United Nuclear Corp. has agreed to clean up its share of uranium contamination at a site located on the Navajo Nation. Contaminated soil at the abandoned Northeast Church Rock Mine near Gallup, New Mexico, will be replaced with fresh soil at a cost of about $5 million, reports Felicia Fonseca of the Associated Press. United Nuclear operated a mine at the 125-acre site between 1967 and 1982. Still undetermined is the question of what to do with the waste material once it’s been removed. Public comment on various waste disposal plans is open through Sept. 9.