Environmental Protection Agency June 26, 2007 – Federal Register Recent Federal Regulation Documents

EPA proposes to approve a revision to the Iowa State Implementation Plan (SIP). The purpose of this revision is to update the Polk County Board of Health Rules and Regulations, Chapter V, Air Pollution. These revisions reflect updates to the Iowa statewide rules previously approved by EPA and will ensure consistency between the applicable local agency rules and Federally-approved rules.

EPA is proposing to approve the actions of the Idaho Department of Environmental Quality (IDEQ) an the Washington State Department of Ecology (Ecology) to address the provisions of Clean Air Act section 110(a)(2)(D)(i) for the 8-hour ozone and PM2.5 National Ambient Air Quality Standards (NAAQS). These provisions require each state to submit a State Implementation Plan (SIP) revision that prohibits emissions that adversely affect another state's air quality through interstate transport. EPA is proposing to approve IDEQ's and Ecology's SIP revisions because they adequately address the four distinct elements related to the impact of interstate transport of air pollutants for their states. These include prohibiting emissions that contribute significantly to nonattainment of the NAAQS in another state, interfere with maintenance of the NAAQS by another state, interfere with plans in another state to prevent significant deterioration of air quality, or interfere with efforts of another state to protect visibility.