December 11, 2009

MEMORANDUM

FROM:  	Kenneth Davidson

	   	Assessment and Standards Division

TO:	 	 Docket EPA-HQ-OAR-2007-0121

SUBJECT:	BenMAP Air Quality Modeling Data Files for Estimation of
Benefits for the Ocean Going Vessels (OGV) Final Rulemaking

The purpose of this memorandum is to transmit BenMAP air quality
modeling data input and configuration files used for the estimation of
PM and ozone-related benefits associated with the OGV FRM.  When used as
input files to the publicly-available Environmental Benefits Mapping and
Analysis Program (BenMAP), a user will be able to replicate the benefits
analysis results presented in the RIA for this rulemaking.  The summary
files are as follows:

File 1: C3_AirQualityGridFiles_BenMAP.zip

12km ambient PM and ozone air quality grid input data for BenMAP
(baseline and control for both 2020 and 2030) 

File 2: C3_AirQualityConfigurationFiles_BenMAP.zip

PM and ozone health effects configuration file for BenMAP (.cfg files)

PM and ozone health effects aggregation, pooling, and valuation file for
BenMAP (.apv files)

The benefits analysis is discussed in Section VIII of the preamble and
Chapter 6 of the Regulatory Impact Analysis.  

 BenMAP v. 3.0 is compatible with these files and can be downloaded at
http://www.epa.gov/air/benmap/download.html

