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also the location from which raw -water deliveries to the City of Arvada and <br />North Table Mountain Water and Sanitation District are made. R:00357. <br />Mr. Good further <br />tates that since October of 2008, uranium <br />concentrations in Ralston Creek entering Ralston Reservoir have risen steadily <br />to over 500 ug /L. R:00357. Monitoring by Denver Water indicated and the raw <br />water received at the Moffat Treatment Plant "clearly show increased <br />radionuclide concentrations over the course of Cotter's reclamation activities." <br />R:00357. <br />Mr. Good indicated that the Moffat Treatment Plant was not designed to <br />remove uranium, molybdenum, or other metals — any removal is incidental. <br />R:00358. Accordingly, Mr. Good stated that it is uncertain how an increase in <br />uranium would affect treatment capabilities at the plant. R:00358. Mr. Good <br />stated that Denver Water may need to modify its treatment plant and that the <br />financial impact to Denver Water customers "could be enormous, and a violation <br />of the drinking water act <br />standard for uranium could adversely affect the state's <br />economy. It is reasonable that these costs should be borne by Cotter." R:00358. <br />Mr. Good further stated in the letter that in addition to plant modifications, <br />Denver Water would also have to mitigate increased levels of uranium in the <br />plant's sludge, which contains sediment removed from the water. R:00358. Mr. <br />Good stated that the sludge currently meets requirements for beneficial reuse; as <br />radioactive - constituent levels increase, Denver Water may be forced to find a <br />22 <br />