Science & Technology

Total Risk Integrated Methodology (TRIM) - TRIM.Expo

The Exposure Event module of TRIM (TRIM.Expo), similar to most human exposure models, provides an analysis of the relationships between various chemical concentrations in the environment and exposure levels of humans.

TRIM.FaTE Technical Support Document

Total Risk Integrated Methodology. TRIM.FaTE Technical Support Document.

TRIM.Risk User's Guide Volumes 1 - 3 and Data Analysis and Visualization Engine (DAVE) User’s Guide

TRIM.Risk is a collection of tools used for the characterization of human health and ecological risk.

Residual Risk Report to Congress 1999

This report is a description of the methods and general framework that EPA uses to assess the public health and environmental risk which may remain after implementation of air toxics emissions standards required under section 112(d) of the Clean Air Act.

Air Toxics Risk Assessment Reference Library Volumes 1 - 3

Risk characterization as a description of the nature and magnitude of human or ecological risk and the attendant uncertainties.

Steps Required to Set Up the “HAPEM (1 chem)” Example Application

The HAPEM model has been designed to estimate inhalation exposure for selected population groups to various air toxics.

General Description and Conceptual Plan for TRIM.Risk, from TRIM Total Risk Integrated Methodology Status Report, 1999

The purpose of this report is to provide a summary of the status of TRIM and all of its major components, with particular focus on the progress in TRIM development since the 1998 TRIM Status Report (US EPA, 1998).

Supporting documentation for TRIM.Risk

Supporting documentation for the model, TRIM.Risk

TRIM.FaTE User's Guide

FERA TRIM.FaTE User's Guide

TRIM Historical Documents

TRIM.FaTE Historical Documents

Users Guide for TRIM.Risk Human Health-Probabilistic Application for the Ozone NAAQS Risk Assessment

The Total Risk Integrated Methodology (TRIM) is a time-series modeling system with multimedia capabilities for assessing human health and ecological risks from hazardous and criteria air pollutants.

Water Quality Standards Regulations: Tennessee

Information related to Water Quality Standards for Tennessee.

Human Exposure Modeling - Reports Describing the Methodology and Applications of the Probabilistic NAAQS Exposure Model

Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.

Fate, Exposure and Risk Models Download

The technical tools found on this technical air resources website will assist with efforts to evaluate the health risks and environmental effects associated with exposure to specific air pollutants.

Exceptional Events Documents Particulate Matter - Kennewick, WA

Exceptional Events Documents Ozone - Kennewick, WA

Clarification Memo on Additional Methods, Determinations, and Analyses to Modify Air Quality Data Beyond Exceptional Events

Additional Methods Determinations