5 April 2002

The California Air Resources Board (ARB) has published the final proposed “Diesel Emission Control Strategy Verification Procedure, Warranty and In-Use Compliance Requirements” for on-road, off-road, and stationary diesel-fueled vehicles and equipment. The document is scheduled for adoption at the ARB public hearing on 16 May 2002.

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Equipment verification according to the proposed procedure will be required for all emission control systems to be used in the coming diesel retrofit programs in California. In 1998 the ARB identified diesel particulate matter as a toxic air contaminant. The ARB adopted a Diesel Risk Reduction Plan which established goals of reducing emissions in virtually all in-use diesel engines in California by 2010. An important component in achieving this objective will be retrofitting existing diesel engines with diesel particulate filters or other devices to reduce particulate emissions. The verification protocol and warranty requirements have been developed to ensure that retrofit emission controls provide real and durable emission reductions.

The ARB will consider public comments on this proposal, which may be presented orally, during the ARB public hearing on May 16 in Sacramento, CA, or submitted in writing. Written comments must be submitted by 15 May 2002.

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Source: California ARB