Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Regulatory Amendments Addressing Reasonably Available Control Technology Requirements Under the 1997 and 2008 8-Hour Ozone National Ambient Air Quality Standards

The Environmental Protection Agency (EPA) is proposing rulemaking action on a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania (Pennsylvania or the Commonwealth). This revision consists of regulatory amendments intended to meet certain reasonably available control technology (RACT) requirements under the 1997 and 2008 8-hour ozone national ambient air quality standards (NAAQS). EPA is proposing to approve most parts of the Pennsylvania SIP revision as meeting RACT requirements under the Clean Air Act (CAA). EPA is also proposing to conditionally approve certain provisions of this SIP revision, based upon Pennsylvania's commitment to submit additional enforceable measures that meet RACT. This action is being taken under the CAA.