{"abstract":"The EPA is taking final action on one part of the September 14, 2006 Federal Register proposed rule for the New Source Review (NSR) program. The purpose of the proposed rule was to clarify for sources and permitting authorities three aspects of the NSR program-- aggregation, debottlenecking, and project netting--that pertain to how to determine what emissions increases and decreases to consider in determining major NSR applicability for modified sources. This final action addresses only aggregation. This action retains the current rule text for aggregation and interprets that rule text to mean that sources and permitting authorities should combine emissions when activities are \"substantially related.\" It also adopts a rebuttable presumption that activities at a plant can be presumed not to be substantially related if they occur three or more years apart. With respect to the other two components of the originally proposed rule, the EPA is taking no action on the proposed rule for project netting and, by way of a separate document published in the \"Proposed Rules\" section of this Federal Register, is withdrawing the proposed provisions for debottlenecking.","action":"Final action.","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/2009/01/15/E9-815.html","cfr_references":[{"chapter":null,"citation_url":null,"part":51,"title":40},{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"74 FR 2376","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on February 17, 2009.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2003-0064, FRL-8762-8"],"dockets":[],"document_number":"E9-815","effective_on":"2009-02-17","end_page":2383,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2009/01/15/E9-815.xml","html_url":"https://www.federalregister.gov/documents/2009/01/15/E9-815/prevention-of-significant-deterioration-psd-and-nonattainment-new-source-review-nsr-aggregation-and","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E9-815?publication_date=2009-01-15","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2009-01-15/E9-815/mods.xml","not_received_for_publication":null,"page_length":8,"page_views":{"count":2874,"last_updated":"2026-08-26 22:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2009-01-15/pdf/E9-815.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2009-01-15","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2009/01/15/E9-815.txt","regulation_id_number_info":{"2060-AL75":{"issue":"200904","html_url":"https://www.federalregister.gov/regulations/2060-AL75/prevention-of-significant-deterioration-psd-and-nonattainment-new-source-review-nsr-aggregation","title":"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=200904&RIN=2060-AL75&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2060-AL75"],"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":"2011-11-15T10:19:50Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":2376,"subtype":null,"title":"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation and Project Netting","toc_doc":"Aggregation and Project Netting","toc_subject":"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR):","topics":["Administrative practice and procedure","Air pollution control","Environmental protection","Intergovernmental relations","Reporting and recordkeeping requirements"],"type":"Rule","volume":74}