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RULE 2 PERMITS <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 could be considered for addition to the reclaimed areas to <br /> 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. <br /> A 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 <br /> to 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 <br /> plan 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 <br /> above the land surface to prevent drainage of surface water or entrance of foreign material into the <br /> well, and will be fitted with caps to prevent the introduction of objects other than monitoring and <br /> sampling equipment. When the groundwater monitoring wells are no longer needed or required <br /> for any purpose,each well will be eliminated by plugging with concrete to the surface and removal <br /> of the 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 <br /> pumping cement or heavy solids bentonite Plug Gel or chips through the drill stem from <br /> the bottom up to within 3 feet of the ground surface. <br /> 2. Drill holes shallower than stripping limits (450-500 feet) may be plugged with the ready- <br /> mix concrete method instead the method in#1 to within 3 feet of the ground surface. <br /> Rule 2 Permits 2.05-24 Revision Date: 10/27/20 <br /> Revision No.: TR-143 <br />