The Environmental Protection Agency (EPA) is approving the Minnesota State Plan submittal for implementing the Municipal Waste Combustor (MWC) Emission Guidelines. The State's plan was submitted to EPA on April 28, 1998. This submittal was made to satisfy the requirement of the 1990 Clean Air Act (CAA) that all MWCs with the capacity to combust greater than 250 tons per day (tpd) of Municipal Solid Waste (MSW) adopt the emission standards as published in the Federal Register on December 19, 1995 and in a subsequent Federal Register on August 27, 1997. The State's submittal was made in accordance with the requirements for adoption and submittal of State Plans for designated facilities in 40 CFR part 60, subpart B. The EPA finds that Minnesota's Plan for existing MWCs adequately addresses all of the Federal requirements applicable to such plans. If adverse comments are received on this action, the EPA will withdraw this final rule and address the comments received in response to this action in a final rule on the related proposed rule, which is being published in the proposed rules section of this Federal Register. A second public comment period will not be held. Parties interested in commenting on this action should do so at this time. This approval makes the State's plan federally enforceable.