California Air Resources Board

Reference Number 58 - Light-duty fleet composite organic gas emission profiles derived from ARB in-use surveillance data

This report covers the data for 1994 testing and the methodology was then applied to 1996 test data. Profiles from the 1996 testing were used for the MTBE fuel and were also used as part of the basis for constructing the organic gas profiles for EtOH (ethanol) 2% O (oxygenate) gasolines.

The methane fraction in catalyst exhaust was clearly seen to increase as exhaust THC decreased.  This relationship, as seen in the MTBE gasolines, was also used to project yearly methane fractions for ethanol gasolines.  All other exhaust compounds are renormalized.  Organic gas profiles for all other emission categories vary only with fuel composition.

The 1996 test data, from which the MTBE and EtOH containing fuel profiles were derived (via the adjustments in 'ogexh04.doc') are shown in the documents, below (note, especially, Attachment A2):

ogexh04.doc

Main Report

Main Report Update

Appendix A - Emissions

Attachment A1 - Peer Review of Organic Gas Emission Profiles

Attachment A2 - Tables of Organic Gas Emission Profiles

Attachment A3 - Tables of Organic Gas Profiles from Emission Testing

Reference Number 25 - Improvement of the Emission Inventory for Reactive Organic Gases and Oxides of Nitrogen in the South Coast Air Basin

Reference Number 23 - U.S. EPA, SPECIATE database

Reference Number 20 - OMNI:  J.E. Houck, et al., "Determination of Particle Size Distribution Composition of Particulate Matter from Selected Sources in California", ARB Contract  A6-175-32, OMNI Environmental Services, Inc., Beaverton OR, Desert
Research Instit., Reno NV; June 1989.

Reference Number 17 - H.J. Taback, et al., "Fine Particle Emissions From Stationary and Miscellaneous Sources in the South Coast Air Basin", KVB 5806-783; KVB, Inc., Tustin,
California, February 1979.

Reference Number 14 - E.H. Pechan degreasing study, ARB Contract No. 93-341, December 1995

Reference Number 13 - CRPAQS, data from Karen Magliano, ARB, PM 10 samples were collected in 1997 from San Joaquin Valley

Reference Number 12 - PM10 Source Composition Library for the South Coast Air Basin, Volume I and II

Reference Number 9 - Atmospheric Pollutant Emission Factors from Open Burning of Agricultural and Forest Biomass by Wind Tunnel Simulations, Vol. 1-3

Reference Number 8 - ARB MTBE/Ethanol study 1997

Reference Number 8 - ARB MTBE/Ethanol study 1997