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EPA/AR RIN: 2060-AR46 Publication ID: Fall 2014 
Title: Heavy-Duty Highway Program: Revisions for Emergency Vehicles and SCR Maintenance 
Abstract: EPA has adopted minimum maintenance intervals for replenishment of consumable chemical reductant (commonly known as diesel exhaust fluid, or DEF) in connection with the use of selective catalytic reduction (SCR) technologies. Second, EPA adopted provisions allowing manufacturers of nonroad engines to give operators the means to obtain short-term relief from emission controls while operating in emergency situations, such as those where operation of a nonroad engine or equipment is needed to protect human life, and where obtaining short-term relief from emission controls enables such operation. In this action EPA also adopted minor revisions to the final rule for emergency vehicles that became effective August 7, 2012. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 86    40 CFR 1066   
Legal Authority: Clean Air Act   
Legal Deadline:
Action Source Description Date
None       
Timetable:
Action Date FR Cite
NPRM  06/08/2012  77 FR 34149   
Final Rule  08/08/2014  79 FR 46356   
Final Rule Effective  09/08/2014 
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