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MEMORANDUM FOR THE DOCKET
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Subject:	Input data for the ozone and PM2.5 environmental justice exposure analysis completed using BenMAP-CE as part of the Regulatory Impact Analysis for the Proposed National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units Review of the Residual Risk and Technology Review
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Date: 		March 20, 2023
EPA has placed into docket number EPA-HQ-OAR-2018-0794 files used in generating the EJ exposure analysis completed using BenMAP-CE as part of the Regulatory Impact Analysis for the Proposed National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units Review of the Residual Risk and Technology Review. The assessment was completed using BenMAP-CE version 1.5.8.22. Population-weighted exposure estimates can be reproduced either by performing individual parameterized runs for a given air quality scenario using the BenMAP graphical user interface (GUI) or performing batch runs using scripts. However, the latter method is recommended.
BenMAP runs were batch processed using command line and a written script. The full set of estimates can be reproduced using the automation script files available in the docket materials, which can be run from the command prompt using the input air quality surface files. See Appendix L of the BenMAP manual for additional details on running BenMAP through the command line and the Estimating PM2.5- and Ozone-Attributable Health Benefits Technical Support Document (TSD) for additional information of selection of health endpoints and concentration-response relationships.
Standard BenMAP folders are included in the docket materials, described below. Script files can be reviewed and modified in a text editor such as Notepad++, which includes comments preceded by "#". Three script files were used for this analysis.:
 "MATS_RTR_PM_2028&2030&2035_EJ_exposure.ctlx" produces the aggregated and distributional PM2.5 exposure results 
 "MATS_RTR_Ozone_2028&2030&2035_EJ_exposure.ctlx" produces the aggregated and distributional ozone exposure results

Prior to running the script from the command line, several subdirectory pointers within the automation code must be set to where the user has placed the input files and results directories for outputs (e.g., "[INSERT FILE LOCATION]"). Imbedded notes within the automation code highlight the pointers which must be updated, which appear near the beginning of the script files. Once pointers have been updated and the required input files have been placed in the appropriate subdirectories (see below), then the script run is initiated with the below commands from the command prompt: 
 Direct the command line prompt to the location where the BenMAP program is located (e.g., "cd\program files (x86)\BenMAP-CE") and hit Enter
 Direct the command line prompt to the script file (e.g., start/wait "" "C:\program files (x86)\benmap-ce\benmap.exe" "C:\[INSERT FILE LOCATION}\ MATS_RTR_PM_2028&2030&2035_EJ_exposure.ctlx")

In order to run the automated scripts, make sure that the following subdirectories have been created, include the necessary input files, and the scripts have been edited to their location:

 "Inputs" Containing the air quality grid .csv (or .xlsx) files
 "AQG" Will be the location of output .aqgx air quality gridded surface files
 "CFG" Containing the BenMAP configuration file used as the basis for generating risk estimates, e.g., 2028_Ozone_exposure.cfgx
 "APV" Contains BenMAP aggregation and pooling file which allows .apvx and .cfgrx reports containing the risk estimates to be generated, e.g., 2030_Ozone_exposure.apvx
 "Reports" Will be the location of exposure output .csv files. Please add this folder to your intended file location.
 "Results" Will be the location of exposure output .cfgrx and .apvrx files. Please add this folder to your intended file location.

