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EPA/OAR RIN: 2060-AV05 Publication ID: Fall 2020 
Title: ●Revised Response to Clean Air Act Section 126(b) Petition From Maryland 
Abstract: This action is a revised response to CAA section 126(b) petition from Maryland. In 2016, Maryland submitted a single petition alleging good neighbor violations by 36 electric generating units (EGUs) in five states with respect to the 2008 ozone NAAQS. Also in 2016, Delaware submitted four petitions, each alleging good neighbor violations by individual sources located in Pennsylvania or West Virginia with respect to the 2008 and 2015 ozone NAAQS. EPA previously denied all of the petitions in 2018. Petitioners challenged the denial and on May 19, 2020, the D.C. Circuit remanded EPA's denial as to four EGUs with selective non-catalytic reductions identified in the Maryland petition. This action addresses the Court's remand and provides a revised response to the petition. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Not subject to, not significant 
CFR Citation: Undetermined     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: "Not Yet Determined"   
Legal Deadline:
Action Source Description Date
Action Date FR Cite
NPRM  04/00/2021 
Final Rule  To Be Determined 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: State 
Small Entities Affected: Undetermined  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Elizabeth Palma
Environmental Protection Agency
Office of Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-5432