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<br />. <br /> <br />Table 2 <br />APPRAISAL ANALYSIS OF DESALTING ALTERNATIVES <br />La Verkin Springs Unit, Utah <br /> <br /> Salinity <br />Alternative Product Reduction Total <br /> Water at Annual <br />(Desalting (Pretreatment Salinity Imperial Investment Annual Equiv Cost Effectiveness~/ l/ <br />Process) Process) (mg/L) (mg/L) l/ Costs Y O&M Costs Y Cost l/ S/mg/L S/Ton <br />Desalting Alternatives <br />70% RO; Lime-Soda Ash 286 8.4 85,480 2,800 8,900 1,060 113 <br />(Feasibility Plan) <br />70% RO; Ion Exchange 286 8.4 87,000 2,410 8,610 1,030 109 <br />70% ED; Ion Exchange 944 8.0 88,500 2,650 8,950 1,120 118 <br />70% ED; Lime-Soda Ash 944 8.0 86,900 3,040 9,240 1,160 122 <br />80% RO; Ion Exchange 374 8.3 71,600 2,200 7,310 880 93 <br />80% RO; Lime-Soda Ash 374 8.3 70,500 3,030 8,060 970 102 <br />90% ED; Ion Exchange 994 7.8 66,000 2,500 7,200 923 98 <br />90% ED; Lime-Soda Ash 994 7.8 65,100 3,510 8,150 1,040 110 <br />Brine Injection Alternative <br />70% R~ Ion Exchange 286 8.4 45,600 2,530 5,780 690 73 <br />l'j 1/ All costs in thousands of dollars based on October 1978 prices. <br />Ul <br />1',-, 2/ Cost of salinity reduction at Imperial Dam. <br />--oJ J/ Based on the annual equivalent for 50 years at 6-7/8 percent interest. <br />