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RULE 2 PERMITS <br />Soil Testing Plan <br />From conception to the mid-1990's, Colowyo tested for topsoil fertility. In order to assure that the <br />reapplied topsoil will support the proposed post-mining land use of rangeland, a soil sampling program <br />will be implemented. Soil samples were taken randomly over each retopsoiled area and were analyzed for <br />nitrate-nitrogen, phosphorus, and potassium. Historical results indicated adequate nutrient value to <br />support post-mining revegetation. <br />Colowyo has demonstrated through numerous years of monitoring that topsoil fertility is not a concern at <br />the mine; this is mainly due to the nutrient rich soil that is commonly present throughout the region. As a <br />result, Colowyo has suspended the soil testing program requirements, until such time as Colowyo <br />determines that the soil fertility adversely affects the reclamation and/or the post-mining land use. <br />As needed other soil amendments will be added to the reclaimed areas to support reclamation efforts. <br />Acid-Forming and Toxic-Forming Materials <br />No significant acid-forming materials exist within the overburden soil or coal seams to be mined. <br />Therefore, Colowyo will not undertake special handling procedures as described in Section 2:05.3. A <br />detailed description of the chemical characteristics of soils and overburden materials is presented under <br />Sections 2.04.6 and 2.04.9. <br />For a detailed description of the special handling of spoil material and sampling programs, refer to the <br />Production Methods and Equipment Segment of this section. <br />Flammable liquids, such as oil and fuel, will be protected from spilling into other areas by earthen, <br />concrete or HDPE lined structures surrounding each storage facility. A spill containment control plan has <br />been developed to protect against spills. <br />All major equipment on the mine site will be equipped with portable fire extinguishers or automatic fire <br />suppression systems. The water truck used for dust suppression at the mine site could also be used to <br />control most fires. <br />Sealine of Exploration and Mine Holes <br />Exploration and mine holes which remain open for use as a water supply well or for use as a groundwater <br />monitoring well will be completed with casing or piezometers at sufficient height above the land surface <br />to prevent drainage of surface water or entrance of foreign material into the well, and will be fitted with <br />caps to prevent the introduction of objects other than monitoring and sampling equipment. When the <br />groundwater monitoring wells are no longer needed or required for any purpose, each well will be <br />eliminated by plugging with concrete to the surface and removal of the associated surface structure. <br />Plugging procedures utilized for exploration drill holes that will not be mined through during the current <br />Permit term are as follows: <br />1. Drill holes drilled deeper than the stripping limit (450-500 feet) will be plugged by pumping <br />cement or heavy solids bentonite Plug Gel or chips through the drill stem from the bottom up to <br />within 3 feet of the ground surface. <br />2. Drill holes shallower than stripping limits (450-500 feet) may be plugged with the ready-mix <br />concrete method instead the method in #1 to within 3 feet of the ground surface. <br />Rule 2 Permits 2.05-31 Revision Date: 6/23/08 <br />Revision No.: MR-91