The EPA is approving a site-specific revision to the Minnesota particulate matter (PM) State Implementation Plan (SIP) for Metropolitan Council Environmental Service's (MCES) Metropolitan Wastewater Treatment Plant located on Childs Road in St. Paul, Ramsey County, Minnesota. By its submittal dated June 1, 2001, the Minnesota Pollution Control Agency (MPCA) requested that EPA approve MCES's federally enforceable state operating permit (FESOP) into the Minnesota PM SIP and remove the MCES Administrative Order from the state PM SIP. The request is approvable because it satisfies the requirements of the Clean Air Act (Act). The rationale for the approval and other information are provided in this rulemaking action.