California Air Resources Board Offering Compliance Training Courses

The California Air Resources Board recently announced that it will be conducting compliance training for the off-road equipment and large spark-ignited fleet regulations. This information is posted below. It includes course dates in March and April and the locations throughout California.

CIAQC must note that class attendees should be aware that CARB can and has used the information provided in course registrations and sign-in sheets to support their enforcement actions for regulation violations. If this is a concern to anyone that wants to attend a training course, CIAQC recommends registering and signing in without disclosing your company name or information. There are no requirements that actual names must be used to attend a training course.

The California Air Resources Board is now offering new dates for Course 504: In-Use Off-Road Diesel Vehicle Regulation Training and for Course 505: Large Spark-Ignition (LSI) Fleet Regulation Training.

Course 504 provides an overview of the Off-Road regulation, including applicability, requirements currently in effect, future compliance requirements, and an overview of the Diesel Off-Road Online Reporting System (DOORS). Course 505 provides an overview of the LSI Fleet Regulation, including applicability, requirements currently in effect, compliance extensions, and enforcement activities. ARB staff will also be available after the classes to answer individual questions. There is no charge for these courses.

Dates and locations for Courses 504 and 505:

  • March 5, West Sacramento, CA
  • March 20, Selma, CA
  • March 21, Bakersfield, CA
  • March 28, Victorville, CA
  • April 3, Santa Rosa, CA
  • April 17, Riverside, CA
  • April 18, Alhambra, CA

Course 504 will be given in the morning and Course 505 will be given in the afternoon on each of the dates listed above. However, you must register for each course separately. For more information about these classes (including times and locations) and to register online, please visit the following websites:

Course 504:

Course 505:


ARB’s regulation for In-Use Off-Road Diesel Vehicles (Off-Road regulation) became effective under California law on June 15, 2008. This regulation is intended to reduce harmful emissions from diesel powered construction and mining vehicles operating in California. Fleets were required to initially report their off-road diesel vehicles to ARB in 2009 via the Diesel Off-road On-line Reporting System (DOORS). In addition, fleet owners are subject to restrictions on unnecessary idling and will be subject to accelerated replacement requirements. In December 2011, major amendments to the Off-Road regulation, which include delaying the first compliance date to no earlier than January 1, 2014, became effective.

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 For further information about the Off-Road regulation, please visit the Off-Road regulation website

On May 25, 2006, ARB adopted the In-Use Off-Road Large Spark-Ignition Engine Fleet Regulation (LSI Fleet Regulation or Regulation). The LSI Fleet Regulation establishes fleet average emission level standards for operators of in-use fleets of forklifts, industrial tow tractors, industrial sweeper/scrubbers, and pieces of airport ground support equipment (GSE) powered by LSI engines. The Regulation also establishes recordkeeping requirements.

If you have any questions regarding the requirements of the LSI Fleet Regulation, please call the LSI Fleet Regulation information line toll-free at (800) 387-2992 or

For further information on ARB’s diesel vehicle and equipment regulations, please call the California Air Resources Board Diesel Hotline at 866-6DIESEL (866-634-3735).

Site design by Chris Kennedy. Content copyright Construction Industry Air Quality Coalition.

Please review our privacy policy and terms of use.

Supported by the Southern California Industry Advancement Funds and other organizations throughout the state.