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<br />, <br /> <br />~. <br /> <br />.... <br />. . <br /> <br />~ <br /> <br />c tower operation would be at 13 cycles of concentration. Softening and <br />filtration of the blowdown water would be required before introduction <br />to the reverse osmosis equipment. Concentrated wastes would be sent <br />to evaporation ponds which would require approximately 164 acres. <br /> <br />7. Pretreatment and Flash Evaporation (Option 4c). Flash evapo- <br />ration equipment would be used for treatment of the cooling tower blow- <br />do\V!l water with pl~~t makeup water pretreatnent and cooling tower water <br />concentrations as described above. <br /> <br />Even though the report did not include cost information on any <br />of the schemes, the above described seven schemes were presented as <br />being less economical than returning the blowdown water directly to <br />Lake Powell. <br /> <br />3 . <br />