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22TG3E32XC Project Plan <br />Afinor Revision 325 <br />Page 9 of IO <br />MEASURES TO BE USED TO COMPLY WffH PERFORMANCE STANDARDS <br />FOR THE PROJECT (43 CFR 3484.1(a). 30 CFR 815.15. and Colorado Division of <br />Minerals and Geolo_w Rules and Reeulationsl <br />L 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 anticipated that gas will be encountered in the rubblized-zone of the B Seam. Gas is <br />known to be encountered after mining in previous methane drainage holes in the azea. <br />Casing will be set in each hole as necessary to maintain circulation of cuttings to the <br />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 these MDWs per DMG Rules 2.05.4 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-off 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. Mountain Coal Company may conduct <br />geophysical logging and/or collect core from this project. <br />5. Utilizing drill holes as water monitoring wells. <br />