Update on Off-Road Equipment and On-Road Truck Regulations

In December 2010 the California Air Resources Board (CARB) approved modifications to the Off-Road Equipment and On-Road Truck & Bus Regulations.  The changes to the two rules provide a measure of relief by delaying the dates fleets must begin to upgrade or replace equipment and trucks.  The updated regulatory language approved in December is still pending and is expected to be released for review and a 15-day comment period with the next two weeks.  The Construction Industry Air Quality Coalition (CIAQC) will provide more on the two regulations including the Low-Mileage Exemption for construction trucks when they become available.  So stay tuned! 

In the mean time, CARB has recently released information about the Off-Road Equipment and Truck & Bus Regulations that contractors should be aware of.  Please take a moment to review CARB's messages below and note the links for Enforcement Advisory 424 and a compliance tool for the Truck & Bus Regulation.

Off-Road Regulation

----- Original Message -----
From: Doll, Jeff@ARB
To: Doll, Jeff@ARB
Sent: Thursday, March 03, 2011 3:07 PM
Subject: 2011 Off-Road Regulation Large Fleet Reporting and Compliance Certification

Dear Registered DOORS Fleet Contact:

This note is to inform fleets that ARB will not be enforcing the off-road regulation large fleet reporting and compliance certification deadline this year.  The first large fleet annual reporting date and due date for a signed statement affirming compliance will instead be March 1, 2012.  Section 2449(g)(2) of the off-road regulation that is currently in effect includes a requirement for large fleets to update their DOORS data and submit a compliance certification signed by a responsible official (now called a Responsible Official Affirmation of Reporting) by April 1, 2011, but the December 2010 amendments modified this requirement.

However, we do encourage you to double check that your DOORS data is accurate.  We also remind fleets that the requirements to report added vehicles within 30 days to ARB, and to label vehicles with red and white Equipment Identification Numbers (EINs) remain in effect and are being enforced.  Additionally, we thank those fleets who have already submitted their annual reporting and compliance certification for this year.  Your diligence in submitting it is greatly appreciated.

If you have any questions regarding off-road reporting, please contact the DOORS hotline at (877) 59-DOORS [(877) 593-6677] or by email at doors@arb.ca.gov.  For general questions about diesel regulations, contact the Diesel hotline at (866) 6-DIESEL [(866) 634-3735].

Jeffrey Doll
Air Resources Engineer
Off-Road Implementation Section
Mobile Source Control Division
California Air Resources Board
1001 "I" Street
P.O. Box 2815
Sacramento, California 95812
Work: (916) 445-0281
Fax: (916) 323-5526
E-mail: jdoll@arb.ca.gov

On-Road Truck & Bus Regulation

CARB Message:


On December 11, 2008, the Board approved for adoption the Truck and Bus regulation to control emissions from nearly all existing diesel powered heavy-duty trucks and buses operating in California.  The regulation became effective under California law on January 8, 2010. The regulation applies to diesel fueled trucks and buses with a gross vehicle weight rating (GVWR) greater than 14,000 pounds that are privately owned, federally owned, and to publicly and privately owned school buses.  Local and state government owned diesel fueled trucks and buses are already subject to other ARB regulations. Reducing emissions from in-use trucks and buses is necessary to meet federally imposed clean air standards and to reduce the adverse health effects from truck and bus pollution.

In an update to the Board on December 9, 2009, a staff analysis showed that because of the global recession emissions from trucks and busses covered by the regulation were lower than originally anticipated. The Board directed staff to propose amendments to the Truck and Bus Regulation that would provide additional flexibility for fleets without impairing the State’s ability to meet federal air quality standards.  On December 17, 2010, the staff recommended amendments that would delay the initial requirement to install particulate matter (PM) retrofit filters by one year to January 1, 2012 and extended the time those vehicles would comply with PM filters installed.  The amendments would also defer engine replacements for two years until January 1, 2015.  Prior to 2020, replacements would be limited to 20 year old or older trucks that are not equipped with PM filters.  By January 1, 2023, most vehicles would still need to have 2010 model year engines or equivalent.

Enforcement Advisory 424 was issued to reflect the Boards direction; inclusion in this advisory was the extension of the agricultural vehicle provision reporting deadline, allowing fleets who did not report in 2010 to report by March 31, 2011 to participate in this provision.  To review this advisory, go to http://www.arb.ca.gov/enf/advs/advs424.pdf

Fleet Calculator Tool - Truck & Bus Regulation

CARB Message:

The California Air Resources Board (ARB or Board) staff has posted the fleet calculator to assist fleet owners in evaluating various compliance strategies to comply with the Truck and Bus Rule.

The compliance tool is an Excel spreadsheet that allows the user to input the engine model year, and emission control technology assumptions to determine what compliance options may be available to comply with the regulation for each calendar year.  Fleets can view automated compliance strategies for meeting the compliance schedule based on engine model year or can evaluate more flexible compliance strategies including the phase-in option, compliance credits, and special provisions.  The tool is consistent with amendments considered by the Board in December 2010 and is available at:


For factsheets, training dates, and other information about the regulation please visit at: www.arb.ca.gov/dieseltruck . If you have any questions, please call 866-6DIESEL (866-634-3735) or email at: 8666diesel@arb.ca.gov

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