Science & Technology
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Greener Cleanups
OLEM’s goal is to reduce the environmental footprint of cleanup activities at contaminated sites to the maximum extent possible. This website shares policies, tools and practices to achieve that goal across cleanup programs.
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Air Quality and Climate - CMAQ
Climate
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Guide to Selected Algorithms, Distributions, and Databases Used in Exposure Models Developed By the Office of Air Quality Planning and Standards
In the evaluation of emissions standards, OAQPS frequently uses one or more computer-based models to estimate the number of people who will be exposed to the air pollution levels that are expected to occur under various air quality scenarios.
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Ozone Health Risk Assessment for Selected Urban Areas
The health risk assessment described in this report estimated various health effects associated with O3 exposures as well as the reduced risks for one O3 season associated with just meeting the current O3 NAAQS.
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Hazardous Air Pollutant Exposure Model (HAPEM) Versions
The HAPEM model has been designed to estimate inhalation exposure for selected population groups to various air toxics.
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Human Exposure Assessment and Modeling - Criteria Air Pollutant Exposure Assessment
Summaries of exposure assessments performed for criteria air pollutants in the context of NAAQS reviews.
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Risk Assessment and Modeling - Overview
Risk characterization as a description of the nature and magnitude of human or ecological risk and the attendant uncertainties.
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Human Exposure Modeling - Overview
Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.
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Total Risk Integrated Methodology (TRIM) - TRIM.Risk
TRIM.Riskis used to integrate the information on exposure received from TRIM.FaTE or TRIM.Expo with that on dose-response or hazard assessment and to provide quantitative descriptions of risk or hazard and some of the attendant uncertainties.
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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.
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TRIM.FaTE Technical Support Document
Total Risk Integrated Methodology. TRIM.FaTE Technical Support Document.
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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.
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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.
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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.
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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.
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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).
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Supporting documentation for TRIM.Risk
Supporting documentation for the model, TRIM.Risk
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TRIM.FaTE User's Guide
FERA TRIM.FaTE User's Guide
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TRIM Historical Documents
TRIM.FaTE Historical Documents
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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.