February 7, 2007

MEMORANDUM

FROM:  	Richard Cook

	   	Assessment and Standards Division

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

SUBJECT:	Data Files for National-Scale Modeling of Air Quality, Exposure
and Risk from Mobile Source Air Toxics; Final Mobile Source Air Toxics
Rule

The purpose of this memorandum is to transmit input and output
datafiles, and models from national-scale modeling of air toxics done to
support the final mobile source air toxics rule.  This modeling is
documented in the technical report, “National Scale Modeling of Air
Toxics for the Final Mobile Source Air Toxics Rule; Technical Support
Document,” Report Number EPA-454/R-07002, as well as Sections 2.2.1
and 3.2 of the Regulatory Impact Analysis.  

These files are contained on 9 DVDs and one CD.  The CD contains README
files for the DVDs, a SAS program to convert Access files to SAS, and a 
checklist of all files included on the DVDs.

