The Department of Energy’s Office of Environmental Management said it has reached a regulatory milestone ahead of schedule in preparing radioactive waste tanks for closure at the Savannah River Site in South Carolina. DOE-EM said it received concurrence in January from the South Carolina Department of Environmental Services (SCDES) and the U.S. Environmental Protection Agency that SRS had successfully removed waste from the site’s Tank 4 and may now proceed to waste sampling and analysis of that tank ahead of its closure.