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<br />2. The data herein were obtained to establish the preliminary feasibility <br />of desalting the candidate feedwaters for each selected community by one or <br />more of the desalting processes considered. Final determination of the specif- <br />ic process that would best serve each community should be made only after more <br />rigorous assessment of the data and the performance of an engineering design <br />study. In the case of the all-ion-exchange and combined ion exchange/membrane <br />systems, there are as yet insufficient experimental data on which to base such <br />an engineered plant design. <br /> <br />3. Based on the economic analysis used in this study, installation of a <br />desalting system for La Junta appears economically feasible, with 20-year bene- <br />fits exceeding costs. <br /> <br />4. The intangible benefits which could accrue to the communities from im- <br />proved water could be very significant and should be considered along with the <br />tangible benefits in making decisions concerning installation of desalting sys- <br />tems. <br /> <br />5. For the communities studied, overall annual water costs for desalted <br />water systems are less for communities with metered water supplies than for <br />those with unmetered supplies. <br /> <br />The following recommendations are made as a result of this study: <br /> <br />1. All cities studied should give serious consideration to the installa- <br />tion of a desalting system to improve the quality of their water supplies. <br />This recommendation is applicable particularly to the City of La Junta, for <br />which the economic feasibility appears favorable on the basis of the costs and <br />benefits assumptions and assessments made. <br /> <br />2. At the time desalting systems are installed, or before, communities <br />with unmetered water supplies should also convert to metered supplies since <br />such systems appear to contribute to the achievement of lower water costs as <br />well as better water conservation. <br /> <br />3. The Office of Saline Water should support development of the feasibil- <br />ity of operating the all ion-exchange and combined ion exchange/reverse osmosis <br />desalting systems. <br /> <br />4. The combined ion exchange/reverse osmosis and all ion-exchange desalt- <br />ing systems should be investigated further to verify operational feasibility. <br />If this is done successfully, such systems should be considered for application <br />to improve the quality of water supplies to La Junta, Las Animas, and Ft. Mor- <br />gan. Examination of the application of these systems to the other candidate <br />communities also appears warranted. <br /> <br />020J <br /> <br />3 <br />