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• Comment <br />3-8 - Precipitation (production of sludge) has been significantly <br />reduced in Ponds 1 and 2 since October 19, 1976, when the <br />addition of lime and ferric sulfate was discontinued. This <br />would indicate an increase of suspended particulates being <br />discharged into the stream with subsequent higher readings <br />of radioactivity. <br />Response <br />Cotter has consistently been in compliance with the condi- <br />tions of NPDES permit number CO-0001244, <br />Comment <br />It is suggested that all available treatment procedures be <br />used to reduce suspended particulates in the discharge. <br />Effluent monitoring by Cotter, starting in 1974 show that 11 <br />samples violate permit limits: <br />Permit Limit <br />• <br />Iron <br />Uranium <br />Barium <br />Radium 226 <br />Response <br />Quantity Found <br />05 .55 .58 .93 <br />6.8 5.47 <br />1.6 1.5 <br />5 4.8 3.4 6.4 <br />Comments concerning the water treatment plant are covered b~~ <br />the permit for that facility. The new sorter wash circuit <br />has also eliminated these problems. <br />Comment <br />3-7 - Thickened ore sorter water (contining 30% moisture) is added <br />to upgraded ore and trucked to the mill, The report did noi; <br />address whether runoff or seepage occurs from the thickened <br />ore. <br />Response <br />In response to a request by the Jefferson County Department <br />of Health, the Colorado Department of Health collected <br />samples from roadways along the route used by the trucks an~i <br />found concentration of uranium within the average for the <br />Front Range of Colorado. Ore piles are confined to concrete <br />pads at the ore shipment pad and at the ore sorter. Attach~ad <br />is a copy of this letter. <br />• <br />See Attachment <br />JC-2 <br />