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EPA/AR

RIN: 2060-AS43

Publication ID: Fall 2015

Title: Stationary Compression Ignition Engine NSPS Amendments
Abstract: New stationary and nonroad compression ignition (CI) internal combustion engines are equipped by the engine manufacturer with emission controls to meet the Tier 4 final emission standards, which generally begin with either the 2014 or 2015 model year. Many Tier 4 final engines are equipped with selective catalytic reduction (SCR) to reduce NOx. To ensure the engine does not operate if the SCR is not working, SCR-equipped engines include design features called "inducements" that limit the engine power and eventually shut down the engine if the SCR is operated without urea, or the electronic control module cannot confirm that the SCR system is operating properly. Engine operators raised concerns regarding engines shutting down during emergencies because the inducement is triggered, for example, if the owner/operator is unable to obtain urea in the immediate aftermath of a hurricane. To address the issue for nonroad engines, EPA recently finalized amendments to the standards for new nonroad CI engines that allow the operator to override the inducements and thus avoid engine shutdown during a qualified emergency situation, which is defined as one in which allowing the inducement to shut down the engine "poses a significant direct or indirect risk to human life." This action proposes similar amendments to the standards for stationary engines. This action also proposed to align the definition of remote areas of Alaska with the definition used in the National Emission Standard for Hazardous Air Pollutants (NESHAP) for stationary reciprocating internal combustion engines.
Agency: Environmental Protection Agency(EPA)	Priority: Substantive, Nonsignificant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Proposed Rule Stage
Major: No	Unfunded Mandates: No
CFR Citation: 40 CFR 60
Legal Authority: 42 U.S.C. 7411

Legal Deadline:

Action	Source	Description	Date
None

Timetable:

Action	Date	FR Cite
NPRM	11/06/2015	80 FR 68808
NPRM Comment Period End	12/21/2015
Final Rule	08/00/2016

Regulatory Flexibility Analysis Required: No	Government Levels Affected: Federal, State
Small Entities Affected: No	Federalism: No
Included in the Regulatory Plan: No
RIN Data Printed in the FR: No
Agency Contact: Melanie King Environmental Protection Agency Air and Radiation 109 T.W. Alexander Drive, Mail Code D243-01, Research Triangle Park, NC 27711 Phone:919 541-2469 Email: king.melanie@epa.gov Nick Hutson Environmental Protection Agency Air and Radiation 109 T.W. Alexander Drive, Mail Code D243-01, Research Triangle Park, NC 27711 Phone:919 541-2968 Fax:919 541-4991 Email: hutson.nick@epa.gov