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total maximum potential coal removed is substantially less than the 250 tons defined in the <br />regulations. <br />3482.1(a)(3)(vi) - Measures to be Used to Comply with Performance Standards for <br />Exploration (43 CFRII 3484.1(a), 30 CFR 815.15, and Colorado State <br />Permanent Program Rules): <br />All applicable parts of the Federal and State Performance Standards for Coal Exploration have <br />been covered in the preceding exploration and reclamation plans. Ark Land LLC has <br />reviewed, and will comply with, all applicable requirements of 30 CFR 815.15 and the Colorado <br />Mined Land Reclamation Regulations stated in C.R.S. 34-33-101. <br />3484.1(a)(1) Operator shall comply with applicable requirements of surface management <br />agency, 30 CFR 815.15, or approved State program <br />All applicable parts of the Federal and State Performance Standards for Coal <br />Exploration have been covered in the preceding exploration and reclamation plans. <br />Ark Land LLC has reviewed, and will comply with, all applicable requirements of <br />30 CFR 815.15 and the Colorado Mined Land Reclamation Regulations stated in <br />C.R.S. 34-33-101. <br />3484.1(a)(2) Installation of casing and blowout preventers in drill holes in known oil, gas, <br />and geothermal areas <br />The Sunset Trail area is not in a producing natural gas field. Significant quantities <br />of gas under pressure are not known to have been encountered in any of the previous <br />drilling efforts in the area. Methane from coal mining has been liberated at the <br />West Elk Mine. Since the proposed drilling will not penetrate the entire Rollins <br />Sandstone and not drill into the underlying Mancos Shale, blowout preventers may <br />not be used. Casing will be set in each hole as necessary to maintain circulation of <br />cuttings to the surface. <br />3484.1(a)(3) Drill hole plugging requirements <br />Each drill hole will be plugged according to the requirements outlined in this <br />section: The hole will be plugged with cement from 50 feet below to 50 feet above <br />any mineably thick coal bed or potentially usable aquifer. <br />The remainder of the hole will be filled with a completion mud (bentonite gel) <br />and/or drill cuttings or cement to within 10 feet of the surface. A 10 ft. thick cement <br />surface plug will be set, capped with an appropriately marked brass or aluminum <br />monument, at or below ground level. <br />3484.1(a)(4) Retention of drill and geophysical logs by applicant <br />The company will retain in its files, all drill and geophysical logs for at least 1 year, <br />and will make them available for inspection by any authorized officer. An <br />authorized officer will keep all un -analyzed drill cores in possession for at least one <br />year if requested, and will be available for inspection. <br />3484.1(a)(5) Utilizing drill holes as water monitoring wells <br />As stated above, AL proposes to convert exploration hole SST -2 to a E Seam <br />water monitoring site if mineable thickness of E Seam coal is present. Due to the <br />high potential for unmineable coal to be present at that location, AL proposes to <br />13 <br />