# Heavy
- Duty Engine and Vehicle, and Nonroad Technical Amendments



# Package EPA and NHTSA Briefing for OIRA 

# March 26, 2013

Draft & Deliberative 1

# Briefing Outline

• Background of the rule

• Timing of the rule

• Overview of the structure of the rule

• Elements of the rule

DRAFT & DELIBERATIVE 2

# Why are EPA and NHTSA taking this

joint action now?

• After publication of the heavy

- duty GHG and fuel efficiency rule in 2011, EPA and NHTSA began an extensive outreach effort to aid in the rule’s implementation.

– Held a series of certification workshops

– Posted Q&A documents on EPA’s Website

• In the course of these efforts, the agencies received a series of comments on specific aspects of the rules. In some cases, it became clear that minor changes to the rules would help to clarify the rule’s intent, make it more effective, and in some cases correct typographical errors.

• The heavy

- duty amendments contained in this rule are based on these implementation discussions.

• EPA is also making technical amendments to a few of the existing highway engine and nonroad mobile source regulations based on requests from the regulated industry to clarify intent and to streamline the implementation of these standards.

DRAFT & DELIBERATIVE 3

# Why is the timing for this rule important?

• EPA and NHTSA HD GHG and fuel efficiency amendments

– Manufacturers need these finalized in mid

- 2013 for MY13 reports and MY14 certification



### • EPA
- only amendments for nonroad & highway engine criteria pollutants

– Nonroad Diesel technical hardship approval amendments

- some equipment manufacturers need these to continue production in 2013

– Large gasoline engine fuel line permeation test procedure amendment: Compliant lines are not available

- manufacturers need this to continue production in 2013

– Amendments to existing replacement engine amendments

- diesel emission reduction act and similar state grant programs need this ASAP to resume suspended clean diesel engine replacement programs

– Small gasoline engine certification test fuel amendment

- manufactures need this in 2013 to prevent unnecessary certification testing burden

Draft & Deliberative 4

# Overview of this Rule’s Structure

• EPA and NHTSA Direct Final Rule (DFR)/Final Rule (FR)

– Jointly published by EPA and NHTSA

– Only for the Heavy

- duty GHG and fuel efficiency amendments

– Some amendments are EPA

- only, some NHTSA

- only, and some are joint

– Joint DFR/FR maintains a single national program and reinforces the agencies’ commitment to joint rulemaking

• EPA
- only portion of the DFR

– DFR also contains EPA

- only amendments related to highway and nonroad engine regulations

• EPA
- only Notice of Proposed Rulemaking (NPRM)

– EPA will also publish a parallel NPRM on all of EPA’s DFR contents

• In case of negative comment on any NHTSA portion of the DFR, NHTSA would publish a separate NPRM (& FRM)

• EPA and NHTSA would coordinate on any FRM to ensure that a single national program was maintained

Draft & Deliberative 5

# EPA’s Heavy

- Duty GHG Technical

Amendments

• A detailed list of EPA’s HD GHG technical amendments is 

## included in the preamble

– Several typographical fixes

– Certification and test procedure clarifications

– Corrections to make the regulations consistent with the intent expressed in the preamble



### – Adjust high roof sleeper cab aerodynamic bins to account for a test data error discovered after the FRM

• Error has resulted in an unintended significant increase in stringency of the standards

• Correcting this error makes the aero bin table’s stringency consistent with the stringency we used to determine the costs and benefits of the rule

Draft & Deliberative 6

# NHTSA HD Fuel Efficiency Tech

Amendments

• NHTSA has 14 technical amendments (6 joint with EPA/8 unique)

– Joint amendments provide clarifications and reduce 

## unnecessary burdens

– Unique amendments correct inadvertent misalignments with EPA, consistent with the preamble



## • Substance: streamline testing and reporting requirements, carryover missing EPA provisions on early MY compliance and credit holders, align certification options and family 

## classifications, fix rounding and typographical errors

Draft & Deliberative 7

# EPA
- only Replacement Engines

Revisions

• Engine manufacturers requested changes to address market needs and opportunities to reduce emissions with cleaner replacement engines.



### • On a limited basis, allow highway and nonroad equipment/vehicles to upgrade to cleaner new engines that are not Tier 4 or HD2010 compliant

– Recent regulation change was interpreted to allow an exemption only 

### when the old engine failed prematurely



### • Require using cleanest available replacement engines

• Allows for Diesel Emission Reduction Act and similar state clean 

### diesel re

- powering projects to resume

Draft & Deliberative 8

# EPA Nonroad Diesel Tier 4 Technical

Hardships

• As Tier 4 final standards implementation approaches, a few equipment manufacturers 

# have said the technical hardship provisions are too restrictive to meet their needs



# • EPA is amending the Transition Program for Equipment Manufacturers to address these concerns by allowing for additional hardship 

# allowances.

Draft & Deliberative 9

# Other EPA Nonroad Amendments

• Allow California gasoline test fuel for Federal nonroad small gasoline engine testing

• Revert to original Society of Automotive Engineers (SAE) fuel line permeation test procedures for nonroad large gasoline engines

– In 2004 SAE updated its fuel line permeation test procedures from 1996, which EPA regulations were updated to require

– Manufacturers are not selling fuel lines meeting the 2004 SAE requirement

– Reverting to 1996 procedures is consistent with rule’s intended stringency

Draft & Deliberative 10

# Next Steps

• The technical amendments are time sensitive for the regulated industries

• The agencies would like to complete interagency review as quickly as possible

DRAFT & DELIBERATIVE 11