State of California
                      AIR RESOURCES BOARD
                     State Office Building
                     455 Golden Gate Avenue
                       San Francisco, CA
                        August 23, 1972
                           10:00 a.m.

1.   Approval of Minutes of August 9, 1972 Meeting.

2.   Report on Vacuum Spark Advance Disconnect Studies in

3.   Consideration of Application for Accreditation of NOx
     Control Devices for 1966-1970 Model Vehicles.

     a.   Echlin Corporation
     b.   Dana Corporation

4.   Vehicles Exempt from Required Exhaust Emission Control
     Device (1955-1965).

5.   Discussion of Device Installation Schedules for 1955-1965

6.   Gasoline Engine Emissions vs. Liquefied Petroleum Gas and
     Natural Gas Engine Emissions.

7.   Summary of New Car Approvals.

8.   Proposed Regulations of Gasoline Filling Losses from Vehicle
     Fuel Tank.

9.   Other Business.

     a.   Test Results of 1972 Model Renault Vehicles.
     b.   Used Car Control in Eastern Riverside and San
          Bernardino Counties.
     c.   Others.

10.  Remarks from the Audience.


Staff Report on Current and Projected Studies of Vacuum Spark
Advance Disconnect.

Because of continuing interest and controversy over the use of
vacuum spark advance disconnect (VSAD) as a means of partial
control of nitrogen oxides emissions the Board has undertaken
three contract studies and additional State studies of the
possible adverse effects.  The purpose of this report is to
describe these incomplete projects, with comment on preliminary
results where available.


Application for Accreditation of an Exhaust Emission Control
Device for Used Cars.

Echlin Corporation

At the June 21 meeting of the Air Resources Board, action was
deferred on Echlin Corporation's application for accreditation of
a device to control oxides of nitrogen (NOx) from 1966-1970 used
vehicles.  The basis for this deferral was concern for possible
adverse effects on vehicle performance; specifically, coolant
overheating and excessive valve wear in some vehicles.  Following
the June meeting, the Executive Officer suggested additional
tests and data which would be helpful in trying to resolve the
Board's reservations (letter attached).


Application for Accreditation of an Oxides of Nitrogen Exhaust
Emission Control Device for 1966-1970 Model Year Used Light-Duty
Motor Vehicles.

Perfect Circle Division, Dana Corporation

At the June 21 meeting of the Air Resources Board, a decision on
Dana corporation's application for accreditation of an oxides of
nitrogen (NOx) exhaust emission control device for all 1966-1970
model year used light-duty motor vehicles was deferred due to the
Board's reservations concerning driveability and durability.


Exemption of Accredited Exhaust Emission Control Devices for 1955
through 1965 Model Year Vehicles.

Exhaust emission controls for 1955-65 model year vehicles are
required per Section 39129 of the Health and Safety Code and are
to be implemented under Air Resources Board Resolution 72-39A
effective September 1, 1972.  Device installation on these
vehicles is required upon transfer of ownership in Los Angeles,
Orange, Ventura and Santa Barbara Counties and those portions of
San Bernardino and Riverside Counties where crankcase emission
devices are presently required.

The above exhaust emission controls as accredited by the Board
did not apply to vehicles with engines less than 140 cubic inch
displacement.  In addition, Sections 39126 and 39177 of the
Health and Safety Code allow exemptions for vehicles subject to
registration which can not be fitted with either the accredited
Air Quality Products or General Motors exhaust emission control

The staff has contacted the above manufacturers to determine the
specific models or engine designs to which their device is not
applicable.  The attached Executive Order lists those 1955-65
model year vehicles which are exempt at this time from the
required installation of an accredited exhaust emission control


Device Installation Schedule for 1955-1965 Vehicles.

At the April 19 meeting of the Air Resources Board, the
Interagency Enforcement and Compliance committee reported its
recommendations on a schedule for the mandatory installation of
exhaust emission control devices for 1955 through 1965 vehicles.

The Committee recommended that mandatory installation be started
in the San Francisco Bay Area 90 days after the installation
starts in the South Coast Air Basin and in the San Diego area 30
days after the start of installation in San Francisco.  Selected
air basins among the remaining air basins would start on dates to
be established later.

