1 

Final Transport Rule Air Quality Modeling Data Drives 

EPA has placed in the docket data drives containing certain air quality modeling data 

files, run scripts, and codes that were used for the final Transport Rule. 

Information on the air quality modeling performed for the Transport Rule including a 

description of the modeling domains, model inputs, emissions scenarios, contribution 

modeling, and results can be found in the Air Quality Modeling Technical Support 

Document that is located in the Transport Rule docket. Information on the emissions 

data can be found in the Emissions Inventory Technical Support Document. Information 

on the AQAT calibration scenario can be found in the Significant Contribution and State 

Emissions Budget Technical Support Document. 

The data drives contain input/output data files for the emissions scenarios and modeling 

domains identified in Table 11. 

Table 1. Emissions scenarios modeled with CAMx for the final Transport Rule. 

Scenario Description Domains Modeled 

2005as 

2005 base year simulation for 

model evaluation 

12 km Eastern US 

[Initial and boundary concentrations 

extracted from 36 km CONUS model 

run for 2005cs] 

2005cs 

2005 base year simulation for 

projections 

12 km Eastern US and 

36 km Continental US (CONUS) 

2012cs 2012 base case 

12 km Eastern US and 

36 km CONUS 

2014cs 2014 base case 

12 km Eastern US and 

36 km CONUS 

2014cs_tr1remedy 

2014 "Air Quality-Assured 

Trading" scenario (remedy case) 

12 km Eastern US and 

36 km CONUS 

2014cs_noxsox 

2014 Air Quality Assessment Tool 

(AQAT) calibration scenario 

12 km Eastern US 

[Initial and boundary concentrations 

extracted from 36 km CONUS model 

run for 2014cs] 

2014cs_sox 

Sensitivity run with EGU SO2 

emissions from AQAT calibration 

scenario and EGU NOx and all 

other emissions from the 2014 

base case 

12 km Eastern US 

[Initial and boundary concentrations 

extracted from 36 km CONUS model 

run for 2014cs] 

 

1

 Note that the Modeled Attainment Test System (MATS) output files and configuration files for 

the 2012cs_o3tag and 2012cs_pmtag runs are contained on these drives. However, the MATS 

output files and configuration files for the other scenarios are provided as a separate entry in the 

Transport Rule docket. 
2 

Scenario Description Domains Modeled 

2014cs_GA_nox 

Sensitivity run with all 

anthropogenic NOx emissions 

removed (zero-out) in the state of 

Georgia; emissions for other 

pollutants from 2014 base case 

12 km Eastern US 

[Initial and boundary concentrations 

extracted from 36 km CONUS model 

run for 2014cs] 

2012cs_o3tag 

OSAT run using 2012 base case 

emissions 

12 km Eastern US 

[Initial and boundary concentrations 

extracted from 36 km CONUS model 

run for 2012cs] 

2012cs_pmtag 

PSAT run using 2012 base case 

emissions 

12 km Eastern US 

[Initial and boundary concentrations 

extracted from 36 km CONUS model 

run for 2012cs] 

The total volume of data is approximately 6 TB. The data are parsed across four 2 TB 

external hard drives. The directory structure of the data contained on each drive is 

provided in Table 2. 

EPA will respond to specific requests for subsets of the data or specific additional inputs 

and outputs of the modeling process, depending on the availability of those data. 

Requests for electronic copies of the Transport Rule air quality modeling data should be 

sent to Norm Possiel (possiel.norm@epa.gov) and Brian Timin (timin.brian@epa.gov) 

Table 2. Directory Structure for Final Transport Rule Air Quality Modeling Data Drives 

Drive 1 

\
3 

Drive 2 (Part A) 
4 

Drive 2 (Part B) 
5 

Drive 3 
6 

Drive 4