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Topsoil deposition is monitored by a trained person whom insures that topsoil is <br />placed at the desired location and depth. Monitoring is intended to control <br />replaced depths by +4 inches on areas of one half acre or larger. If areas of <br />one half acre or greater are found deficient of topsoil during monitoring, top- <br />soil is added to obtain the desired depth. <br />Not all topsoil is considered suitable for replacement onto areas designated for <br />cropland use. (Refer to Section 4.9.4 for soils considered suitable for crop- <br />lands.) Soils deemed unsuitable are placed in stockpiles or transported directly <br />to areas to be reclaimed to rangeland. An exception may be applied if the top- <br />soil has been classed as unsuitable for croplands only because it was too shal- <br />low. In such an instance, the soil could be used for cropland if applied to an <br />adequate depth. Another exception may be applied if the soil was designated <br />unsuitable because it is too sandy but occurs on relatively small areas amongst <br />soils considered suitable. In this instance, adequate mixing will occur to miti- <br />gate the effect of using the sandy soil. <br />. After topsoil is replaced, the area is once more dragged or otherwise smoothed <br />to promote safe operation of farm equipment on the surface and to achieve a uni- <br />form distribution. If needed, rocks are removed again as well. <br />3.6.2.3 Fertilization <br />Olsen (1974) while conducting overburden sampling from within the proposed permit <br />area also analyzed the topsoil for parameters that could limit normal plant <br />growth (see Section 2.7.2.2; Table 2.7-6). It was found that the macroelements <br />phosphorus (P) and nitrogen (N) were below levels considered adequate for pro- <br />longed plant growth. As previously mentioned in Section 3.6, agronomic standards <br />0 3-71 <br />REVISED FEB 13 '87