Approval and Promulgation of Air Quality Plans; State of Maryland; Control of Emissions From Existing Hospital/Medical/Infectious Waste Incineration Units

The Environmental Protection Agency (EPA) is proposing to approve a section 111(d)/129 plan submitted by the State of Maryland for existing hospital/medical/infectious waste incineration (HMIWI) units. The section 111(d)/129 plan contains revisions to a previously- approved state plan for existing HMIWI units and was submitted as a result of the October 6, 2009 promulgation of federal new source performance standards (NSPS) and emission guidelines for HMIWI units, which were subsequently amended on April 4, 2011. This action is being taken under sections 111(d) and 129 of the Clean Air Act (CAA).