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Software Tools Available from the EPA Emission Factor and Inventory Group

Software Descriptions
The U. S. Environmental Protection Agency (EPA) Emission Factor And Inventory Group (EFIG) develops air emission factor and inventory software tools for both point and area sources. These tools support activities such as Clean Air Act requirements, State Implementation Plans (SIP), SARA 313 reporting requirements, and other emission estimating and assessment activities. The most popular software items provided by EPA's Emission Factor and Inventory Group include the Factor Information Retrieval (FIRE) database, the TANKS database, and the Air CHIEF CD-ROM. Please visit the individual web pages for more information on these products.  Access to download the softare can be found out: http://www.epa.gov/ttn/chief/software.html

Fugitive Dust Emissions Estimation

MECH is a computer program which estimates particulate emissions from paved roads, unpaved roads, materials handling, agricultural tilling and construction & demolition operations. This program automates the calulation routines contained in the document "Control of Open Fugitive Dust Sources" EPA 450/3-88-008. The WIND program, referred to in the MECH manual, was removed because the information in the program is out of date.

Landfill Air Emissions Estimation Model

This model was developed by the Clean Air Technology Center (CATC). The Landfill Air Emissions Estimation Model can be used to estimate emission rates for methane, carbon dioxide, nonmethane organic compounds, and individual toxic air pollutants from landfills. The program can also be used by landfill owners and operators to determine if a landfill is subject to the control requirements of the federal New Source Performance Standard (NSPS) for new municipal solid waste (MSW) landfills (40 CFR 60 Subpart WWW) or the emission guidelines for existing MSW landfills (40 CFR 60 Subpart Cc).
The Landfill Air Emissions Estimation Model is available from the Clean Air Technology Center (CATC) Website.


The Personal Computer version of the Biogenic Emissions Inventory System (BEIS2.3) allows users to estimate hourly emissions of biogenic volatile organic compound and soil nitrogen oxide emissions for any county in the contiguous United States. This system was developed by US EPA's Office of Research and Development via collaboration between the National Risk Management Research Laboratory, Emissions and Modeling Branch and the National Exposure Research Laboratory, Atmospheric Modeling Division. BEIS2.3 has been written in C++/JAVA to allow better operability with current PC operating systems and to take advantage of more recent approaches in object-oriented programming. BEIS2.3 uses the same emission factors and land use data as PCBEIS2.2 and should produce very similar results.

PM Calculator Program

EPA has replaced the PM-10 Calculator program with new software that will estimate Filterable PM2.5 emissions. The new software, PM Calc is applicable to point sources only and requires the user to input uncontrolled emissions (either total filterable particulate or filterable PM10) for each source, the source category classification (SCC) and the control device, if any. The program will then calculate controlled emissions for filterable PM2.5 and filterable PM10 for each point source.


SPECIATE is EPA's respository of Total Organic Compound (TOC) and Particulate Matter (PM) speciated profiles for a variety of sources for use in source apportionment studies. This release of SPECIATE no longer contains profiles assigned to SCC's. Instead, searching for profiles by keyword has been improved and of course the user can still browse through the profiles. Some additional improvements have been made to the interface, and some minor bugs associated with the export feature have been fixed. No new profiles have been added to SPECIATE since the previous release in October, 1999.

SPECIATE 3.1 is a 32-bit program that can run under Windows 95/98 or Windows NT. The single file install version .exe file is a self-extracting 3 MB file. A 3-floppy disk image version is also available below. The extracted files will require 10.1 MB of hard disk space.


CHEM9 is a compound properties processor that is based upon an EPA compound database of over 1000 compounds. It provides the capability to estimate compound properties that are not available in the database, including the compound volatility and the theoretical recovery (fraction measured (Fm)) for EPA test methods 25D and 305. Fraction emitted (Fe) and fraction removed in a steam stripper (Fr) values that are not in the database can also be estimated using the CHEM9. Contact the CHEM9 hotline at (919) 541-5610 for more information.


WATER8 is an analytical model for estimating compound-specific air emissions from wastewater collection & treatment systems.

CHEMDAT8 is a Lotus 1-2-3 spreadsheet that includes analytical models for estimating VOC emissions from treatment, storage and disposal facility (TSDF) processes. Contact the WATER8 and CHEMDAT8 hotline at(919) 541-5610 for more information.

For current activities of the Emission Factor and Inventory Group, subscribe to the CHIEF Listserver.
You can also contact the Info CHIEF help desk,

Phone: (919) 541-1000,
Fax: (919) 541-5680

Mailing Address:
Emission Factor And Inventory Group (MD-14)
Office of Air Quality Planning and Standards
U. S. Environmental Protection Agency
Research Triangle Park, NC 27711

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