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Service. All herbicides and pesticides utilized will be those that <br />are approved by the appropriate state and federal governmental <br />agencies responsible for the approval and distribution of such <br />agents. <br />Measures for Determining Success of Reveaetation <br />The success of revegetation will be determined as explained in <br />subsection 4.15. <br />Soil Testing Plan <br />In order to assure that the reapplied topsoil will support the <br />proposed post-mining land use of rangeland, a soil sampling program <br />will be implemented. After spreading the topsoil on the regraded <br />overburden surface, a sampling program will be initiated. Soil <br />samples will be taken randomly over each retopsoiled area and will <br />be representative of the topsoil being stripped from the removal <br />areas. <br />Specific parameters to be sampled are nitrate-nitrogen reported as <br />• parts per million (ppm); phosphorus as ppm; and potassium as ppm. <br />Rates of fertilizer application will be determined on a site by <br />site basis, but in general if phosphorus is limiting, phosphorus <br />will be applied at loo pounds per acre of P, and if nitrogen is <br />limiting it will be applied at 50 pounds per acre of N. <br />Acid-Forming and Toxic-Forming Materials <br />No significant acid-forming materials exist within the overburden <br />soil or coal seams to be mined. Therefore, Colowyo will not <br />undertake special handling procedures as described in Section <br />2.05.3. A detailed description of the chemical characteristics of <br />soils and overburden materials is presented under Sections 2.04.6 <br />and 2.04.9. <br />For a detailed description of the special handling of spoil <br />material and sampling programs, refer to the Production Methods and <br />Equipment Segment of this section. <br /> <br />2.05-57 <br />