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### Final Transport Rule Modeled Attainment Test Software (MATS) Output Files D VD

EPA has placed in the docket a D VD containing certain files that were used to post

process the air quality modeling data and calculate future year projections of air quality 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 M odeling Technical Support Document that is located in the Transport Rule docket.

The CD contain s output data files f rom the Model ed Attainment Test Software (MATS) runs that were completed for the purposes of calculating future year ozone and PM 2.5 des ign values

, as well as spatial fields that were used to develop inputs to BenMAP for benefits calculations 1

. The CD contains the following subdirectories:

Ambient data for MATS

- Contains the ambient data files used as inputs to MATS. These are updated from the ambient data files contained in the current official release version of MATS. These files were used in all of the final Transport Rule MATS runs.

Annual PM Design Value

- MATS outputs for the annual PM2.5 design value calculations for each CAMx scenario.

Annual PM Spatial

- MATS outputs for the annual PM2.5 spatial fields used to create BenMAP inputs.

Daily PM Code and New 24

- hour attainment test output f iles

- This subdirectory contains additional post

- processing code that was used to apply the revised 24

- hr PM2.5 attainment test. MATS outputs from the 24

- hr attainment test were further post

processed using SAS to create revised design values. The SAS code is contained in the subdirectory. There are also additional summary output files that ar e created by the SAS code.

Daily PM Design Value

- MATS outputs for the 24 hour PM2.5 design value calculations for each CAMx scenario.

NOx Analyses

- MATS outputs from the Georgia zero

- out MATS runs used in support of the NOx analyses. Also supporting sp readsheets of calculated changes in PM species and nitrate replacement for the “Technical Analyses in Support of the Need for Annual NOx Controls in the Final Transport Rule”.

1 Note that all of the MATS input files developed from CAMx and the MATS outputs for the 2012cs_o3tag and 2012cs_pmtag runs (used to calculate contributions) are contained on separate data drives

. They are a separate ent ry in the Transport Rule docket.2

Ozone Design Value

- MATS outputs for the ozone design value calculations for ea ch CAMx scenario.

Seasonal Ozone Spatial

- MATS outputs for the seasonal average ozone spatial fields used to create BenMAP inputs.

Visibility

- MATS outputs for the regional haze related visibility calculations on the 20% best and 20% worst visibility day s.

Visibility Benefits

- MATS outputs used to calculate annual average visibility for the benefits calculations.

Within each subdirectory that contains MATS outputs are additional subdirectories for each modeling scenario. Table 1 lists the MATS modeling scenarios that are contained on the CD. There is a MATS run for each set of average design values calculated. There

are three additional MATS runs for each maximum design value calculated (the maximum future value is selec ted from the three MATS runs). MATS was also used to generate annual average PM2.5 spatial fields and seasonal average ozone spatial fields for the 2014 base case and 2014 remedy case that were used to generate BenMAP inputs (see the RIA for more details)

.

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

Scenario Description MATS Runs ( 12km Eastern domain unless otherwise noted )

2012cs 2012 base case Ozone design values

- average and max Annual PM2.5 design values

- average and max 24 hour PM2.5 design values

- average and max

2014cs 2014 base case Ozone design values

- average and max Annual PM2.5 design values

- average and max 24 hour PM2.5 design values

- average and max Annual PM2.5 spatial fields (12km and 36km) Seasonal average ozone spatial fields (12km and 36km) Visibility (12km and 36km)

2014cs_tr1remedy 2014 "Air Quality

Assur ed Trading" scenario (remedy case) Ozone design values

- average and max

Annual PM2.5 design values

- average and max 24 hour PM2.5 design valu es

- average and max Annual PM2.5 spatial fields (12km and 36km) Seasonal average ozone Visibility (12km and 36km)

2014cs_noxsox 2014 Air Quality

Assessment Tool (AQAT) calibration scenario Ozone design values

- average and max

Annual PM2.5 design values

- average and max 24 hour PM2.5 design values

- average and max3

Scenario Description MATS Runs ( 12km Eastern domain unless otherwise noted )

2014cs_sox Sens i tivity run with

EGU SO2 emissions from AQAT calibration scenario and EGU NOx and all other emissions from the 2014 base case Annual PM2.5 design values

- average

24 hour PM2.5 design values

- average

2014cs_GA_nox Sens i tivity run with

all anthropogenic NOx emissions removed (zero

- out) in the state of Georgia; emissions for other pollutants from 2014 base case Annual PM2.5 design values

- average

24 hour PM2.5 design values

- average

The total volume of data is approximately 1.9G B

. EPA will respond to specific requests for subsets of the data or specific additional inputs and outputs of the modeling process , d epending on the availability of th os e data

. Requests for electronic copies of Transport Rule air quality modeling data should be sent to Norm Possiel ( possiel.norm@epa.gov ) and Brian Timin ( timin.brian@epa.gov )

.