The Department of Motor Vehicles has requested that the Board
discuss this proposed schedule and its relation to the problems
of annual registration (see attached letter).  The discussion may
also bear upon the installation schedule for the 1966-1970 NOx
device program.  A representative from the Department is here to
discuss installation schedule as it relates to registration


Comparison of Exhaust Emissions, Gasoline Engines vs. Liquefied
Petroleum Gas and Natural Gas Engines.

The Air Resources Board Laboratory has for several years
conducted surveillance tests of used cars equipped with exhaust
emission control systems.  Previous reports have emphasized test
results from cars operating on gasoline.  This report concerns
surveillance test results from cars operating on natural gas and
liquefied petroleum gas (LPG) and compares these results with
that obtained from testing 1971 and 1972 model cards operating on


Summary of Executive Orders Issued in Accordance with Resolution

On July 19, 1972, the Board adopted Resolution 72-104 which
defined those official actions which could be taken by the
Executive Officer without formal Board action.  The Board
requested the Executive Officer to keep it informed of approvals
granted.  This report is a summary of new car approvals that had
been granted at the time this report was prepared.


Proposed Regulation for Controlling Hydrocarbon Filling Losses
from Vehicle Fuel Tanks.

The emission of hydrocarbons into the atmosphere because of
filling automobile gasoline tanks constitutes about 60% of the
total emissions occurring in Los Angeles County during the
marketing of gasoline.  Expressed in other terms, filling
automobile gasoline tanks results in 6.0 grams of hydrocarbon
loss per gallon of gasoline transferred.  The 1975 Federal
exhaust emission hydrocarbon standard is equivalent to about 5.6
grams of hydrocarbon per gallon of gasoline, which is less than
the filling loss.  In view of these facts, the previous Air
Resources Board instructed the staff to proceed with developing
regulations to control hydrocarbon filling losses for vehicle
fuel tanks.


1972 Renault Vehicles Oxides of Nitrogen Tests.

During the May 17, 1972, Air Resources Board meeting, approval
was granted to Renault, Incorporated for its engine family 807. 
Because the reported oxides of nitrogen emission values were
unusually low, the Board Chairman requested the staff to have
this new model vehicle tested in the Board's laboratory.


Used Car Control in Eastern Riverside and San Bernardino

On July 28, 1972, the Governor directed the Air Resources Board
and the Department of Motor Vehicles to extend crankcase and
exhaust control device requirements to the eastern portions of
Riverside and San Bernardino Counties.

The authority to extend crankcase devices to the entire county
lies in each case with the county air pollution control district
(Section 24263.8, Health and Safety Code).  The Air Resources
Board may require installation of the exhaust device in any areas
in the State.

It would probably be desirable, particularly from the Department
of Motor Vehicles' point of view, to extend both programs at the
same time.  Accordingly, the staff recommends that extension of
the exhaust device program be tied to extension of the crankcase
device and further recommends that the Board urge the counties of
Riverside and San Bernardino to extend the crankcase device at
the earliest possible time that can be arranged with the
Department of Motor Vehicles.

Riverside County is already considering extending the crankcase


Conversion of All Gasoline Powered Vehicles in the South Coast
Basin to Gaseous Fuels.

The City of Riverside requested that Governor Reagan declare a
State of Emergency in the South Coast Air Basin and mandate the
conversion of 7,000,000 vehicles in the basin from gasoline to
gaseous fuels.  The Riverside plan proposes to use natural gas to
replace about 25 percent of the present gasoline consumed and
liquefied petroleum gas to replace the remaining 75 percent.  The
conversion is to be completed in the 4-year period starting on
January 1, 1973 and ending on December 31, 1976.

A public hearing was held by the Air Resources Board on August 17
and 18, 1972 to obtain information on the availability of gaseous
fuels and conversion equipment, the adequacy of existing fuel
distribution facilities, the costs and benefits of such
conversions and other related matters.

Testimony was received from representatives of the City of
Riverside, fuel suppliers and distributors, fuel users,
conversion equipment manufacturers and suppliers, local air
pollution control authorities and the general public.