Dear Sir/Madam:

The staff of the Air Resources Board (ARB) would like to invite you to a public workshop to discuss proposed amendments to the gasoline deposit control additive regulation (Title 13, California Code of Regulations, section 2257). This workshop is a follow-up to the first public workshop, held in Sacramento on March 24, that discussed the need for controlling combustion chamber deposits (CCDs ) and other possible changes to the regulation.

The workshop will be held at the following:

  June 11, 1998
1:30 p.m. to 4:30 p.m.
Secretary of State Office Building
1500 11th Street
Multipurpose Room #1.8.0 (Main Floor)
Sacramento, California

At the workshop, staff will discuss the proposed amendments and the basis for the modifications. An explanation of the proposed amendments and suggested regulatory language is enclosed for your information. In general, the proposed amendments will: 1) eliminate the certification requirement for port fuel injector clean-up, 2) lower the current intake valve deposit standard, and 3) incorporate a new combustion chamber deposit (CCD) standard. Other minor amendments are also proposed that affect the formulation of certification test fuels. An agenda is also enclosed for your information.

The ARB staff solicits comments on the proposed amendments. In particular, staff seeks comments on the maximum CCD weight "cap" limit for CCD performance and the need to better control certification test base fuel properties. This workshop is being conducted to provide a forum for discussion of the proposed amendments, and presentations by individual companies are encouraged. To be included on the agenda, or to discuss any other questions relating to the workshop, please contact Jim M. Aguila, Air Resources Engineer, at (916) 327-1512, or by e-mail at

The meeting facility is accessible to persons with disabilities. If accommodation is needed, please contact Ms. Jacqueline Wilson at (916) 327-1493 or TDD (916) 342-9531, or (800) 700-8326 for TDD calls outside the Sacramento area, by June 4, 1998.