Approval and Promulgation of Implementation Plans; Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants, State of Iowa; Control of Emissions From Existing Hospital/Medical/Infectious Waste Incinerator Units, Negative Declaration and 111(d) Plan Rescission; Approval and Promulgation of Operating Permits Program, State of Iowa

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EPA is proposing to approve, through direct final rulemaking, revisions to the State of Iowa's State Implementation Plan (SIP), Title V program and Clean Air Act (CAA) section 111(d) Plan. The purpose of these revisions is to make general updates to existing state air quality rules, approve an exemption from constructing permitting for engines used in periodic pipeline testing, approve changes to State rules regarding regional haze requirements, and to approve adoption of Federal regulations including the National Ambient Air Quality Standards (NAAQS) for 2008 Ozone, 2008 Lead, and 2010 Nitrogen Dioxide. EPA is proposing approval of the SIP provisions pursuant to section 110 of the CAA. EPA is also proposing to approve the State of Iowa's negative declaration and withdrawal of its section 111(d)/129 plan for Hospital Medical Infectious Waste Incinerators (HMIWI) units. EPA is proposing approval of these actions pursuant to section 111 of the CAA. EPA is also proposing to approve two minor administrative changes to the Title V program, pursuant to section 500 of the CAA.