The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Maine. This revision amends the definition of ``Ozone Transport Region'' in the State's Chapter 100 Definitions Regulation and revises language in the State's Chapter 113 Growth Offset Regulation regarding applicability of Nonattainment New Source Review in areas that, at a future date, may not be within the Ozone Transport Region. This action is being taken under the Clean Air Act (CAA).

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Placer County Air Pollution Control District (PCAPCD) portion of the California State Implementation Plan (SIP). These revisions concern emissions of oxides of nitrogen (NO<INF>X</INF>) and particulate matter (PM) from open burning. We are approving local rules that regulate these emission sources under the Clean Air Act (CAA or the Act).

The Environmental Protection Agency (EPA) is proposing to approve revisions to the Iowa State Implementation Plan (SIP) to include recent changes to the Polk County Board of Health Rules and Regulations in addition to revisions from past submittals. The proposed revisions update definitions and references to the effective dates of Federal rules approved into the State's SIP, prohibit burning of demolished buildings, update references to methods and procedures for performance test/stack test and continuous monitoring systems, and revise permitting exemptions.

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Missouri State Implementation Plan (SIP) submitted by the State of Missouri on January 15, 2019, and supplemented by letter on July 11, 2019. Missouri requests that the EPA remove a rule related to control of emissions from the application of deadeners and adhesives in the St. Louis, Missouri area from its SIP. This rescission does not have an adverse effect on air quality and meets the requirements of the Clean Air Act (CAA).