{"abstract":"The Environmental Protection Agency (EPA) is proposing three distinct actions, including Emission Guidelines for Greenhouse Gas Emissions from Existing Electric Utility Generating Units (EGUs). First, EPA is proposing to replace the Clean Power Plan (CPP) with revised emissions guidelines (the Affordable Clean Energy (ACE) rule) that inform the development, submittal, and implementation of state plans to reduce greenhouse gas (GHG) emission from certain EGUs. In the proposed emissions guidelines, consistent with the interpretation described in the proposed repeal of the CPP, the Agency is proposing to determine that heat rate improvement (HRI) measures are the best system of emission reduction (BSER) for existing coal-fired EGUs. Second, EPA is proposing new regulations that provide direction to both EPA and the states on the implementation of emission guidelines. The new proposed implementing regulations would apply to this action and any future emission guideline issued under section 111(d) of the Clean Air Act (CAA). Third, the Agency is proposing revisions to the New Source Review (NSR) program that will help prevent NSR from being a barrier to the implementation of efficiency projects at EGUs.","action":"Proposed rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2018/08/31/2018-18755.html","cfr_references":[{"chapter":null,"citation_url":null,"part":51,"title":40},{"chapter":null,"citation_url":null,"part":52,"title":40},{"chapter":null,"citation_url":null,"part":60,"title":40}],"citation":"83 FR 44746","comment_url":null,"comments_close_on":"2018-10-01","correction_of":null,"corrections":[],"dates":"Comments. Comments must be received on or before October 30, 2018. Under the Paperwork Reduction Act (PRA), comments on the information collection provisions are best assured of consideration if the Office of Management and Budget (OMB) receives a copy of your comments on or before October 1, 2018.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2017-0355","FRL-9982-89-OAR"],"dockets":[{"supporting_documents":[{"title":"Kamita Gray, Citizen, Public Hearing Testimony: Proposed Repeal of Clean Power Plan for Existing Power Plants, Charleston, WV - Room 208W, 11/29/2017","document_id":"EPA-HQ-OAR-2017-0355-6871"},{"title":"Danielle Walker, Moms Clean Air Force, Public Hearing Testimony: Proposed Repeal of Clean Power Plan for Existing Power Plants, Charleston, WV - Room 451M, 11/28/2017","document_id":"EPA-HQ-OAR-2017-0355-6857"},{"title":"Maria Ibarra Rodriguez, Citizen, Public Hearing Testimony: Proposed Repeal of Clean Power Plan for Existing Power Plants, Charleston, WV - Room 451M, 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