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<br /> <br />Objectives <br /> <br />The objectives of the study were: <br /> <br />~ <br />~ <br />~ <br />~ <br /> <br />1. To determine the costs of converting saline water by each of <br />the six processes using current costs and costing procedures <br />established by OSW. <br /> <br />2. To identify the important cost variables in each process and <br />to project the effects of future changes in the key process <br />parameters on the costs of producing potable water. <br /> <br />Method of Approach <br /> <br />The method of approach followed in this study consisted of the fol- <br />lowing steps: <br /> <br />1. The current economic and technical data available on each <br />process were surveyed. The economic information was adjusted <br />to comply with the ground rule costs established for this <br />study (see Table 3). COnstruction costs were escalated to <br />estimated 1970 costs by assuming sn ENR Index of 1400, and <br />equipment costs were based on a Marshall-Stevens Index <br />of 295. <br /> <br />2. Estimates of plant investment and operating cost were prepared <br />on each process for two conversion plants of widely divergent <br />capacities. The standard costing methods and format used in <br />the study were developed by the Parsons Company for OSW and <br />are reported in R&D Report No. OSW-264.a <br /> <br />3. The unit costs of the important process variables and the key <br />ground rule costs were varied to determine their possible <br />future effects on water costs. The results were then prepared <br />in graphical form. <br /> <br />2 <br />