                                       
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 Materials used in estimating CAPs and air toxics for the final light-duty vehicle 2017-2025 greenhouse gas rule
		
FROM:	Margaret Zawacki
		Assessment and Standards Division
		Office of Transportation and Air Quality

TO:		Docket EPA-HQ-OAR-2010-0799-DRAFT-XXXX

DATE:		August 6, 2012



The purpose of this memorandum is to transmit data files which were used in the air quality modeling analyses for the final light-duty vehicle 2017-2025 greenhouse gas rule.  The air quality modeling analyses are discussed in Section III.G of the preamble, Chapter 6 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 4 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 2030 baseline and LDGHG 2017-2025 control scenario

- toxics DBF files folder:  gridded annual and seasonal (winter/summer) toxics difference data for 2030 baseline and LDGHG 2017-2025 control scenario

- Ozone_DVs_LDGHG_2017-2025.xlsx:  county-level 8-hour max ozone Design Value projections for 2030 baseline and LDGHG 2017-2025 control scenario

- AnnualPM2.5_DVs_LDGHG_2017-2025.xlsx:  county-level annual PM2.5 Design Value projections for 2030 baseline and LDGHG 2017-2025 control scenario

- DailyPM2.5_DVs_LDGHG_2017_2025.xlsx:  county-level 24-hour PM2.5 Design Value projections for 2030 baseline and LDGHG 2017-2025 control scenario

- Visibility_LDGHG_2017-2025.xlsx:  Class 1 Area visibility projections for the 20% worst days for 2005 baseline, 2030 baseline and LDGHG 2017-2025 control scenario

- CMAQv4.7.1_Release Notes.doc: RELEASE_NOTES for CMAQv4.7.1 from ORD, Shawn Roselle

- met.2005.12EUS1.pdf:  Baker K. and P. Dolwick.  Meteorological Modeling Performance Evaluation for the Annual 2005 Eastern U.S. 12-km Domain Simulation, USEPA/OAQPS, February 2, 2009.

- met.2005.12WUS1.pdf:  Baker K. and P. Dolwick.  Meteorological Modeling Performance Evaluation for the Annual 2005 Western U.S. 12-km Domain Simulation, USEPA/OAQPS, February 2, 2009.

- met.2005.36US1.pdf:  Baker K. and P. Dolwick.  Meteorological Modeling Performance Evaluation for the Annual 2005 Continental U.S. 36-km Domain Simulation, USEPA/OAQPS, February 2, 2009.

Attachments
