{"abstract":"The EPA proposes revisions to the regulations governing the major NSR programs mandated by parts C and D of title I of the Clean Air Act (CAA). These proposed changes reflect EPA's consideration of the Agency's 2002 Report to the President and its associated recommendations as well as discussions with various stakeholders including representatives of environmental groups, State and local governments, and industry. We propose to change how emissions from emissions units upstream or downstream from the unit(s) undergoing a physical change or change in the method of operation are included in the calculation of an emissions increase for the project. Also, these proposed changes would clarify and codify our policy of when emissions increases from multiple projects are to be aggregated together to determine NSR applicability. Finally, we are clarifying how emissions decreases from a project may be included in the calculation to determine if a significant emissions increase will result from a project. We intend the proposed rules to improve implementation of the program by articulating and codifying principles for determining major NSR applicability that we currently address through guidance only. We are seeking comment on all aspects of this proposed rule. This proposal seeks public comment in accordance with section 307(d) of the CAA and should not be used or cited in any litigation as a final position of the Agency.","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/2006/09/14/E6-15248.html","cfr_references":[{"chapter":null,"citation_url":null,"part":51,"title":40},{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"71 FR 54235","comment_url":null,"comments_close_on":"2006-10-16","correction_of":null,"corrections":[],"dates":"Comments. Comments must be received on or before November 13, 2006. Under the Paperwork Reduction Act, comments on the information collection provisions must be received by OMB on or before October 16, 2006.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2003-0064","FRL-8219-6"],"dockets":[],"document_number":"E6-15248","effective_on":null,"end_page":54252,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2006/09/14/E6-15248.xml","html_url":"https://www.federalregister.gov/documents/2006/09/14/E6-15248/prevention-of-significant-deterioration-psd-and-nonattainment-new-source-review-nsr-debottlenecking","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E6-15248?publication_date=2006-09-14","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2006-09-14/E6-15248/mods.xml","not_received_for_publication":null,"page_length":18,"page_views":{"count":1868,"last_updated":"2026-09-20 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2006-09-14/pdf/E6-15248.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2006-09-14","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2006/09/14/E6-15248.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":"2011-11-12T20:01:00Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":54235,"subtype":null,"title":"Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Debottlenecking, Aggregation, and Project Netting","toc_doc":"Prevention of significant deterioration and nonattainment new source review; debottlenecking, aggregation, and project netting","toc_subject":"Air quality implementation plans:","topics":["Administrative practice and procedure","Air pollution control","Environmental protection","Intergovernmental relations","Reporting and recordkeeping requirements"],"type":"Proposed Rule","volume":71}