The Oak Ridge Reservation is one of the largest U.S. Department of Energy (DOE) facilities in the country, with areas that are highly contaminated by chemicals, metals, and radionuclides. DOE is in the middle of a multi-decade, multi-billion-dollar cleanup there, and a recent Superfund decision for one portion of the site raises a number of significant legal issues. This Article addresses some related questions: Should radionuclides get less stringent cleanup than other equally harmful pollutants like mercury and polychlorinated biphenyls?