UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2565 PLYMOUTH ROAD

ANN ARBOR, MICHIGAN 48105-2498

OFFICE OF

AIR AND RADIATION

                                                                        
          	     

MEMORANDUM

SUBJECT:	Emissions Modeling Data Files for Proposed Tier 3 Motor Vehicle
Emission and Fuel Standards

		

FROM:	Margaret Zawacki

		Assessment and Standards Division, Office of Transportation and Air
Quality

		Rich Mason

		Emissions Inventory and Analysis Group, Office of Air Quality Planning
and Standards

TO:		Docket EPA-HQ-OAR-2011-0135-DRAFT-####

DATE:		March 13, 2013

The purpose of this memorandum is to transmit emissions modeling data
files which were used in the air quality modeling for the proposed Tier
3 motor vehicle emissions and fuel standards.  The emissions modeling
analyses are discussed in the Emissions Inventory for Air Quality
Modeling Technical Support Document: Proposed Tier 3 Motor Vehicle
Emission and Fuel Standards.  The air quality modeling analysis results
are able to be replicated by using the data files provided here and the
information in the Air Quality Modeling Technical Support Document:
Proposed Tier 3 Motor Vehicle Emission and Fuel Standards.  Following is
a brief description of the information contained on the enclosed DVD.

The files contain county level delimited summaries for criteria
pollutants and select hazardous air pollutants (e.g. benzene,
acetaldehyde, formaldehyde, acrolein, 1,3-butadiene, ethanol) by
emissions modeling sector for the scenarios listed below.  Summaries are
included by month using average day emissions and separately with annual
totals for the following scenarios: 2005 baseline, 2017 reference case,
2017 control case, 2030 reference case, and 2030 control case.  

The files contained on the enclosed disc are
“tier3_database_description final.docx”,
“tier3_annual_county_sector.xlsx” and
“county_month_oct142011.mdb”.

Attachments

