| Abstract |
The Rocky Flats Plant (RFP) (USDOE) (OU4) site is part of the 6,500-acre nuclear weapons research, development, production, and plutonium processing complex in Jefferson County, Colorado. Since 1951, the Department of Energy (DOE) has used the site to manufacture components of nuclear weapons; process plutonium; fabricate, machining, and assemble components from metals. The central portion of RFP contains the Solar Evaporation Pond (SEPs) Waste Management Unit, including Ponds 207-A, 207-B North, 207-B Center, 207-B South, 207-C, and the Interceptor Trench System (ITS). The SEPs were formerly used to store and treat liquid process waste having less than 100,000 picocuries (pci/l) per liter of total long-lived alpha activity. The interim ROD addresses management and treatment of liquids contained in ponds 207-A, 207-B North, 207-B Center, 207-B South, and the water collected by the ITS as the OU4 at the site. The primary contaminants of concern affecting the surface water are VOCs, including TCE and carbon tetrachloride; metals, including chromium; and radioactive materials. |
