                                       
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:	Air Quality Modeling Outputs for the Final Tier 3 Motor Vehicle Emission and Fuel Standards
		
FROM:	Margaret Zawacki
		Assessment and Standards Division
		Office of Transportation and Air Quality

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

DATE:		February 20, 2014



The purpose of this memorandum is to transmit data files which were used in the air quality modeling analyses for the Tier 3 Motor Vehicle Emission and Fuel Standards.  The air quality modeling analyses are discussed in Section III.C of the preamble, Section 7.2.2  -  Section 7.2.4 of the Regulatory Impact Analysis (RIA) and in the Air Quality Modeling Technical Support Document.  Information on the air quality modeling inventories is discussed in Section 7.2.1 of the RIA.  

Following is a list of the information contained on the enclosed disc:

- deposition DBF files folder: gridded annual nitrogen and sulfur deposition difference data for 2018 and 2030 reference cases and Tier 3 control scenarios

- toxics DBF files folder:  gridded annual and seasonal (winter/summer) toxics difference data for 2018 and 2030 reference cases and Tier 3 control scenarios

- TIER3_Final_Ozone_DVs.xlsx:  county-level 8-hour max ozone Design Value projections for 2018 and 2030 reference cases and Tier 3 control scenarios

- TIER3_Final_annualPM_DVs.xlsx:  county-level annual PM2.5 Design Value projections for 2018 and 2030 reference cases and Tier 3 control scenarios

- TIER3_Final_dailyPM_dvs.xlsx:  county-level 24-hour PM2.5 Design Value projections for 2018 and 2030 reference cases and Tier 3 control scenarios

- TIER3_Final_Visibility.xlsx:  Class 1 Area visibility projections for the 20% worst days for 2007 reference case, 2018 and 2030 reference cases and Tier 3 control scenarios

- CMAQv5.0_Release Notes.docx: RELEASE_NOTES for CMAQv5.0 

- CMAQv5.0.1_Release Notes.docx: RELEASE_NOTES for CMAQv5.0.1 

- WRF_v3 3_2007_Performance_July2012.pdf:  Misenis, C.  Meteorological Model Performance for Annual 2007 Simulation WRF v3.3, USEPA/OAQPS, July 15, 2012.



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