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 we re used for the final Transport Rule.

Information on the air quality modeling perf ormed for the Transport Rule including a description of the modeling domains, model inputs, emissions scen arios, contribution modeling, and results can be found in th e 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 Inventor y 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 f iles for the emissions scenarios and modeling
domains identified in Table 1 1

.

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 c ontained on these drives. However, the MATS output files and configuration files for the othe r 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 a pproximately 6 TB. The data are parsed across four 2 TB
external hard drives. The di rectory structure of the data contained on each drive is provided in Table 2.

EPA will respond to specific re quests 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 Transpor t 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 Trans port Rule Air Quality Modeling Data Drives



### Drive 1

\3 

### Drive 2 (Part A)4 

### Drive 2 (Part B)5 

### Drive 36 

### Drive 4