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onrdiesel -- Overview of Truck and Bus Regulation Fact Sheet Posted

Posted: 06 May 2011 15:35:23
ARB staff have posted a fact sheet that provides an overview of
the Truck and Bus Regulation consistent with the amendments
approved by the Air Resources Board at its hearing on December
17, 2010.   The fact sheet is available at:
For more information on the Truck and Bus regulation, go to:
www.arb.ca.gov/dieseltruck or call 1-866-6DIESEL.


On December 11, 2008, the Air Resources Board (ARB or 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.

On December 17, 2010, the staff recommended amendments, which are
presently pending adoption, which would delay the initial
requirement to install particulate matter (PM) retrofit filters
by one year to January 1, 2012 and extend the time before a
vehicle equipped with a PM filter would have to have an engine
that meets 2010 model year emission standards. The amendments
would also defer engine replacements for vehicles without PM
filters 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 be equipped with an engine meeting
2010 model year emission standards.

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