Diesel Retrofit & Replacement Guidance

EPA’s Diesel Retrofit and Replacement guidance has been updated and posted online.  This document provides guidance on quantifying and using emission reductions from highway and non-road diesel vehicles, engines, and equipment that have been retrofitted.  The guidance discusses how emission reductions from diesel retrofit projects can be used in a SIP, as well as transportation conformity and general conformity determinations, based on the MOVES2014a methodology described in this guidance.

There is also a spreadsheet-based tool that simplifies the creation of a nonroad retrofit input table by creating a template for that table, then filling that table based on user input. Instructions are included with the tool.


Executive Director’s Recommended DFW 2008 Eight-Hour Ozone Standard Nonattainment Area RACT Update SIP Revision

On April 4, 2018, the commission will consider approval of the Executive Director’s recommended revision to the State Implementation Plan (SIP) for the DFW nonattainment area for the 2008 eight-hour ozone standard and a voluntary Agreed Order with TXI Operations, LP. The proposed Dallas-Fort Worth (DFW) 2008 Eight-Hour Ozone Standard Nonattainment Area Reasonably Available Control Technology (RACT) Update SIP revision (Non-Rule Project No. 2017-001-SIP-NR) would address the United States Environmental Protection Agency’s final conditional approval of RACT for nitrogen oxides for the DFW 2008 eight-hour ozone standard nonattainment area through a voluntary Agreed Order No. 2017-1648-SIP (Non-Rule Project No. 2018-010-SIP-NR), with TXI Operations, LP.

For additional information, please visit the Dallas-Fort Worth: Ozone Latest Planning Activities webpage.

FHWA Air Quality and Sustainable Transport Highlights—January-February 2018 Issue

FHWA Air Quality and Sustainable Transport Highlights—January-February 2018 Issue (PDF)

Items of interest in this issue include:

  • FHWA Released Comprehensive Guide to Transportation Vulnerability Assessment and Adaptation
  • FHWA Added New Modules to Congestion Mitigation and Air Quality Improvement Program Emission Reductions Calculator
  • Court Decision on the Revocation of 1997 Ozone NAAQS: South Coast Air Quality Management District v. USEPA
  • Alternative Fuels Corridor Second Round Designations Update

Past issues of the Air Quality and Conformity Highlights are available at: http://www.fhwa.dot.gov/environment/air_quality/conformity/highlights/
Past issues of the Sustainable Transport Newsletter are available at: https://www.fhwa.dot.gov/environment/sustainability/newsletter/index.cfm