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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division <br />Rationale β€” Page 4, Permit No. C00036251 <br />water is pumped to the surface water treatment plants. The process water from the dumps is currently <br />discharged through the stormwater drainage channels. <br />3. Chemicals Usage β€”The permittee stated in the renewal application that they utilize two chemicals in <br />their treatment process. These chemicals are summarized in Table IV -1. <br />Table IV-1 β€” Chemical Additives <br />Chemical Name Purpose Constituents of Concern Acceptable? <br />Yes or No <br />Barium Chloride <br />Nalclear 8184 Flocculant Settle solids <br />Precipitate Ra -226 Barium Chloride Yes <br />Ethoxylated Alcohol Yes <br />Chemicals deemed acceptable for use in waters that will or may be discharged to waters of the State are <br />acceptable only when used in accordance with all state and federal regulations, and in strict accordance <br />with the manufacturer's site - specific instructions. <br />B. Wastewater Treatment Description <br />The wastewater treatment processes at JD -7 and JD -9 mines are similar. Water from the mines is <br />pumped to the surface, treated with a 3% barium chloride solution, and then allowed to precipitate and <br />settle in two hypalon -lined ponds, connected in series. As noted in the last permit rationale, waste <br />sludge removed from the lagoons is characterized prior to being transported to the Cotter Corporation <br />Canon City uranium milling facility for disposal in the tailings impoundments at that location. The <br />Cotter Canyon City Mill Disposal site is a licensed radioactive materials disposal site under the <br />jurisdiction of the Hazardous Materials and Waste Management Division of the Colorado Department of <br />Public Health and Environment. <br />The mine facilities are intermittent operations. The last discharge reported for JD -7 and JD -9 mines were <br />on June 30, 2006. <br />V -notch weirs are used at outfalls OO1A and 002A for effluent flow measurement. <br />Pursuant to Section 100.6.2 of the Water and Wastewater Facility Operator Certification Requirements, <br />this facility will require a Class B certified operator. <br />V. PERFORMANCE HISTORY <br />A. Monitoring Data <br />1. Discharge Monitoring Reports for JD -7, Outfall 001A β€” Table V -1 a summarizes the effluent data <br />reported on the Discharge Monitoring Reports (DMRs) for the Cotter Corporation wastewater <br />treatment facility from October 31, 2005 to June 30, 2006. <br />