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EPA/OAR RIN: 2060-AV21 Publication ID: Spring 2022 
Title: Improvements for Heavy-Duty Engine and Vehicle Test Procedures--GEM Adjustments 
Abstract:

This rulemaking includes corrections, clarifications, additional flexibilities, and adjustment factors to improve the Greenhouse gas Emissions Model (GEM) compliance tool for heavy-duty vehicles while more closely matching the outputs produced by the original GEM version 3.0 that was used to establish the CO2 standards for Model Years 2021 and later in the 2016 Heavy-duty Phase 2 final rule. This notice supplements the proposed rule published on May 12, 2020 (85 FR 28153), which included a larger set of proposed revisions to modify and improve GEM. Most of the proposed revisions from that notice of proposed rulemaking are addressed in a final rulemaking published in the Federal Register, titled “Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and other Technical Amendments,” docket number EPA-HQ-OAR-2019-0307. Given the nature of this proposal, there will be neither significant environmental impacts nor significant economic impacts for any sector.

 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 86   
Legal Authority: 42 U.S.C. 7414 et seq. Clean Air Act   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  06/29/2021  86 FR 34189   
Final Rule  07/00/2022 
Additional Information: .
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Energy Effects: Statement of Energy Effects planned as required by Executive Order 13211.  Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Tuana Phillips
Environmental Protection Agency
Office of Air and Radiation
1200 Pennsylvania NW,
Washington, DC 20460
Phone:202 565-0074
Email: phillips.tuana@epa.gov

Amy Kopin
Environmental Protection Agency
Office of Air and Radiation
USEPA, 2565 Plymouth Road,
Ann Arbor, MI 48105
Phone:734 214-4173
Email: kopin.amy@epa.gov