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C~ <br />-z- <br />the same general drainage area. Three sites were initially identified <br />by Energy Fuels personnel. The locations of the selected sites are <br />shown on Fig. 2. Area I is a very gently sloping valley bottom lo- <br />cated east of the existing Naul Road 'C' and north of the area currently <br />being mined. Area II is a large sloping area near the southwest end of <br />the proposed Eckman Park Mine. Area III is along a moderately sloping <br />ridge. This area had such limited potential for storage volume that it <br />was dropped from consideration after the exploratory borings were drilled. <br />GENERAL GEOLOGIC CONDITIONS <br />The general geologic conditions at the site have been mapped, in <br />• detail, by Energy Fuels geologic staff. The entire area is underlain at <br />relatively shallow depths by the Williams Fork Formation which is a <br />part of the Upper Cretaceous Mesa Verde Group. Within the area of the <br />proposed mining and spoil disposal, the Williams Fork Formation includes <br />a sandstone series which is fine to very fine grained sandstone inter- <br />bedded with thin beds of siltstone and shale. The sandstone is a light <br />gray color. There are massive marine shale members within the formation. <br />The shale series are predominantly claystones with some siltstones. Gen- <br />erally, the shales are darker gray in color. The soils which mantle the <br />surface are probably the result of in-place weathering of the formation <br />materials. The thickness of surficial soils ranges from nearly zero to <br />as much as 10 feet on the upper, higher portions of the site. In the <br />valley area our borings have encountered up to 20 feet of soft to medium <br />• stiff residual clays. The bedrock formations are relatively impervious <br />