February 7, 2007

MEMORANDUM

FROM:  	Richard Cook

	   	Assessment and Standards Division

TO:	 	 Docket EPA-HQ-OAR-2005-0036

SUBJECT:	Reference Case Nonroad Inventories for Air Toxics from the
National Mobile Inventory Model (NMIM) for Air Quality Modeling in Final
Mobile Source Air Toxics Rule

The purpose of this memorandum is to transmit input files, county level
data, run specifications, and output files for NMIM runs used to develop
nonroad equipment reference case inventories for air toxics to be used
in air quality modeling for the final mobile source air toxics rule. 
These files are contained on 5 DVDs.  Development of these inventories
is described in Section 2.2.1.1.2 of the Regulatory Impact Analysis. 

