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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 <br />plans. Ark Land Company has reviewed, and will comply with, all applicable <br />requirements of 30 CFR 815.15 and the Colorado Mined Land Reclamation <br />Regulations stated in 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 <br />quantities of gas under pressure are not known to have been encountered in any of <br />the previous drilling efforts in the area. Methane from coal mining has been <br />liberated at the West Elk Mine. Since the proposed drilling will not penetrate the <br />entire Rollins Sandstone and not drill into the underlying Mancos Shale, blowout <br />preventers may not be used. Casing will be set in each hole as necessary to <br />maintain circulation of cuttings to the surface. <br />3484.1(a)(3) <br />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 <br />above any mineably thick coal bed or potentially usable aquifer. <br />The remainder of the hole will he 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 <br />cement surface plug will be set, capped with an appropriately marked brass or <br />aluminum 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 <br />year, 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 <br />one 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, ALC 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, ALC proposes to <br />delay construction of the water monitoring well until the hole is drilled and a <br />determination on mineability of the resource is completed. <br />3482.1(a)(3)(viii) - Map of Exploration Area: <br />A map of the proposed exploration area at a scale of 1:24,000 (1" = 2,000') is <br />included showing all drill hole locations, existing roads and access roads to be <br />constructed is included in the pocket folder of this application. <br />13 <br />