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<br /> <br /> 23 <br />Further, CAM is required by the USFWS conservation measures to line the three <br />sediment ponds. This will effectively prevent seepage of water and dissolved <br />constituents and mobilization of contaminants in pond substrates. Water from the <br />sediment ponds will not leach into the shallow alluvial groundwater. According to <br />pond operations discussed in Section 2.05.3(4)(a)(ii)(C), the pond(s) will be dewatered <br />within 48 hours of a precipitation event and any time sediment in any of the ponds <br />exceeds its approved maximum sediment elevation. Sediment and water removed <br />from the ponds will be disposed of at an approved disposal facility. CAM therefore <br />concludes that the Loadout does not have the potential to negatively impact <br />groundwater quality in the shallow alluvium. <br /> <br />IV. Topsoil <br /> <br />Baseline soils information is found in Exhibit 7 in Volume 1 of the PAP. A discussion of <br />the potential productivity of the soils was obtained from the NRCS Soil Survey of Grand <br />Junction Area, Colorado and included in Section 2.04.9 of the PAP. <br /> <br />All available topsoil will be salvaged from the areas to be disturbed after vegetation cover <br />that would interfere with the use of the topsoil is cleared. Sagebrush, forbs, and grasses <br />will not be cleared prior to topsoil salvage. Tamarisk will be cleared from areas prior to <br />topsoil salvage. Since the area from which topsoil will be salvaged is to be reclaimed as <br />fish and wildlife habitat and there is no prime farmland in the proposed permit areas, all <br />suitable topsoil horizons will be salvaged together. Two topsoil stockpiles will be <br />constructed. One will be located near the facilities area and the other one will be located <br />on the west side of Reed Wash. <br /> <br />A total of 38.1 acres will be disturbed during construction of the rail spur and loadout <br />facilities. As can be seen on Map 19, Previously Disturbed Area, a significant portion of <br />the disturbed areas east of Reed Wash is industrial and has been previously disturbed, so <br />no topsoil is available for salvage in those areas. Of the 38.1 disturbed acres, topsoil will <br />be salvaged from 12.6 acres. <br /> <br />The Division is proposing to grant a variance for topsoil removal in the industrial areas in <br />accordance with Rule 4.06.2(2)(a). The industrial areas were previously disturbed by the <br />activities associated with the adjacent, now closed, gilsonite/petroleum refinery. These <br />areas consist of evaporation ponds which are void of vegetation and currently have an odor. <br />The Division has determined that there is no suitable soil available for salvage in the <br />industrial area. <br /> <br />Selected overburden materials are not planned to be used for or as a supplement to topsoil. <br /> <br />V. Sealing of Drilled Holes and Underground Openings <br /> <br />There are no holes proposed to be drilled, or underground openings proposed, at this site. <br /> <br />VI. Use of Explosives <br />