Approval and Promulgation of Air Quality Implementation Plans, State Plans for Designated Facilities and Pollutants, and Operating Permits Program; State of Missouri

The Environmental Protection Agency (EPA) is taking direct final action to approve revisions to the State Implementation Plan (SIP) and the operating permits program for the State of Missouri which were received on November 6, 2013, November 20, 2014, March 27, 2014, July 7, 2014, and July 14, 2014. The revisions submitted by the state include amendments to rules relating to reference methods, definitions and common reference tables, ambient air quality standards, and a rule rescission related to air quality control measures for sources clustered in small land areas. Many of the revisions are administrative in nature and either incorporate by reference or update state rules to match Federal regulations. Some are more substantive, but are non- controversial. In addition, they provide more clarity for the regulated public. This direct final action will amend the SIP to include revised regulations which will then be more consistent with Federal regulations. These revisions do not have an adverse effect on air quality. EPA's approval of these rule revisions is being done in accordance with the requirements of the Clean Air Act (CAA).