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RULE 2 PERMITS <br />Specific control measures will be selected by evaluating the location, growth characteristics and <br />vulnerability of each weed. Management efforts will begin after proper planning and evaluation are <br />performed. Proper use of chemicals applied during weed control is ensured by oversight of weed <br />spraying activities by individual(s) certified by the State of Colorado to handle and apply herbicides. <br />Colowyo reserves the right to change and modify the practices and materials it utilizes within the weed <br />management program to achieve compliance with all applicable state and federal rules and regulations. <br />Colowyo will evaluate each infestation on an individual basis in order to ensure proper methods, timing, <br />materials and manpower are utilized for maximum effectiveness. <br />Measures for Determining Success of Revegetation <br />The success of revegetation is explained in subsection 4.15. <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. To <br />date there are no indications that Collom area topsoil resources will require amendments due to the pre - <br />mine vegetation communities identified for both the existing operation and areas identified for <br />disturbance in the Collom area being so similar. <br />2.05.4 (2)(f -h) Disposal, Mine Openings, Water and Air Control <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 <br />protect against spills will be available to the Division to review prior to final approval of PR -03. <br />Collom — Rule 2, Page 115 Revision Date: 1/23/09 <br />Revision No.: PR -03 <br />