San Diego County Admin. Bldg.
Board of Supervisors Chambers
Room 310
1600 Pacific Coast Highway
San Diego, CA

September 25, 1986
10:30 a.m.



86-11-1 Report of the Board Committee on Visibility. 001

86-11-2 Public meeting to Consider the Need for 033
Controlling Airborne Ethylene Dibromide.

86-11-3 Withdrawal of Request from General Motors to 084
Relax the NOx Emission Standards for Certain
Heavy-Duty Engines Certified in Medium-Duty Trucks.

86-11-4 Consideration of Appointments to the Agricultural 088
Advisory Committee.

86-11-5 Status Report on the San Diego Air Pollution Control

Other Business

a. Closed Session
1. Personnel (as authorized by State Agency Open Meeting
Act, Govt. Code Sec. 11126(a).).
2. Litigation (Pursuant to the attorney-client privilege,
Evidence Code Sec. 950-962, and Govt. Code Sec.
b. Research Proposals
c. Delegations to Executive Officer

ITEM NO.: 86-11-3

Withdrawal of Request from General Motors to Relax the NOx
Emission Standards for Certain Heavy-Duty Engines Certified in
Medium-Duty Trucks.


General Motors (GM) formally proposed changes to the heavy-duty
gasoline engine emission standards at the April, 1986 Air
Resources Board (the "Board") hearing. GM planned on certifying
most of its heavy-duty gasoline vehicles in California using the
medium-duty vehicle regulations. Some of these vehicles would
have to comply with 1.5 gram per mile (g/mi) NOx standard while
others would have to meet a 1.0 g/mi NOx standard. GM believed
that some of its vehicles could not comply with the 1.0 g/mi NOx
standard and therefore requested that all heavy-duty vehicles
certified to the medium-duty requirements be allowed to meet 1.4
g/mi NOx standard. GM believed that an emission benefit would be
realized by its proposal compared to the newly adopted heavy-duty

The GM proposal was discussed extensively at the April, 1986
hearing, and the Board directed the staff to return with
additional information on the benefits analysis generated by GM.
In July, 1986 the staff presented additional analysis to the
Board which showed that the environmental impact of the GM
proposal compared to other options is dependent upon the actions
of consumers and vehicle manufacturers and therefore is difficult
to analyze. The Board voted to have the staff develop a
regulatory proposal in response to GM's request and have the
staff further analyze the proposal's impacts. The staff was also
directed to look into the medium-duty vehicle category for
possible regulatory amendments in 1987.

In an August 1, 1986, letter to the Board, GM withdrew its
proposal, since it had certified for sale in California the
trucks which it had previously believed would not comply with the
1.0 g/mi NOx standard. Consequently, the staff has dropped its
plan to present the GM proposal to the Board. However, the staff
is continuing to evaluate the medium-duty truck regulations.

The staff will present a chronology of the events and issues
associated with the GM proposal, present the GM certification
data, and discuss its plans for the revision of the emission
standards for medium-duty trucks.


Consideration of Appointments to the Agricultural Advisory


Approve recommended appointments to Agricultural Advisory


At the September Board meeting the "Board" will consider the
appointment of two members of the Agricultural Advisory Committee
pursuant to Section 39603(b) of the Health and Safety Code.
Vacancies on the committee were created by the departure of
Alfred C. Perrin, CA Agricultural Committee Assn. and Lucinda
Chipporoni, Agricultural Council of CA. The names and
affiliations of the individuals recommended to replace Mr. Perrin
and Ms. Chipponeri are provided below:


Ed Romano* Alfred C. Perrin
CA Agricultural CA Agricultural
Commission Assn. Commission Assn.

John Segale* Lucinda Chipponeri
Agricultural Council of CA Agricultural Council of CA

(*Biographical sketches are provided in Attachment 1.)

On December 9, 1982 the Board established the Agricultural
Advisory Committee and appointed its members. The Board
reconfirmed the committee, its continuing members, and appointed
new members on November 18, 1983.

The committee was formed to provide representatives of a number
of diverse agricultural interests an opportunity to act
collectively to improve the public's awareness of the adverse
impacts of air pollution on agriculture and enhance the Air
Resources Board's knowledge of agricultural concerns.

Responsibilities of the committee include the following:

- foster the flow of current information to the public on air
pollution effects on vegetation,

- advise the ARB Research Division staff of appropriate topics
for investigation of air pollution effects on vegetation,

- alert ARB staff to concerns about the various effects of air
pollution on vegetation and possible methods to reduce the

- enhance communication and cooperation in implementing
regulatory efforts of the ARB which impact their

- participate in workshops and meetings designed to
communicate information from recent research regarding air
pollution effects on agriculture.