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E Seam Drill Hole for Concrete Delivery Project Ply <br />Minor Revision 333 <br />Page 8 of 9 <br />MEASURES TO BE USED TO COR9PI,Y WITH PERFORMANCE STANDARDS <br />FOR THE PROJECT (43 CFR 348~1.1(al, 30 CFR 815.15, and Colorado Division of <br />Minerals and Geology Rules and Re ations) <br />1. Operator shall comply with applicable requirements of surface management <br />agency, 30 CFR 815.15, or approved State program, <br />Mountain Coal Company has reviewed, and will comply with, all applicable requirements <br />of 30 CFR 815.15 and the Colorado Mined land Reclamation Regulations stated in <br />C.RS. 34-33-101: <br />2. Install casing and blowout preventers in drill holes in known oil, gas, and geothermal <br />areas. <br />It is not anticipated that gas will be encountered. Gas is known to be encountered after <br />mining in previous methane drainage holes in the area. Casing will be set in the hole as <br />necessary to maintain circulation of cuttings to the surface. <br />3. Drill hole plugging requirements. <br />In accordance with the Coal Program Guidance Document -Methane Drainage and <br />Monitoring Wells, MCC will plug and abandon this drill hole per DMG Rules 2.05.E and <br />4.07,3 at the minimum. A mechanical packer will be set at the lowest possible point in <br />the well (note that subsidence damage to the casing may preclude access to the entire <br />depth of the casing). Above this packer the hole will be plugged with CDMG approved <br />materials to the bottom of the 5-foot cement surface cap using tremmie line. The top 5- <br />feet of the well below the sub-surface casing cut-0ff point (3-feet below the surface) will <br />be plugged with a cement cap, The top 3-feet of the casing will then be cut off and the <br />hole filled in with subsoil. A permanent marker shall be installed on top of the plug <br />identifying the well. The pad will then be reclaimed to approximate original contour. <br />The Methane Drainage Well drilling experience for Mountain Coal Company has shown <br />that no aquifers have yet been encountered. However, the procedures described above <br />would serve to properly protect any aquifers that would be encountered. <br />4. Retention of drill logs by applicant <br />Mountain Coal Company will retain in its files all drill logs and will make them available <br />for inspection by any authorized officer. <br />5. Utilizing drill holes as water monitoring wells. <br />Mountain Coal Company does not anticipate encountering any significant aquifers during <br />this drilling. Mountain Coal Company does not intend to complete this hole as a water <br />monitoring well <br />