Alternative Diesel Fuels

This page last reviewed on October 17, 2014

Background 

ADFPicARB's diesel fuel regulations are geared toward controlling criteria pollutant emissions from hydrocarbon-based fuels and are not intended to provide a market pathway for alternative diesel fuels (ADF), such as biodiesel.  With the advent of the policies that incent or require ADFs, such as the federal Renewable Fuel Standard and the California Low Carbon Fuel Standard, there is a clear need to provide a pathway for emerging ADFs to enter the California market.  Over the past several years, ARB staff has endeavored to solicit stakeholder input via meetings and public workshops regarding the need for new regulations to address this gap. Information regarding delveloping ADF regulatory concepts and process can be accessed from the ADF websites.

Under the proposed ADF regulation, biodiesel is considered the first alternative diesel fuel. Staff has conducted essential research and held many workshops for biodiesel as an ADF.

What's New

  • October 20, 2014: Public meeting in Sacramento from 1:00 p.m. to 4:00 p.m. to discuss the Alternative Diesel Fuels (ADF) regulation.   For more information...
  • July 29, 2014: Solicitation of Alternatives for Analysis in the Alternative Diesel Fuel Standardized Regulatory Impact Assessment (SRIA). For more information... 
  • July 1, 2014:  Webinar from 10:30 a.m. to 12:30 p.m. PST to discuss ARB's ongoing assessment of the air quality impacts from biodiesel use.  For more information...
  • April 17, 2014:  Public meeting in Sacramento from 9:00 a.m. to 12:00 p.m. to discuss the Alternative Diesel Fuels (ADF) regulation.  For more information...
  • Notice of Decision Not to Proceed - March 14, 2014  Please be advised that Air Resources Board (ARB/Board) has posted a Notice of Decision Not to Proceed (NDNP) to withdraw the rulemaking to consider a proposed new regulation on the Commercialization of New Alternative Diesel Fuels. Along with ARB’s action to issue the NDNP, the rulemaking item will also be removed from the March Board hearing calendar.
  • February 13, 2014:  Public meeting in Sacramento from 9:00 a.m. to 12:00 p.m. to discuss the Alternative Diesel Fuels (ADF) regulation.  For more information...
  • Notice of Postponement - March 20, 2014  The Board hearing scheduled for December 12-13, 2013, to consider a proposed regulation governing the commercialization of motor vehicle ADF, has been delayed to March 20, 2014.  This notice and the associated regulatory materials can be accessed from ARB's ADF Rulemaking Activity website.
  • Public Hearing Notice - December 12-13, 2013  The Board will conduct a public hearing on December 12-13, 2013, to consider a proposed regulation governing the commercialization of motor vehicle ADF.  This notice and the associated regulatory materials can be accessed from ARB's ADF Rulemaking Activity website..

    Public Meetings

    October 20, 2014Public meeting in Sacramento from 1:00 p.m. to 4:00 p.m. to discuss the Alternative Diesel Fuels (ADF) regulation. 

    July 1, 2014Webinar from 10:30 a.m. to 12:30 p.m. PST to discuss ARB's recently completed biodiesel emissions characterization study, the resulting new data, and the preliminary analysis  including this additional data. 

    April 17, 2014Public meeting in Sacramento from 9:00 a.m. to 12:00 p.m. to discuss the Alternative Diesel Fuels (ADF) regulation. 

    February 13, 2014Public meeting in Sacramento from 9:00 a.m. to 12:00 p.m. to discuss the Alternative Diesel Fuels (ADF) regulation. 

    September 5, 2013 Public meeting in Sacramento from 9:00 a.m. to 12:00 p.m. to discuss draft regulatory language for the upcoming ADF rulemaking. 

    June 13, 2013 Public meeting in Sacramento from 10:00 a.m. to 2:00 p.m. to discuss the continued development of regulatory concepts for establishing fuel requirements for alternative diesel fuels (ADF), including inlcuding new concepts resulting from the discussion at the previous workshop held on April 23, 2013. 

    • Meeting Notice and Agenda (PDF 1.7MB)
    • Preliminary Draft Regulation Order (PDF 26KB)
    • Draft Proposed Amendments to the California Diesel Fuel Regulations (351 KB)
    • ARB Staff Presentation on ADF (784 KB)
    • ARB Staff Presentation on Draft of Proposed Diesel Amendments (345 KB)
    April 23, 2013 Public meeting in Sacramento from 10:00 a.m. to 4:00 p.m. to discuss regulatory concepts for establishing fuel requirements for alternative diesel fuels (ADF), including biodiesel, renewable diesel and other emerging diesel fuel substitutes.  During this meeting, we will discuss our biodiesel literature search, completed and on going emissions research studies, as well as preliminary regulatory concepts.

    February 15, 2013

    Discussion of Conceptual Approach to Regulation of Alternative Diesel Fuels (PDF - 658 KB)

    ARB staff has posted a white paper which describes staff’s regulatory concepts for an Alternative Diesel Fuel (ADF) regulation.  Staff proposes an updated regulatory framework and addresses requirements for biodiesel and renewable diesel.  This white paper represents the culmination of staff’s evaluations and information gathered in public workshops over the past several years.  Public comments will be accepted as part of an upcoming public workshop, which staff will announce soon via a separate listserve email.

    Documents

    • Discussion of Conceptual Approach to Regulation of Alternative Diesel Fuels, February 2013 (PDF - 658 KB) 
    • Cal EPA Fuels Guidance Document, November 2011 (PDF - 468 KB)
    • Biodiesel Guidance Document, October 2011 (PDF - 314 KB)

    Related Links

    LCFSCalifornia Air Resources Board

    Low Carbon Fuel Standard
    Fuels Multimedia Evaluations
    DataCenterU.S. Department of Energy
      
    Alternative Fuels Data Center
    Provides information on alternative fuels and vehicles including programs, events, tools, data, analysis and trends
    RFSU.S. Environmental Protection Agency

      Renewable Fuel Standard
    BFINU.S. Department of Energy

    Bioenergy Feedstock Information Network
    Biomass feedstock information resources from the  U.S. Department of Engergy and other  research organizations.
    USDA
    DODU.S. Department of Defense

     Operational Energy Plans
    DoD's energy policy interest in biofuels and alternative fuels as “sustainable and reliable” ways the United States can accomplish the defense mission.

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