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<br />. <br /> <br />00254? <br /> <br />. <br /> <br />Arkansas Rivers or their tributaries. The two major constituents <br /> <br />of the dissolved solids in the water produced from these wells are <br /> <br />calcium carbonate and sulfate. Considerable concentrations of sodium <br /> <br />chloride are also found, followed in descending order by magnesium, <br /> <br />nitrate, fluoride, iron and selenium. However, it should be noted <br /> <br />that a great deal of variation exists in the chemical constituents <br /> <br />of the water supplies of the selected communities. Therefore a <br /> <br /> <br />desalting technique found feasible for one type of water supply <br /> <br /> <br />might not be applicable to the water supplies of another community. <br /> <br /> <br />It has long been known that the quality of water can be <br /> <br />improved through various treatment processes. As a corollary to <br /> <br />this, it has also long been known that such treatment is relatively <br /> <br />expensive when considered in terms of the expense of the water with- <br /> <br />out treatment. The economic feasibility of desalting hinges upon <br /> <br />the economic impact of the improved water on the subject communities. <br /> <br />The economic impact for any community is derived from the benefits <br /> <br />measured in dollars to the community over a period of years. For <br /> <br />the purposes of the study, a twenty-year period was used. <br /> <br />Economic feasibility is a difficult matter to determine <br /> <br /> <br />at the best. The study included only those benefits resulting from <br /> <br /> <br />desalting which were tangible. Intangible benefits, including a <br /> <br /> <br />better quality of life and the possibility of increased economic <br /> <br />-5- <br />