Approval and Promulgation of Air Quality Implementation Plans; Minnesota

EPA is approving a request submitted by the Minnesota Pollution Control Agency (MPCA) on May 7, 2010, to revise the Minnesota State Implementation Plan (SIP) for particulate matter less than 10 microns (PM<INF>10</INF>). The approval revises the Minnesota SIP by updating information for the Metropolitan Council Environmental Services (MCES) Metropolitan Wastewater Treatment Plant located in St. Paul, Minnesota. The revision reflects changes at the facility which include the decommissioning of six multiple hearth incinerators and associated equipment and the addition of three fluidized bed incinerators and associated equipment. These revisions are included in a joint Title I/Title V document for the MCES Metropolitan Wastewater Treatment Plant, which replaces the document currently approved in the SIP for the facility. These revisions will result in reducing the PM<INF>10</INF> emissions in the St. Paul area, and strengthen the existing PM<INF>10</INF> SIP.