Approval and Promulgation of Implementation Plans; Alaska: Updates to Incorporation by Reference and Miscellaneous Revisions

The Environmental Protection Agency (EPA) is approving, and incorporating by reference, State Implementation Plan revisions submitted by Alaska on May 12, 2015. The revisions updated the incorporation by reference of certain Federal provisions, revised rules to reflect changes to Federal permitting requirements and the 2013 redesignation of the Mendenhall Valley area of Juneau, and made minor clarifications to Alaska air quality rules. We note that the May 12, 2015 submission also included transportation conformity and infrastructure requirements. These requirements are not being addressed in this action. We approved the transportation conformity revisions in a previous action on September 8, 2015, and we intend to address the infrastructure requirements in a separate, future action.