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RULE 2 PERMITS <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 <br />program will be implemented. Soil samples were taken randomly over each retopsoiled area and <br />were analyzed for nitrate- nitrogen, phosphorus, and potassium. Historical results indicated adequate <br />nutrient value to support post- mining revegetation. <br />Colowyo has demonstrated through numerous years of monitoring that topsoil fertility is not a <br />concern at the mine; this is mainly due to the nutrient rich soil that is commonly present throughout <br />the region. As a result, Colowyo has suspended the soil testing program requirements, until such <br />time as Colowyo determines that the soil fertility adversely affects the reclamation and/or the post - <br />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 <br />under 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 <br />the 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 <br />has been developed to protect against spills. <br />All major equipment on the mine site will be equipped with portable fire extinguishers or automatic <br />fire suppression systems. The water truck used for dust suppression at the mine site could also be <br />used to control most fires. <br />Sealing 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 <br />groundwater monitoring well will be completed with casing or piezometers at sufficient height above <br />the land surface to prevent drainage of surface water or entrance of foreign material into the well, and <br />will be fitted with caps to prevent the introduction of objects other than monitoring and sampling <br />equipment. When the groundwater monitoring wells are no longer needed or required for any <br />purpose, each well will be eliminated by plugging with concrete to the surface and removal of the <br />associated surface structure. <br />Plugging procedures utilized for exploration drill holes that will not be mined through during the <br />current 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 <br />to within 3 feet of the ground surface. <br />Rule 2 Permits 2.05 -36 Revision Date: 10/23/12 <br />Revision No.: RN -06 <br />