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Service. All herbicides and pesticides utilized will be those that aze approved by the <br />appropriate state and federal governmental agencies responsible for the approval and <br />distribution of such agents. <br />Measure for Determinine Success of Reve etation <br />The success of revegetation will be determined as 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 <br />assure that the reapplied topsoil will support the proposed post-mining land use of <br />rangeland, a soil sampling program was implemented. Soil samples were taken randomly <br />over each retopsoiled area and were .analyzed for nitrate-nitrogen, phosphorus, and <br />potassium. Historical results indicated adequate nutrient value to support post-mining <br />revegetation. <br />Colowyo has demonstrated through numerous years of monitoring that topsoil fertility is <br />not a concern at the mine; this is mainly due to the nutrient rich soil that is commonly <br />present throughout the region. As a result, Colowyo has suspended the soil testing <br />program requirements, until such time as Colowyo determines that the soil fertility <br />adversely affects the reclamation and/or the post-mining land use. <br />As needed other soil amendments will be added to the reclaimed azeas to support <br />reclamation efforts. <br />Acid-Forming and Toxic-Formine Materials <br />No significant acid-forming materials exist within the overburden soil or coal seams to be <br />mined. Therefore, Colowyo will not undertake special handling procedures as described <br />in Section 2.05.3. A detailed description of the chemical chazacteristics of soils and <br />overburden materials is presented under Sections 2.0406 and 2.04.9. <br />For a detailed description of the special handling of spoil material and sampling <br />programs, refer to the Production Methods and Equipment Segment of this section. <br />Rule 2.05 2.05-57 Revision Date 10/22/04 <br />Revision No. TR-59 <br />