Air Plan Approval; Pennsylvania; Proposed Revision to Philadelphia Gas Works, Richmond Plant Reasonably Available Control Technology Plan Under the 1997 8-Hour Ozone National Ambient Air Quality Standards

The Environmental Protection Agency (EPA or "the Agency") is proposing to approve a State implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania. In this rulemaking, the EPA proposes to approve a revision to the reasonably available control technology (RACT) Plan for the Philadelphia Gas Works, Richmond Plant (PGW Richmond), a major source of nitrogen oxides (NO<INF>X</INF>). The proposed revision would remove a condition from the RACT Plan Approval, previously incorporated into Pennsylvania's SIP on October 7, 2016. The proposed revision results in no change of emission allowances under RACT. This action is being taken under the Clean Air Act (CAA).