The Environmental Protection Agency (EPA) Region 8 announces the deletion of the Operable Unit 1 (OU1), Former Export Plant of the Libby Asbestos Superfund Site (Site) located in Lincoln County, Montana, from the National Priorities List (NPL). The NPL, promulgated pursuant to section 105 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, as amended, is an appendix of the National Oil and Hazardous Substances Pollution Contingency Plan (NCP). This partial deletion pertains to OU1. Operable Unit 2 (OU2), Former Screening Plant, was deleted from the NPL on April 10, 2019. Operable Unit 3 (OU3), Former Vermiculite Mine; Operable Unit 4 and Operable Unit 7 (OU4/OU7), Residential/Commercial Properties of Libby and Troy; Operable Unit 5 (OU5), Former Stimson Lumber Mill; Operable Unit 6 (OU6), BNSF Rail Corridor; and Operable Unit 8 (OU8), Highways and Roadways, are not being considered for deletion as part of this proposed action and will remain on the NPL. The EPA and the State of Montana, through the Montana Department of Environmental Quality, have determined that all appropriate response actions under CERCLA, other than operation and maintenance, monitoring and five-year reviews, have been completed. However, the deletion of these parcels does not preclude future actions under Superfund.