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Paradox Valley Unit <br /> Proposal for Evaporation Pond <br /> 6. Determine Future Course of Action—Data gathered from the test pond <br /> will help determine if large-scale permanent evaporation ponds are <br /> appropriate moving forward. It will provide essential information and <br /> reduce the risk and liability that would be incurred if a full-scale <br /> evaporation pond project were constructed without first observing the <br /> environmental effects and performance of a small test pond. <br /> Conceptual Design <br /> The proposed pond would be constructed by clearing the site of all vegetation, <br /> grading, and compacting embankment material to form level terraces with earthen <br /> dikes on the down slope side of each terrace (See Figures 2 and 3). The surfaces <br /> would provide maximum surface area for evaporation of the brine. A flexible <br /> PVC membrane or appropriate imported clay material will be placed as pond <br /> lining if soil tests performed during the design phase indicate the on-site soils do <br /> not provide adequate protection against brine seeping into the ground. <br /> Drainage Around <br /> the Pond <br /> Proposed New Dikes <br /> f <br /> f <br /> f � . <br /> f <br /> i � <br /> Existing Dike <br /> Figure 2—Plan View of Conceptual Pond Design(Not to Scale) <br /> 6 <br />