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# Emissions Modeling Clearinghouse

The Emissions Modeling Clearinghouse (EMCH) has bee n designed to support and promote emission modeling activities both internal and exte rnal to EPA. Through this site the EPA intends to distribute emissions model input formatt ed inventories based on the latest versions of its National Emission Inventory databas es. In addition to the emissions data, this site will be used to document and distribute the Ag ency's latest versions of the ancillary files used to support the temporal, spatial, speciation, and projection of these emissions. Although numerous links to other sources of emissions, model ing factors, and emissions models are available through this site, the EPA does not activ ely support the use of any one inventory, set of factors, or emissions models for input devel opment to air quality modeling.



## 2005-Based Modeling Platform

This platform includes emissions data and tools tha t are in development for supporting future EPA analyses. This platform will include support of both criteria air pollutants (CAPs), mercury, and other hazardous air pollutants (HAPs) to prepare emissions for air quality models. Currently, this platform contains emissions for all inventory HAPs, but does not contain the input ancillary files for processing HA Ps with the following exceptions: mercury, HCl, Cl, and “BAFM” (Benzene, Acetaldehyde, Formald ehyde, and Methanol). SMOKE scripts and emissions summaries will be made available at a later date.

Disclaimer: The data available at this time are not necessarily the final data for the 2005-based platform. EPA may choose to create anoth er version of the 2005 platform at a later time, without notice.


### CAP-BAFM 2005-Based Platform, Version 4 Documentation (in progress) will be provided at a l ater date Data Files (last updated 07/07/2009) 2005 NEI, version 2 for CAPs and HAPs in SMOKE inpu t format All emissions modeling ancillary data files for bas e - year CAP processing that Site Directory 2005 Based Modeling Platform 2002 Based Modeling Platform 2001 Based Modeling Platform Emissions modeling software tools Emissions modeling ancillary data (Non-inventory data) Related Links to Emissions Modeling Resources 

## Technology Transfer Network Clearinghouse for Inventories & Emissions Factors Last updated on Monday, November 23rd, 2009. http://www.epa.gov/ttn/chief/emch/index.html 

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1/12/2010 http://www.epa.gov/ttn/chief/emch/index.htmlwork with the 2005 v2 NEI, excluding meteorology da ta. These files are provided in SMOKE-ready format only at this time Future year scenarios may be provided at a later da te Microsoft® Excel® summary files (in progress) will be provided at a later date Custom SMOKE run scripts (in progress) will be prov ided at a later date 

## 2002-Based Modeling Platform

This platform includes emissions data and tools tha t are in development for supporting future EPA analyses. This platform will include support of both criteria air pollutants (CAPs), mercury, and other hazardous air pollutants (HAPs) to prepare emissions for air quality models.

Disclaimer: The data available at this time are not necessarily the final data for the 2002-based platform. EPA may choose to create anoth er version of the 2002 platform at a later time, without notice.


### CAP 2002-Based Platform, Version 3
Documentation Technical Support Document: Preparation of Emissions Invento ries for the 2002

- Based Platform, Version 3, Criteria Air Pollutants (PDF 77 pp., 0.93MB) Appendices for Technical Support Document: Preparation of Emi ssions Inventories for the 2002

- Based Platform, Version 3, Criteria Air Pollutants (PDF 142 pp., 0.97MB) EGU Temporal Allocation approach (PDF 14kb) Data Files (last updated 1/17/2008) 2002 NEI, version 3 for CAPs in SMOKE input format All emissions modeling ancillary data files for bas e-year CAP processing that work with the 2002 v3 NEI, excluding meteorology da ta. These files are provided in SMOKE-ready format only at this time 2009, 2014, 2020 and 2030 emissions data

Microsoft Excel summary files with both 2002 and future years included Custom SMOKE run scripts
At this location, we also plan to post the followin g additional information:
Emissions modeling ancillary files in CSV format
We also plan to post additional future-year data fo r 2009 and 2014, but a schedule has not yet been set for these.


### Mercury-only 2002-Based Platform, Version 3 Documentation (in progress) Data Files (last updated 1/17/2008) CAP NEI files are the same as the CAP-only platform and should be obtained from the CAP 2002-Based Platform, Version 3 describ ed above. 2002NEI, version 3 for mercury, chlorine, and hydro chloric acid (HCI) in SMOKE "ORL" input format. These are the polluntants neede d for supporting mercury modeling with the current version of the CMAQ model

. There are no additional ancillary files for this ca se. All ancillary files to process these emissions should be obtained from the CAP and HAP 2002-Based Platform, Version 3, described below. 

