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MATS Final Rule Case Study Air Quality Modeling Data Drive

EPA has placed in the docket a data drive containing certain air quality modeling data files, and 

codes that were used for the final MATS rule for the case studies in the Appropriate and 

Necessary analyses. Information on the air quality modeling performed for this rule including a 

description of the model inputs, emissions, and results can be found in the Non-Hg Case Study

Technical Support Document that is located in the MATS Rule docket.

The following information is contained on this data drive. All air quality model inputs, outputs,

run scripts, and source code are listed in Appendix A.

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

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

relevant data and inputs used in the air quality modeling are incorporated into the docket. 

Requests for electronic copies of the air quality modeling data used for this rule should be sent to 

Tyler Fox (fox.tyler@epa.gov).
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Appendix A: Modeling Inputs and Outputs

File: emissions_prop.zip

Description: Annual emissions of HAPs by facility and source group. The zipfile contains a 

folder for each facility. Within each facility’s folder is a file called annual_emissions.txt, which

lists annual emissions (tons/year) for each HAP by source group. 

Format of annual_emissions.txt

Column Description

Anchor HAP Integer indicating that HAP is the HAP whose emissions are in the hourly AERMOD input 

emissions files. If the number is 1, then the HAP is the anchor HAP. Otherwise, the number is 

zero

HAP NAME Pollutant name

SOURCE ID AERMOD source identifier

EMISSIONS Annual emissions (tons/year) for HAP and SOURCE ID

URE HAP’s unit risk estimate for cancer

Rfc HAP’s reference concentration for non-cancer effects

ORGANS Text string of numbers to indicate if a HAP affects a particular organ system. A 1 indicates the 

HAP affects the organ system, a 0 indicates it does not. Order of organs are: respiratory, liver, 

neurological, developmental, reproductive, kidney, ocular, endocrine, hematological, 

immunological, skeletal, spleen, and thyroid

File: emis_hourly_prop.zip

Description: Hourly emissions of anchor HAP by facility and source group. The zipfile contains 

a SAS dataset for each facility covering 2005-2009.
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File: chesapeake.inp

Description: AERMOD input/output files for Chesapeake case study.

File(s) Description

ORF.SFC AERMOD input surface meteorological files for 2005- 2009

ORF.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

urban_sources.txt AERMOD urban sources file

Folders as, cr, ni within folder chesapeake Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, CHES0001.PLT, 

CHES0002.PLT, CHES0003.PLT, 

CHES0004.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.

File: conesville.inp

Description: AERMOD input/output files for Conesville case study.

File(s) Description

ZZV.SFC AERMOD input surface meteorological files for 2005- 2009

ZZV.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder conesville Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, CONE0001.PLT, 

CONE0002.PLT, CONE0003.PLT, 

CONE0004.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.
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File: gallatin.inp

Description: AERMOD input/output files for Gallatin case study.

File(s) Description

BNA.SFC AERMOD input surface meteorological files for 2005- 2009

BNA.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder gallatin Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, SK001.PLT, SK002.PLT, 

SK003.PLT, SK004.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.

File: james_river.inp

Description: AERMOD input/output files for James River case study.

File(s) Description

SGF.SFC AERMOD input surface meteorological files for 2005- 2009

SGF.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder james_river Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, JAMES001.PLT, 

JAMES002.PLT, JAMES003.PLT, 

JAMES004.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.
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File: labadie.inp

Description: AERMOD input/output files for Labadie case study.

File(s) Description

STL.SFC AERMOD input surface meteorological files for 2005- 2009

STL.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder labadie Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, LABA0001.PLT, 

LABA0002.PLT, LABA0003.PLT, 

LABA0004.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.

File: merrimack.inp

Description: AERMOD input/output files for Merrimack case study.

File(s) Description

CON1.SFC AERMOD input surface meteorological files for 2005- 2009

CON1.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder merrimack Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, MERR0001.PLT, 

MERR0002.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.
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File: muskogee.inp

Description: AERMOD input/output files for Muskogee case study.

File(s) Description

MKO.SFC AERMOD input surface meteorological files for 2005- 2009

MKO.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder muskogee Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, MUSK0001.PLT, 

MUSK0002.PLT, MUSK0003.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.

File: waiau.inp

Description: AERMOD input/output files for Waiau case study.

File(s) Description

HNL.SFC AERMOD input surface meteorological files for 2005- 2009

HNL.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

Buildings.dat Buildling dimensions file

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

urban_sources.txt AERMOD urban sources file

Folders as, cr, ni within folder waiau Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, WAIA0001.PLT, 

WAIA0002.PLT, WAIA0003.PLT, 

WAIA0004.PLT, WAIA0005.PLT, 

WAIA0006.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.
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File: yorktown.inp

Description: AERMOD input/output files for Yorktown case study.

File(s) Description

PHF.SFC AERMOD input surface meteorological files for 2005- 2009

PHF.PFL AERMOD input profile meteorological files for 2005- 2009.

REC_BLOCKS.DAT Census block receptor UTM coordinates with receptor elevations

Buildings.dat Buildling dimensions file

SOURCES.DAT Source elevations

source_groups.txt AERMOD source groups file

source_params.txt AERMOD source parameters file

Folders as, cr, ni within folder waiau Folders for Arsenic, Chromium VI, and Nickel. The folders contain 

the files listed below as well as the AERMOD executable and 

AERMOD.INP file. Emissions and concentrations are for the 

pollutant listed as the folder name (Arsenic=as, Chromium VI=cr, and 

Nickel=ni)

Hourly_emissions.txt Hourly emissions by emission point.

Hourly.txt AERMOD include file listing each AERMOD source id and hourly 

emissions file (hourly_emissions.txt)

AERMOD.OUT, ERRORS.OUT AERMOD output file and ERRORS output file

ALL.PLT, YORK0003.PLT, 

YORK0012.PLT

5-year average concentrations across all sources (ALL.PLT) and by 

source group.
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File: post.zip

Description: Contains the 5-year average risks, HAP specific HQ, and organ specific HI for each 

facility as well as the SAS post-processing program post_final.sas. Each facility is an Excel 

workbook with risks (sheets beginning with “risk”) and non-cancer effects (sheets beginning 

with “hq”) for each source group and across all source groups. Risk spreadsheets contain the 

following:

Column description

Grp Source group

X Receptor UTM X-coordinate

Y Receptor UTM Y-coordinate

As Arsenic 5-year average concentration ( g/m3

)

Cr Chromium VI 5-year average concentration ( g/m3

)

Ni Nickel 5-year average concentration ( g/m3

)

As_risk Arsenic 5-year average risk

Cr_risk Chromium VI 5-year average risk

Ni_risk1 Nickel 5-year average risk (using proposal URE)

Ni_risk2 Nickel 5-year average risk (using final URE)

Totrisk1 Total (all HAPs) 5-year average risk (as_risk+cr_risk+ni_risk1)

Totrisk2 Total (all HAPs) 5-year average risk (as_risk+cr_risk+ni_risk2)

Non-cancer spreadsheets contain the following:

Column description

Grp Source group

X Receptor UTM X-coordinate

Y Receptor UTM Y-coordinate

As Arsenic 5-year average concentration ( g/m3

)

Cr Chromium VI 5-year average concentration ( g/m3

)

Ni Nickel 5-year average concentration ( g/m3

)

As_hq Arsenic 5-year average hazard quotient

Cr_hq Chromium VI 5-year average hazard quotient

Ni_hq Nickel 5-year average hazard quotient

Resp_hi Respiratory system 5-year average hazard index

Develop_hi Developmental system 5-year average hazard index

immune_hi Immunological system 5-year average hazard index