                                       

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 Heavy-Duty GHG Phase 2 Standards
		
FROM:	Margaret Zawacki
		Assessment and Standards Division
		Office of Transportation and Air Quality

TO:		Docket EPA-HQ-OAR-2014-0827

DATE:		July 26, 2016



The purpose of this memorandum is to transmit data files which were used in the air quality modeling analyses for the Final Heavy-Duty GHG Phase 2 Standards.  The air quality modeling analyses are discussed in Section VIII.D.2 of the preamble, Chapter 6.2.2 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 Chapter 5 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 2040 reference case and HDGHG2 control scenario

- toxics DBF files folder:  gridded annual and seasonal (winter/summer) toxics difference data for 2040 reference case and HDGHG2 control scenario

- HDGHG2_Final_Ozone_DVs.xlsx:  county-level 8-hour max ozone Design Value projections for 2040 reference case and HDGHG2 control scenario

- HDGHG2_Final_annualPM_DVs.xlsx:  county-level annual PM2.5 Design Value projections for 2040 reference case and HDGHG2 control scenario

- HDGHG2_Final_dailyPM_dvs.xlsx:  county-level 24-hour PM2.5 Design Value projections for 2040 reference case and HDGHG2 control scenario

- HDGHG2_Final_Visibility.xlsx:  Class 1 Area visibility projections for the 20% worst days for 2011 reference case, 2040 reference case and HDGHG2 control scenario

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

- CMAQv5.0.2_Release Notes.docx: RELEASE_NOTES for CMAQv5.0.2 

- MET_TSD_2011_final_11-26-14.pdf:  Misenis, C.  Meteorological Model Performance for Annual 2011 WRF v3.4 Simulation, USEPA/OAQPS, November 26, 2014.



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