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D-5.2 WATER <br /> As discussed in Exhibit G under Water Information, water for solution mining, nahcolite <br /> processing and other plant uses will come from a possible combination of shallow alluvial <br /> wells and a diversion along Yellow Creek, and a deep well on the project site. Underground <br /> pipelines from these water supply sources will be routed to the raw water tank and/or water <br /> storage pond. Underground piping then will be used to route the water to the nahcolite <br /> solution mining wells and process plant uses as shown in the Water Balance (Figure D-6.1). <br /> The water rights which have been applied for will allow instantaneous demands of at least <br /> 449 gpm from the deep water supply well, shallow wells and surface diversion each. This <br /> will initially allow filling the 250,000 gallon raw water tank and 80 acre-feet water storage <br /> pond. Normal operations then will require an approximate average flow of 50 to 70 gpm. <br /> Depending on the pilot plant needs, the water will be treated with chemicals prior to its use. <br /> The treatments will be: <br /> A. Plant Water Softening <br /> B. Boiler Water Treatment <br /> C. Cooling Tower Water Treatment <br /> The following is a description of the treatments and probable chemicals which may be used. <br /> A. PLANT WATER SOFTENING <br /> All of the water supplied to the project will be softened to remove the contained <br /> hardness (primarily calcium and magnesium ions) to avoid the buildup of scale in the <br /> pipelines, and process and utility equipment. Softening will involve the use of an ion <br /> exchange resin and regenerant. Ion exchange resin is used in small vessels and is a <br /> synthetic insoluble material in the form of small spheres. <br /> The regenerant is a solution of a chemical used to restore the capacity of the ion <br /> exchange resin. A solution of approximately 10 percent sodium chloride (salt) will be <br /> used. The sodium chloride brine will be passed through the bed of ion exchange <br /> resin to desorb the hardness (calcium and magnesium ions)from the resin. The <br /> G:\LM1M78545.002\Redamation\Reclamexh.DOC D-4 <br />