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EPA/AR RIN: 2060-AR46 Publication ID: Spring 2013 
Title: Heavy-Duty Highway Program: Revisions for Emergency Vehicles and SCR Maintenance 
Abstract: On January 18, 2001, EPA published a rule promulgating more stringent NOx and PM standards for heavy-duty highway engines ("the heavy-duty highway rule"), entitled "Control of Air Pollution from New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards" (66 FR 5001). EPA has previously published clarifications and technical amendments to that final heavy-duty highway rule. This action would provide additional clarification, modifications and technical amendments to the regulations for heavy-duty highway engines and would clarify, modify, and technically amend some provisions in 40 CFR parts 86 and 1068. This action would assist regulated parties to comply with requirements by clarifying and/or simplifying those requirements. Specifically, this action would provide flexibility for on-highway emergency response vehicles with respect to emissions of particulate matter and oxides of nitrogen. This action would also amend the requirements for emission-related scheduled maintenance with respect to replacement of diesel exhaust fluid, which is used in selective catalytic reduction control systems. This action is not expected to result in significant changes in regulatory burdens or costs. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: Undetermined 
CFR Citation: 40 CFR 86 and 1068   
Legal Authority: Clean Air Act   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  06/08/2012  77 FR 34149   
Final Rule  10/00/2013 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL: http://www.epa.gov/otaq/highway-diesel/regs/2007-heavy-duty-highway.htm  
RIN Data Printed in the FR: No 
Agency Contact:
Matt Spears
Environmental Protection Agency
Air and Radiation
Mail Code: ASD1,
Ann Arbor, MI 48105
Phone:734 214-4921
Fax:734 214-4816
Email: spears.mattew@epa.gov

Lauren Steele
Environmental Protection Agency
Air and Radiation
Ann Arbor, MI 48105
Phone:734 214-4788
Email: steele.lauren@epa.gov