{"abstract":"This proposal consists of three parts. First, EPA is proposing revisions to its heavy-duty diesel regulations that would enable emergency vehicles, such as dedicated ambulances and fire trucks, to perform their mission-critical life-saving work without risking that abnormal conditions of the emission control system could lead to decreased engine power, speed or torque. The revisions would allow manufacturers to request and EPA to approve modifications to emission control systems on emergency vehicles so they do not interfere with the vehicles' missions. Second, EPA is proposing to revise the emission-related maintenance and scheduled maintenance intervals for all motor vehicles and nonroad compression-ignition engines to specify minimum maintenance intervals for replenishment of consumable chemical reductant in connection with the use of selective catalytic reduction technologies. Third, EPA is proposing to offer short-term relief for nonroad engines from performance inducements related to the emission control system, for general purpose nonroad vehicles while operating in temporary emergency service. These actions are not expected to result in any significant changes in regulatory burdens or costs.","action":"Notice of proposed rulemaking.","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/2012/06/08/2012-13087.html","cfr_references":[{"chapter":null,"citation_url":null,"part":85,"title":40},{"chapter":null,"citation_url":null,"part":86,"title":40},{"chapter":null,"citation_url":null,"part":1039,"title":40}],"citation":"77 FR 34149","comment_url":null,"comments_close_on":"2012-07-27","correction_of":null,"corrections":[],"dates":"Comments on all aspects of this proposal must be received on or before July 27, 2012. See the SUPPLEMENTARY INFORMATION section on \"Public Participation\" for more information about written comments.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2011-1032","FRL-9673-2"],"dockets":[],"document_number":"2012-13087","effective_on":null,"end_page":34178,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/06/08/2012-13087.xml","html_url":"https://www.federalregister.gov/documents/2012/06/08/2012-13087/heavy-duty-highway-program-revisions-for-emergency-vehicles-and-scr-maintenance","images":{"EP08JN12.001":{"large":"https://img.federalregister.gov/EP08JN12.001/EP08JN12.001_large.png","medium":"https://img.federalregister.gov/EP08JN12.001/EP08JN12.001_medium.png","original_size":"https://img.federalregister.gov/EP08JN12.001/EP08JN12.001_original_size.png"}},"images_metadata":{"EP08JN12.001":{"large":{"identifier":"EP08JN12.001","content_type":"image/png","size":51075,"width":823,"sha":"164fb8e1b515251c4d0ea0e16486f252","url":"https://img.federalregister.gov/EP08JN12.001/EP08JN12.001_large.png","height":619},"medium":{"identifier":"EP08JN12.001","content_type":"image/png","size":15310,"width":457,"sha":"e75d83451eb72f7869ee0c7e52254d1a","url":"https://img.federalregister.gov/EP08JN12.001/EP08JN12.001_medium.png","height":344},"original_size":{"identifier":"EP08JN12.001","content_type":"image/png","size":99541,"width":1730,"sha":"8f27e7dbd833079f9d726a9cade9002a","url":"https://img.federalregister.gov/EP08JN12.001/EP08JN12.001_original_size.png","height":1301}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-13087?publication_date=2012-06-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-06-08/2012-13087/mods.xml","not_received_for_publication":null,"page_length":30,"page_views":{"count":745,"last_updated":"2026-08-25 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-06-08/pdf/2012-13087.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-13087.pdf?1339073415","publication_date":"2012-06-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/06/08/2012-13087.txt","regulation_id_number_info":{"2060-AR46":{"issue":"201404","html_url":"https://www.federalregister.gov/regulations/2060-AR46/heavy-duty-highway-program-revisions-for-emergency-vehicles-and-scr-maintenance","title":"Heavy-Duty Highway Program: Revisions for Emergency Vehicles and SCR Maintenance","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201404&RIN=2060-AR46&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2060-AR46"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Email from VW to USEPA","document_id":"EPA-HQ-OAR-2011-1032-0065"},{"title":"Matt Spears Memorandum re External Meetings 07 30 2014","document_id":"EPA-HQ-OAR-2011-1032-0064"},{"title":"Docket Memo from William Charmley","document_id":"EPA-HQ-OAR-2011-1032-0063"},{"title":"Summary and Analysis of Comments [EPA-420-R-14-001]","document_id":"EPA-HQ-OAR-2011-1032-0062"},{"title":"Integer Monitor Issue 21 April 2013","document_id":"EPA-HQ-OAR-2011-1032-0061"},{"title":"Integer information on DEF","document_id":"EPA-HQ-OAR-2011-1032-0060"},{"title":"Emergency vehicle discussion with GSA","document_id":"EPA-HQ-OAR-2011-1032-0059"},{"title":"Email on Revised Definitions of Emergency Vehicle and Emergency Equipment","document_id":"EPA-HQ-OAR-2011-1032-0058"},{"title":"Email on Cummins-powered airport emergency vehicles","document_id":"EPA-HQ-OAR-2011-1032-0057"},{"title":"Email from Forest Service on Fire Dozers","document_id":"EPA-HQ-OAR-2011-1032-0056"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2011-1032","supporting_documents_count":44,"docket_id":"EPA-HQ-OAR-2011-1032","regulation_id_number":"2060-AR54","title":"Heavy-Duty Highway Program: Revisions for Emergency Vehicles and SCR Maintenance","checked_regulationsdotgov_at":"2012-07-13T05:01:32Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":34149,"subtype":null,"title":"Heavy-Duty Highway Program: Revisions for Emergency Vehicles and SCR Maintenance","toc_doc":"Revisions for Emergency Vehicles and SCR Maintenance","toc_subject":"Heavy-Duty Highway Program:","topics":["Administrative practice and procedure","Air pollution control","Confidential business information","Environmental protection","Imports","Labeling","Motor vehicle pollution","Penalties","Reporting and recordkeeping requirements","Research","Warranties"],"type":"Proposed Rule","volume":77}