeding disturbed areas <br />may be required. <br />Tt°m` <br />ABANDONMENT OF' S ' LLOW DP T T L HOLES <br />NORTHERN ROCFY I10UNTp ? N REGION