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### CAP and HAP 2002-Based Platform, Version 3
Documentation The 2002-Based Multi-Pollutant Modeling Platform Re port, Volume III: Air Toxics (PDF 676KB) Appendices (PDF 680KB) Data Files (last updated 1/17/2008) CAP NEI files are the same as the CAP-only platform and should be obtained from the link above 2002 NEI, version 3 for HAPs All 2002 SMOKE ancillary data files for base-year C AP-HAP needed in addition to the files provided with the CAP-only platform, excl uding meteorology data. Custom SMOKE run scripts 

## 2001-Based Modeling Platform

The 2001 modeling platform includes emissions data (but not tools) that were used for previous EPA analyses, as listed below for each pla tform. Version 2 of this platform supports only CAP emissions, while Version 1 supports both C APS and mercury.


### CAP 2001-Based Platform, Version 2

Includes 2001 and future baseline emissions data us ed for the EPA analyses shown below. These data files generally do not include rule-spec ific emissions files for rule-specific base case runs or control strategies. The complete list of rules and RIAs using this version of the platform is:

- Regulatory Impact Analysis for Final PM NAAQS - Regulatory Impact Analysis for Proposed 03 NAAQS - Locomotive Marine Rule Proposal (EPA Of fice of Transportation and Air Quality) - Analysis of Clean Diesel programs (EPA Office of Transportation and Air Quality) - Section 753 Report of the 2005 Energy P olicy Act.

Documentation This platform has been documented in Chapters 1 and 2 of the PM NAAQS Regulatory Impact Assessment, which is available online at http://www.epa.gpv/ttn/ecas/ria.html. Data Files (last updated July 2007) 2001 NEI for CAPs in SMOKE "IDA" input format All emissions modeling ancillary data files for bas e-year CAP processing that work with the 2001 NEI, excluding meteorology data. These files are provided in SMOKE-ready format only at this time. 2015 and 2020 inventories in SMOKE "IDA" input form at. Data Files in support of 03 NAAQS Proposal RIA 2020 Base Case inventory data files specific to 03 NAAQS Proposal RIA


### CAP and Hg 2001-Based Platform, Version 1

Includes 2001 and future baseline emissions as well as SMOKE ancillary data. These data were used for the following analyses. - Clean Air Interstate Rule (CAIR) - Clean Air Mercury Rule (CAMR) - Clean Air Visibility Rule (CAVR), commo nly known as the "BART" rule - Clear Skies Legislation analysis - Control of Emissions from Onroad Spark- Ignition Engines and Equipment, Proposed 

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1/12/2010 http://www.epa.gov/ttn/chief/emch/index.htmlRule (EPA Office of Transportation and Air Quality)

Documentation The CAP part of this platform has been documented i n the CAIR Emissions Inventory Technical Support Document The Mercury part of this platform has been document ed in the CAMR Emissions Inventory TSD , called Emissions Inventory and Emissions Processi ng for the Clean Air Mercury Rule. Data Files: The data files for the CAP part of the platform are available using a passwordprotected FTP site, Login and password can be obtai ned from Peter Eckhoff at eckhoff.peter@epa.gov. Mercury data , based on 1999 National Emission Inventory. 

## Emissions Modeling Ancillary Data Latest release ancillary files Smoke format CSV format Fugitive Dust Fractions Temporal Allocation of Emissions Spatial Allocation of Emissions Chemical Speciation of Emissions Emission Projections Biogenic Emissions 

## Related Links to Emissions Modeling Resources

Training Course - Preparation of Emission Inventories for Modeling
Community Modeling and Analysis System (CMAS) Center
The Modeling and Analysis System (CMAS) is an appro ach for supporting community-based air quality modeling. The CMAS Cent er distributes and supports features of VMAS for the global modeling c ommunity. Its activities include an on-line help desk, model clearinghouse, training, conferences, development assistance for adding new features for the supported CMAS prodicts, model documentation access, model-related research, and a data clearinghouse.

Sparse Matrix Operator Kernel Emissions (SMOKE) modeling system
Emissions modeling system used by EPA to prepare em issions for input to various air quality models. Includes the BEIS3.13 biogenic emissins model.
Emissions Modeling System (EMS), 2001
Emissions modeling system for preparation of emissi on inventory data from National Inventory Format (NIF) 3.0 for input to ai r quaity models. Includes the BIOME3 biogenic emissions.
Consolidated Community Emissions Processing Tool (CONCEPT)
The new and open source CONCEPT Emissions Processor is under development to support the development of State Implementation Pla ns for fine particles, regional haze, and ozone by state and local agencies. 

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1/12/2010 http://www.epa.gov/ttn/chief/emch/index.htmlHourly Continuous Emissions Monitoring (CEM) data in SMOK E

- ready format.

This site contains hourly CEM data prepared for SMO KE version 2.3 and later for all available CEM data. 

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