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' Page 5 <br />' Topsoil: <br />According to the Soil Conservation Service (SCS), the Chipeta, Killpack, <br />' and Persayo soils are poorly suited for use as topsoil, due to salinity, <br />shallow depth, and low available water capacity. The Billings soil is <br />' rated as fair for use as topsoil due to clay content and salinity. <br />A soil sample was taken from the proposed site and geochemical analyses <br />' were conducted. The soil resembled Billings soil series. The Sodium <br />Absorption Ratio (SAR) was 2.53 and the Electrical Conductivity (EC) was <br />' 1.85. The depth of soil appears to be deeper than 15 inches, but less <br />than three feet. <br />' The soil within the disposal area appears to be better suited than the <br />' ~ SCS indicates. Soil will be removed to a depth of 15 inches and directly <br />placed on graded fill material (not coal waste material), except for that <br />' portion that will be used to cover the final fill. Approximately 12 inches <br />of topsoil will cover the fill material. The remaining three inches will <br />be used to cover thin areas on the existing filled area. Approximately <br />' 163,350 cubic yards of undisturbed soil exists on the remaining disposal <br />area. This is sufficient to cover the nine acres with 12 inches of topsoil <br />' plus 544.5 cubic yards for thin areas (.34 acres). If a surplus of topsoil <br />exists at the conclusion of the operation, it will be spread to increase <br />' the depth of topsoil. <br />' VEGETATION RESOURCE INFORMATION <br />Western Slope Carbon's coal waste disposal site is located within the Clayey <br />Saltdesert range site (Soil Mapping Unit 23, Soils and Vegetation Map) and <br />' the Salt Flats range site (Soil Mapping Unit 16, Soils and Vegetation Map). <br />The soils for these range sites are characterized by moderately alkaline <br />' and clayey soils. The vegetation for both range sites consist of salt <br />tolerant species, requiring medium to heavy (clay) textured soils. <br />' The topography is undulating terrain located between the valley floor and <br />' the precipitous hills, dissected by gullies. The elevation is approximately <br />5480 feet. <br />