A new report released by the U.S. Government Accountability Office states that the Department of Energy’s Office of Environmental Management (EM) has disposed of more than 16 million tons of radioactive and hazardous waste from the Moab Mill Site. While cleanup continues at the Cold War–era uranium ore processing site in southeastern Utah, a plan for the next phase of groundwater remediation is still needed, according to the GAO.

Recent testing of a monitoring well in Minnesota near the Mississippi River detected tritium levels just below the safety standards set by the Environmental Protection Agency, Xcel Energy reported this week.

Researchers at Savannah River National Laboratory (SRNL), in concert with Lawrence Berkeley National Laboratory, Massachusetts Institute of Technology, Pacific Northwest National Laboratory, and Florida International University, are leading the Advanced Long-Term Environmental Monitoring Systems (ALTEMIS) project to move groundwater cleanup from a reactive process to a proactive process, while also reducing the cost of long-term monitoring and accelerating site closure.

Hanford’s largest groundwater treatment plant, the 200 West Pump and Treat Facility, removes tons of chemical and radioactive contaminants from more than 2 billion gallons of groundwater each year. Photo: DOE/OEM

Fiscal year 2020 marks the sixth consecutive year that the Hanford Site, in southeastern Washington State, has treated more than 2 billion gallons of groundwater to remove contamination from decades of past operations to produce plutonium for the U.S. nuclear weapons program.

The goal this fiscal year, which ends September 30, is to treat at least 2.4 billion gallons, the Department of Energy reported on September 8.