From 1943 to 1989, the Hanford Nuclear Reservation produced weapons grade plutonium and approximately 212,000 cubic meters of mixed radioactive and hazardous chemical waste, filling 177 aging underground tanks. It is assumed that 90% of this waste is “Low Activity Waste” after cesium, strontium, and transuranics are removed. In late 2025, the Direct Feed Low Activity Waste facility began vitrification, i.e., mixing liquid waste with molten glass at 1150 °C, thereby destroying hazardous organic chemicals. To continuously maintain heat in the two 300-ton melters, approximately 200,000 megawatt-hours of electricity are required annually. Over their 40-year lifetimes, these vitrification melters generate approximately 3,000,000 tonnes of carbon dioxide. This carbon footprint could be reduced by “grouting” a substantial portion of the waste, i.e., mixing the waste with Portland cement, granulated slag, and fly ash. In a recent agreement, the Washington State Department of Ecology agreed in principle to grouting, provided that the resulting grout is shipped to a dedicated off-site radioactive waste disposal facility. This would reduce Hanford’s carbon footprint even after accounting for the CO2 from transportation.