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Contractors State License Board Urges Industry to Provide Input on Proposed Control Measures for Off-Road Mobile Diesel-Fueled Equipment

SACRAMENTO — The California Air Resources Board (ARB) is developing a control measure to reduce diesel emissions from off-road mobile equipment used in construction, mining, and industrial operations. The control measure is part of ARB's Diesel Risk Reduction Plan (Plan), which seeks to reduce public exposure to harmful diesel exhaust emissions 75% by 2010. As part of the Plan, control measures have already been developed for transit and school buses, stationary and portable engines, and solid waste collection trucks. Generally, the measures attempt to speed up equipment replacement with newer, cleaner burning engines or the addition of diesel particulate matter retrofit technology. More information about the control measure can be found at ARB's Web site:

As part of this measure, ARB is conducting a survey to better understand business practices pertaining to off-road diesel equipment. This includes equipment turnaround time, frequency of engine rebuilds, and leasing and idling practices. The information ARB gets from the survey will help in developing proposed regulatory concepts for the control measure. The Contractors State License Board (CSLB) encourages owners/operators of off-road mobile equipment to participate in this survey. It is available in hard copy by contacting Ms. Jackie Johnson at (916) 323-2750 or The CSLB also encourages owners/operators of mobile off-road diesel equipment to get involved in the process for this control measure. Your help is key to developing a control measure that is flexible, feasible, and reduces exposure to diesel emissions. You can also sign up on the ARB Web site to receive information on future meetings, workshops and other notices.


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