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onrdiesel -- Truck and Bus Regulation Updated Fact Sheet and Advisory about Enforcement Delay and Reporting Date Changes

Posted: 11 Jan 2011 15:34:28
The California Air Resources Board (ARB or Board) staff has
posted Enforcement Advisory 424 and a fact sheet.   Enforcement
Advisory No. 424 provides information about the enforcement delay
of the Truck and Bus Regulation until January 1, 2012.  Staff has
also posted a factsheet summarizing the compliance requirements
consistent with the proposed amendments considered by the Board
on December 17, 2010.  The Advisory and the factsheet are
available at: http://www.arb.ca.gov/dieseltruck.

Background

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 Stateís 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 that
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.

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