{"abstract":"In this action, the Environmental Protection Agency (EPA) is concluding the reconsideration of an earlier action that the EPA published on January 15, 2009, titled \"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation and Project Netting.\" The 2009 action--hereafter referred to as \"2009 NSR Aggregation Action\"--clarified implementation of the New Source Review (NSR) permitting program under the Clean Air Act (CAA or Act) with respect to treating related physical or operational changes as a single \"modification\" for the purpose of determining NSR applicability at a stationary source. On April 15, 2010, the EPA proposed to revoke the 2009 NSR Aggregation Action. After a review of the public comments received on that proposal, the EPA has now decided to not revoke the 2009 NSR Aggregation Action. The EPA is, therefore, retaining the interpretation set forth in the 2009 NSR Aggregation Action, while not adopting any changes to the relevant rule text. At the same time, the EPA is using this present action to clarify the implications of the 2009 NSR Aggregation Action for EPA-approved permitting programs. This action also lifts the administrative stay and announces the effective date of the 2009 NSR Aggregation Action.","action":"Final action; lifting of administrative stay and announcement of effective date.","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/2018/11/15/2018-24820.html","cfr_references":[{"chapter":null,"citation_url":null,"part":51,"title":40},{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"83 FR 57324","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This action is effective on November 15, 2018.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2003-0064","FRL-9986-47-OAR"],"dockets":[],"document_number":"2018-24820","effective_on":"2018-11-15","end_page":57333,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2018/11/15/2018-24820.xml","html_url":"https://www.federalregister.gov/documents/2018/11/15/2018-24820/prevention-of-significant-deterioration-psd-and-nonattainment-new-source-review-nnsr-aggregation","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2018-24820?publication_date=2018-11-15","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2018-11-15/2018-24820/mods.xml","not_received_for_publication":null,"page_length":10,"page_views":{"count":4527,"last_updated":"2026-10-25 06:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2018-11-15/pdf/2018-24820.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2018-24820.pdf?1542203119","publication_date":"2018-11-15","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2018/11/15/2018-24820.txt","regulation_id_number_info":{"2060-AP80":{"issue":"201810","html_url":"https://www.federalregister.gov/regulations/2060-AP80/reconsideration-of-the-prevention-of-significant-deterioration-and-nonattainment-new-source-review-n","title":"Reconsideration of the Prevention of Significant Deterioration and Nonattainment New Source Review (NSR) Project Aggregation","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201810&RIN=2060-AP80&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2060-AP80"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Business Roundtable comments on EPA's solicitation “Evaluation of Existing Regulations” (82 FR 17793; April 13, 2017) (Docket ID No. EPA-HQ OA-2017-0190)","document_id":"EPA-HQ-OAR-2003-0064-0192"},{"title":"Air Permitting Forum comments on DOC's Request for Information “Impact of Federal Regulations on Domestic Manufacturing” (82 FR 12786; March 7, 2017) (Docket ID No. 170302221–7221–01)","document_id":"EPA-HQ-OAR-2003-0064-0191"},{"title":"American Forest & Paper Association comments on EPA's solicitation “Evaluation of Existing Regulations” (82 FR 17793; April 13, 2017) (Docket ID No. EPA-HQ-OA-2017-0190)","document_id":"EPA-HQ-OAR-2003-0064-0189"},{"title":"Project Aggregation Reconsideration Final Notice - PDF of version entered into ROCIS on 7-5-18 (Pre-Interagency Review)","document_id":"EPA-HQ-OAR-2003-0064-0187"},{"title":"9-27-18 email from EPA to OMB transmitting revised clean and redline/strikeout versions of the Project Aggregation Reconsideration Final Notice","document_id":"EPA-HQ-OAR-2003-0064-0186"},{"title":"9-25-18 email from OMB to EPA transmitting comments and edits on the Project Aggregation Reconsideration Final Notice","document_id":"EPA-HQ-OAR-2003-0064-0185"},{"title":"9-19-18 email from EPA to OMB transmitting revised clean and redline/strikeout versions of the Project Aggregation Reconsideration Final Notice","document_id":"EPA-HQ-OAR-2003-0064-0184"},{"title":"8-24-18 email from OMB to EPA transmitting comments and edits on the Project Aggregation Reconsideration Final Notice","document_id":"EPA-HQ-OAR-2003-0064-0183"},{"title":"Presidential Memorandum:  Streamlining Permitting and Reducing Regulatory Burdens for Domestic Manufacturing (January 24, 2017)","document_id":"EPA-HQ-OAR-2003-0064-0180"},{"title":"Response to Public Comments on Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation; Reconsideration","document_id":"EPA-HQ-OAR-2003-0064-0176"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2003-0064","supporting_documents_count":73,"docket_id":"EPA-HQ-OAR-2003-0064","regulation_id_number":null,"title":"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR):  Debottlenecking, Aggregation, and Project Netting","checked_regulationsdotgov_at":"2018-12-05T11:00:16Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":57324,"subtype":null,"title":"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR): Aggregation; Reconsideration","toc_doc":"Prevention of Significant Deterioration and Nonattainment New Source Review: Aggregation; Reconsideration","toc_subject":null,"topics":[],"type":"Rule","volume":83}