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To address stakeholder requests, ARB staff is postponing
consideration of regulatory amendments until November and will be
scheduling additional workshops in August/September to discuss
the emissions inventory and proposed amendments.  

Staff held workshops in June and July regarding proposed
amendments to the Truck and Bus, Off-Road, Tractor-Trailer GHG,
and Drayage Truck regulations.  At the workshops, stakeholders
requested additional time to review and comment on the following:

• Details of planned emissions inventory updates for trucks and
off-road vehicles,
• Specific draft regulatory language, 
• ARB’s revised report on fine particulate matter (PM2.5)
mortality estimates, a draft of which will be released later this
summer, and
• Proposed changes to the Drayage Truck Regulation. 

To address stakeholders’ requests, the Board Hearing to consider
the proposed amendments, currently slated for September 2010,
will be moved to November.  In the interim, staff will hold
workshops in August and September to discuss the revised emission
inventory and the proposed amendments. This delay in the hearing
date will provide sufficient time to hold the workshops and to
make any necessary adjustments after the workshops.  A workshop
notice will be forthcoming.  

Background

The Truck and Bus, Off-Road, and Drayage Truck Regulations are
intended to reduce toxic and smog-forming emissions from trucks,
buses, and off-road vehicles. Reducing such emissions is
necessary to meet federally imposed clean air standards and to
reduce the adverse health effects from air pollution throughout
the state. The Tractor-Trailer GHG regulation is intended to
reduce greenhouse gas emissions from tractor-trailers traveling
California’s roadways.  

While staff is proposing to amend several elements of the truck
and bus and off-road regulations, many provisions are in effect
and not being considered for amendment.  These include:

• Off-road reporting and labeling requirements;
• Off-road idling limits and sales disclosure requirements; and
• Requirements to report vehicles utilizing the agricultural
vehicle provisions and some two engine street sweepers under the
truck and bus regulation. 

However, due to the pending amendments to the truck and bus and
off-road regulations, several requirements have been postponed: 
• On February 11, 2010, ARB issued a delay of the off-road
regulation's retrofit and turnover requirements pending further
notice.
• The truck and bus regulation reporting originally required by
March 31, 2010, has been delayed until early 2011.  The truck and
bus retrofit and turnover requirements (scheduled to begin
January 1, 2011) will also be extended.   

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).  You may also visit
the ARB’s truck stop website at:
http://www.arb.ca.gov/msprog/truckstop/truckstop.htm to learn
more regarding ARB’s programs for trucks, buses, and trailers. 
For further information about the off-road diesel vehicle
regulation, please visit the off-road regulation website
at:http://www.arb.ca.gov/msprog/ordiesel/ordiesel.htm


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