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 heavy-duty vehicle greenhouse gas rule

		

FROM:	Margaret Zawacki

		Assessment and Standards Division

		Office of Transportation and Air Quality

TO:		Docket EPA-HQ-OAR-2010-0162

DATE:		July 14, 2011

The purpose of this memorandum is to transmit data files which were used
in the air quality modeling analyses for the final heavy-duty vehicle
greenhouse gas rule.  The air quality modeling analyses are discussed in
Section VII.D of the preamble, Chapter 8 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,
which can be found at the US Docketing Center: 

EPA West Building, Room 3334

1301 Constitution Avenue, NW

Washington, DC 20004

Telephone: (202) 566-1744

- deposition DBF files folder: gridded annual nitrogen and sulfur
deposition difference data for 2030 baseline and HDGHG control scenario

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

- Ozone_DVs_hdghg.xlsx:  county-level 8-hour max ozone Design Value
projections for 2030 baseline and HDGHG control scenario

- HDGHG_annualpm_DVs.xlsx:  county-level annual PM2.5 Design Value
projections for 2030 baseline and HDGHG control scenario

- HDGHG_AltdailyPM_dvs.xlsx:  county-level 24-hour PM2.5 Design Value
projections for 2030 baseline and HDGHG control scenario

- Vis_HDGHG.xlsx:  Class 1 Area visibility projections for the 20% worst
days for 2005 baseline, 2030 baseline and HDGHG 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

