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Be aware that some companies are advertising and attempting to
sell devices that cannot be used to comply with Air Resources
Board (ARB) diesel engine regulations.  Only diesel particulate
matter (PM) filters or other devices that have been verified by
the ARB to meet rigorous emission reduction and durability
demonstration requirements can be used to comply.  Diesel PM
filters that have been verified by the ARB are listed at
http://www.arb.ca.gov/diesel/verdev/vt/cvt.htm.  Be sure to check
that any device you are considering is on this list.  You may
also choose to contact an authorized installer to learn more
about verified PM filter retrofit options at:
http://www.arb.ca.gov/msprog/decsinstall/decsinstall.htm. 
 
In addition, diesel engines that operate on biodiesel or have
been modified to operate in combination with diesel fuel and
alternative fuels must still meet the same emission reduction
requirements as other diesel engines and are not exempt from the
regulations.

For additional information about in-use diesel engine
requirements, please visit the Truck Stop at:
http://www.arb.ca.gov/truckstop, call 866-6DIESEL (866-634-3735)
or email us at: 8666diesel@arb.ca.gov

Background:

The Air Resources Board has adopted a number of regulations that
require diesel engine owners to reduce toxic air pollution
emissions.  These regulations are part of the State’s plan to
meet federal ambient air quality standards and to protect public
health.  Between 2012 and 2023, nearly all trucks and buses that
operate in California with a manufacturer’s gross vehicle weight
rating greater than 14,000 pounds will need to upgrade to reduce
exhaust emissions.  Similar clean-up requirements are already in
effect for operators of vehicles in drayage operations (ports and
rail) and transport refrigeration units (reefers),  Additionally,
comparable requirements for owners of certain off-road equipment,
including equipment used in construction, industrial, and airport
operations, will take effect soon.  To comply with these
requirements, fleet owners may retrofit existing engines by
installing ARB verified diesel PM filters or by upgrading to
newer cleaner engines.


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