CALIFORNIA AIR RESOURCES BOARD
                                
                         Lincoln Plaza
                    Auditorium, First Floor
                         400 "P" Street
                         Sacramento, CA
                                
                       September 15, 1989
                           8:30 a.m.
                                
                             AGENDA

                                                             Page

89-17-1   Public Hearing to Consider Amendments of            001
          Regulations to Establish Certification Standards
          and Test Procedures for New Heavy-Duty Vehicles
          and Engines Fueled with Compressed Natural Gas
          or Liquefied Petroleum Gas.

89-17-2   Report on Bay Area Air Quality Management District  104
          Actions in Response to Recommendations Contained
          in the 1988 Joint ARB/EPA Evaluation Report.

89-17-3   Public Hearing to Consider the Adoption of          193
          Amendments to the Fee Schedule and List of
          Substances and to the Emission Inventory Criteria
          and Guidelines Regulations Pursuant to the Air
          Toxics "Hot Spots" Information and Assessment Act
          of 1987.

89-17-4   Consideration of Research Proposals:                412

          Proposal Number 182-34, entitled "Effects of Acidity
          and Ozone on Airway Epithelium", submitted by the
          University of California, San Francisco, for a total
          amount not to exceed $204,55.


          Proposal Number 184-34, entitled "The Application of
          the Alpine Lake Forecaster to Watersheds in the Sierra
          Nevada", submitted by the U.S. Geological Survey, for a
          total amount not to exceed $83,791.


          Proposal Number 186-34, entitled "Pilot Studies to
          Develop Sensitive Markers for Detecting Health Effects
          of Acidic Atmospheres", submitted by the University
          of Cincinnati, for a total amount not to exceed
          $119,746.


          Proposal Number 189-34, entitled "Pilot Studies to
          Develop Sensitive Markers for Detecting Health Effects
          of Acidic Atmospheres", submitted by the University of
          California, Irvine, for a total amount not to exceed
          $122,924.

          Proposal Number 193-34, entitled "Southern California
          Air Quality Study - Atmospheric Acidity Data Analysis",
          submitted by AV Projects Inc., for a total amount not
          to exceed $145,292.


          Proposal Number 194-34, entitled "The Influence of
          Particle Size and Meteorology on Dry Deposition of
          Atmospheric Acids in the South Coast Air Basin",
          submitted by Carnegie-Mellon University, for a total
          amount not to exceed $52,588.

          Proposal Number 201-34, entitled "Wet Deposition
          Monitoring in the Alpine Zone in the Sierra Nevada",
          submitted by the University of California, Santa
          Barbara, for a total not to exceed $469,798.

                             SUMMARY

                          ITEM #89-17-1

Public Hearing to Consider Amendments of Regulations to Establish
Certification Standards and Test Procedures for New Heavy-Duty
Vehicles and Engines Fueled with Compressed Natural Gas or
Liquefied Petroleum Gas.

                          RECOMMENDATION

The staff recommends that the Board establish certification
standards and test procedures applicable to new heavy-duty
vehicle engines fueled with natural gas or liquefied petroleum
gas.

                            DISCUSSION

Due to the difficulty in meeting the State Ambient Air Quality
Standards (SAAQS) for ozone and particulate matter in the South
Coast Air Basin and other parts of the State, much emphasis has
centered around the substitution of cleaner-burning fuels for
gasoline and diesel fuel.  The most viable substitutes are
methanol and ethanol, electricity, compressed natural gas (CNG),
and liquefied petroleum gas (LPG).  The Air Resources Board (ARB)
along with the California Energy Commission, the South Coast Air
Quality Management District (SCAQMD), and the Federal
Environmental Protection Agency (EPA) have all been involved in 
promoting the use of these alternate cleaner-burning fuels as a
means of improving air quality.  In parallel with this
governmental activity, heavy-duty engine manufacturers are
investigating the use of alternate fuels as a means of meeting
the 5.0 g/bhp-hr NOx and 0.10 g/bhp-hr particulate standards
which are applicable to diesel engines used in urban buses
beginning in 1991 and to other heavy-duty engines beginning in
1994.  These future standards for diesels, once thought only
attainable through the use of particulate-trap technology, now
seem attainable through the use of gaseous fuels or methanol. 
This need to meet the particulate standards has led industry to
request that appropriate certification procedures be adopted by
the ARB for new gaseous-fuel engines.

This proposal establishes procedures for the certification of new
1991 and subsequent model heavy-duty motor vehicle engines fueled
by compressed natural gas or liquefied petroleum gas (gaseous
fuels), either separately or in combination with other fuels. 
The proposed test procedures would be incorporated into the
existing heavy-duty Otto- and Diesel-cycle engine certification
test procedures.  All classes of heavy-duty gaseous-fuel engines
would be required to meet the California exhaust emission
standards which are applicable to heavy-duty Otto- and Diesel-Cycle 
engines, or new optional standards for non-methane
hydrocarbon emissions.  Certification test fuels, fueling
protocol and other procedures are also proposed.