CALIFORNIA ENVIRONMENTAL PROTECTION AGENCY
                      AIR RESOURCES BOARD
                                
                      Air Resources Board
                Board Hearing Room, Lower Level
                        2020 "L" Street
                         Sacramento, CA
                                
                       February 10, 1994
                           9:30 a.m.
                                
                             AGENDA
                                                             Page

94-2-1    Public Hearing to Consider Adoption of              001
          Amendments to Regulations Regarding Evaporative
          Emission Standards and Test Procedures Applicable
          to 1995 and Subsequent Model-Year Passenger Cars,
          Light-Duty Trucks, Medium-Duty Vehicles, and Heavy-
          Duty Vehicles.

94-2-2    Public Meeting to Consider a Status Report on       ---
          the State's Efforts to Meet Federal Clean Air
          Act Requirements.

Other Business

                         ITEM NO.: 94-2-1

Public Hearing to Consider Adoption of Amendments to Regulations
Regarding Evaporative Emission Standards and Test Procedures
Applicable to 1995 and Subsequent Model-Year Passenger Cars,
Light-Duty Trucks, Medium-Duty Vehicles, and Heavy-Duty Vehicles.

                          RECOMMENDATION

The staff recommends that the Air Resources Board (the Board or
ARB) adopt amendments to the evaporative emission standards and
test procedures applicable to 1995 and subsequent model year
passenger cars, light-duty trucks, medium-duty vehicles, and
heavy-duty vehicles.

                            DISCUSSION

In August 1990, the Board adopted enhanced evaporative emission
test procedures which will result in substantial reductions of
evaporative emissions under severe ozone-prone summertime
conditions.  Compliance with the enhanced test procedures is to
be phase-in starting with the 1995 model year.  The United States
Environmental Protection Agency also adopted enhanced federal
evaporative emissions regulations on March 24, 1993, to be
phased-in starting with the 1996 model year.

The federal regulations include test procedures analogous to the
ARB enhanced test procedures as well as a supplemental test
procedure.  The supplemental test was adopted to ensure that
defeat devices were not used to delay purge in vehicles tested
under the enhanced test procedures.  Delaying initial, rapid
purge of stored fuel vapor may ultimately result in the release
of evaporative emissions into the atmosphere.

Since the defeat device restrictions are not easily enforceable
and since manufacturers are requesting consistent test
procedures, staff recommends that the Board adopt the federal
supplemental test.  The proposed amendments will require
manufacturers to conduct the supplemental test as well as the
enhanced test procedures for certification.  In addition, the
proposed amendments will more closely align the ARB and the
federal regulations by addressing a variety of relatively minor
technical differences between the two test procedures.

The staff recommends that the Board also adopt the enhanced test
procedures for the complete heavy medium-duty vehicle class,
8,501 - 14,000 lbs. gross vehicle weight rating.  This is
currently the only class of vehicles for which the enhanced test
procedures have not been adopted.

The majority of the proposed modifications would be implemented
in the 1996 model year in order to allow manufacturers adequate
lead time.  The 1996 model year implementation date is also
consistent with the start of the federal phase-in requirements. 
Some of the proposed modifications are clarifications of the
regulations and would be effective in the 1995 model year.  To
provide flexibility, manufacturers would be allowed the option of
implementing any of the 1996 model-year modifications one year
earlier in the 1995 model year as long as the Executive Officer
determines that the effectiveness of the evaporative emission
control system will not be diminished.

                       SUMMARY AND IMPACTS

The staff estimates that the proposed action will provide added
assurance that the emission benefits originally projected for the
enhanced test procedures will be realized.  In addition, the
closer alignment of the ARB enhanced test procedures with the
federal regulations will result in savings to manufacturers in
terms of resources, equipment, and time.  Adoption of the
enhanced test procedures for the complete heavy medium-duty
vehicle class will result in a small emissions benefit of 4 tons
per day by the year 2010.  The cost will be approximately $11 per
vehicle, with a favorable cost effectiveness of $0.17 per pound
of hydrocarbon reduced.