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~~~ 0~~ rmiranmrnml trirniiLt and m¢mem • loam to clay loam topsoil material. The underlying material itt nearly all cases is weathered shale or weathered shale mixed with clayey soil material. The topsoil material on the railroad embankment was not sampled for lab analysis. The topsoil material on the railroad embankment ranges in thickness from 4 to 10 inches with an average of about 7 inches. Field notes from 16 examination sites located on the raih-oad embankment are presented in Appendix B. A steep cut slope without any topsoil occurs northwest of the loadout area. Three differ[:nt shales occur on the cut slope. On the slopes closer to the loadout aze interbedded black and brown gypsiferous shales. The black shale occurs on the upper slope (Stop #25) and the brown shale (Stop #24) occurs on the lower slope. A thin, 1- to 3-inch layer of weathered shale occurs on the surface. The black shale has slightly more clay and organic matter and greater salinity and sodicity levels in comparison to the brown shale (Appendix A). Gypsum concen[ratiotts in both samples are high. Neither shale would be toxic or deleterious. Northwest of the interbedded shales is a thick deposit of a brown shale-derived material. • This material, sampled at Stop #32, has a 3-inch layer of brown clay over weathered shale. 'Che sample has higher clay, carbonate, and sodicity levels and lower EC attd gypsum levels than the other two shale samples. It would not be toxic or deleterious. Verification of SCS mapping. The SCS identified two soil map units inside the rrtil loop. Spicerton variant soils (map unit SA) is mapped along ttte floodplain and terraces of Dry Creek. Two soil types were sampled within this map unit. Field descriptions and analytical results are presented in Appendix A. The Spicerton variant occurs on the second terrace above Dry Creek (see map unit SA on Exhibit 9-1). Dominant vegetation is alkali sagebrusl; and greasewood. Slickspots occur between shrubs. Spicerton variant soils were sampled at stop #16. A 1- to 3-inch loamy A horizon overlies a clayey Bt horizon. Segregated carbonates and gypsum occur at 8 inches at the sampled site. The A horizon is thicker beneath the shrubs. SAR levels are about 13 below 1 inch; EC levels are high below eight inches. Spicerton variant soils are not recommended for topsoil salvage. An unnamed soil occurs along the first terrace as an inclusion in map unit SA. This map unit is identified as SAI on Exhibit 9-1. The unnamed soil, examined at Stops 18 and 1 J, has a loamy surface and subsurface horizons. At the site sampled, Stop #19, segregated -a-