Recent Additions

Jan 13, 2009

Jan 12, 2009

A new, multipollutant version (4.3) of the APEX model is now available. The new files can be downloaded from the TRIM.Expo_Inhalation download page.

Aug 16, 2007

An updated version (4.02) of the APEX model is now available, correcting a number of bugs in version 4.01 (dated 6/7/06). The new files can be downloaded from the TRIM.Expo_Inhalation download page.

Aug 7, 2007

A version of TRIM.Risk for probabilistic exposure response functions (TRIM.RiskHuman Health-Probabilistic) has been developed and applied in the 2007 ozone NAAQS risk assessment. Although this version is not yet available in generic form for easy use in other applications, the version used in the 2007 ozone NAAQS risk assessment is available and is described in the application user's guide on the TRIM.Risk Download page.
The analyses performed as part of the 2007 ozone exposure, risk and impact assessments for vegetation are now available, with accompanying documentation.

May 24, 2007

EPA has updated the HEM3 model to Version 1.1.0. The new version includes the ability to run both the ISCST3 and AERMOD air dispersion models. Updated census and meteorological data and a revised users guide are also provided.

May 25, 2006

Volume 3 - "Community Scale Assessment" - of the Air Toxics Risk Assessment (ATRA) Reference Library is now available. This volume builds on ATRA Volume 1 to describe how to evaluate and reduce cumulative air toxics risks at the local level; it also discusses other risk factors that may affect communities, and strategies to reduce those risks.

May 23, 2006

A link has been added to provide access to implementation material regarding the Agency's Cancer Risk Assessment Guidelines on the Links to EPA Risk Assessment Policy, Guidelines, and Related Materials page.

May 12, 2006

A correction has been made to HEM-Screen, version 2003, beta and the corrected model has been posted on the HEM Download page. The error, discovered in March 2006, was associated with its use with 20 counties in Illinois and a single county in Oregon and Oklahoma.

April 6, 2006

The TRIM.FaTE User's Guide module on "Operation of TRIM.FaTE in Steady State Mode" has been updated.

March 15, 2006

Additional TRIM example applications for training purposes have been posted. These applications involve multiple chemicals and are posted on the TRIM.Risk and TRIM.Expo_Inhalation download pages.

December 30, 2005

The main link to the HEM General page has been moved from the FERA home page to the Risk – Air Toxics page. The address for the HEM page is unchanged (http://www.epa.gov/ttn/fera/human_hem.html), and it is still also accessible from the HEM Download page.
TRIM.Risk is now available, with information provided on the updated TRIM. Risk page, and the model and associated files provided on the new TRIM.Risk Download page. This new release is accompanied by changes to all of the TRIM related FERA pages. These changes include a new TRIM installation program on the TRIM Installation page to facilitate installing TRIM programs, as well as the inclusion of several example applications for training purposes.
APEX 4.0 and the APEX 4.0 user’s guide are now available.
An updated version of the TRIM.FaTE Public Reference Library that includes dioxins and an updated version of the TRIM.FaTE model are now available.

August 26, 2005

August 3, 2005

An updated version of HAPEM (HAPEM5) has bee placed on the HAPEM download page. Documentation for HAPEM5 has been placed on the HAPEM page.

June 6, 2005

June 2, 2005

An updated version of TRIM.FaTE has been placed on the TRIM.FaTE Download page. This version corrects a bug regarding MySQL usage.
Volume III of the TRIM.FaTE Evaluation Report (Model comparison Focusing on Dioxin Test Case) has been posted on the TRIM.FaTE page.
An updated version (v1.0.1g) of the HEM-3 model and updated toxicity files have been posted on the HEM download page. An updated HEM-3 user's guide is also available on the HEM page. Additionally, meteorological files have been posted for 7 additional cities on the Met Data page.