The EPA maintains a list of documents and updates for the 8 Operable Units (OUs) in the Libby Superfund site. These OU documents contain maps of each OU area, resident and analyst commentary, data reports and more for each Operable Unit in the Libby Superfund Site cleanup area. The links below will take you to the constantly updated EPA website where you can view various files for each of the 8 Libby Operable Units.