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arbcombo -- Compliance When PM Filters are Required to be Removed or Sales/Installations are Suspended

Posted: 30 Sep 2011 14:21:42
The California Air Resources Board (ARB or Board) staff has
issued a Mail-Out to address compliance with existing in-use
regulations, including early action credit eligibility, when a
manufacturer of a verified diesel PM filter suspends sales and
installations of a PM filter, or requires its removal for a
particular engine family.
This advisory only applies to vehicles subject to the following

• Truck and Bus Regulation
• Transit Fleet Vehicle Regulation
• Urban Bus Regulation
• Public Agency and Utility Fleet Regulation
• Solid Waste Collection Vehicle Regulation
• In-Use Off-Road Vehicle Regulation

ARB is providing time for fleets affected by this to purchase and
install other verified PM filters, or to allow for completion of
approved modifications for PM filters that are removed by the
manufacturer, without affecting fleet compliance or the ability
of fleets to earn or retain early compliance credits.  Under this
advisory, if a PM filter manufacturer requires a verified PM
filter to be removed from a particular engine family, the fleet
owner will have 90 days or until January 31, 2012, whichever is
longer, to take appropriate action.  During this period, the
fleet owner will be permitted to operate any affected vehicles in
their original equipment manufacturer configuration without a PM
filter.  The fleet owner must keep records of the change as
specified in the applicable regulation.  The Mail-Out #11-29 is
available at: 

For other information about diesel vehicle in-use regulations,
please visit Truck Stop: http://www.arb.ca.gov/truckstop .
If you have any additional questions, please call 866-6DIESEL
(866-634-3735) or email at: 8666diesel@arb.ca.gov


The Air Resources Board has adopted a number of regulations that
require diesel engine owners to take steps to reduce their engine
emissions.  Nearly all trucks and buses with a manufacturer’s
gross vehicle weight rating greater than 14,000 pounds that
operate in California are required to be upgraded to reduce
exhaust emissions between now and 2023.  Similar requirements
will also become effective in the next several years effecting
owners and operators of certain off-road equipment (including
equipment used in construction, industrial, and airport
operations).  To comply with these requirements, fleet owners can
upgrade exiting engines by installing PM filter retrofits or
other Verified Diesel Emission Control Strategies (VDECS), or by
upgrading to cleaner engines.  These regulations are part of the
State’s plan to meet federal ambient air quality standards and to
protect public health.  

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