Science & Technology
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Methodology Document for RSEI Model Version 2.1.2, August 2004
This methodology document accompanies version 2.1.2 of the Risk-Screening Environmental Indicators model.
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RSEI Version 2.1 Distribution Package
Information distributed to users in technical release of RSEI Version 2.1
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Estimate of Stack Heights and Exit Gas Velocities for TRI Facilities in OPPT's Risk-Screening Environmental Indicators Model, June 1999
This document describes the methods used to estimate stack heights and exit gas velocities for TRI facilities
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TRI Relative Risk-Based Environmental Indicators Methodology, June 1997
This report explains how the proposed Indicators are constructed, and includes discussions of the conceptual methodology, data sources, and the computational approach.
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Joint US EPA ASPECT and 64th CST Chemical and Radiological Field Exercise Report
This report covers a joint chemical and radiological field training exercise using EPA's ASPECT.
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User's Manual for OPPT's Risk-Screening Environmental Indicators Model: Version 1.0, November 1999
This manual describes the Indicator methodology, operations of the computer model and the step-by-step processes to perform them, and pre-run queries available with the model.
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User's Manual for RSEI Model Version 2.1, December 2002
This manual accompanies version 2.1 of the Risk-Screening Environmental Indicators model.
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User's Manual for RSEI Model Version 2.1.2, August 2004
This manual accompanies version 2.1.2 of the Risk-Screening Environmental Indicators model.
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User's Manual for RSEI Model Version 2.1.5, September 2007
This manual accompanies version 2.1.5 of the Risk-Screening Environmental Indicators model
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Analyses Performed for the Risk-Screening Environmental Indicators
Describes analyses performed as part of the Risk-Screening Environmental Indicators screening tool
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TRI Relative Risk-Based Environmental Indicators: Summary of Comments Received on the Draft 1992 Methodology and Responses to Comment, May 1997
This document contains general comments on the original Indicators methodology, the toxicity weighting, the chronic ecological indicator and other issues. OPPT's responses and proposed changes are also discussed.
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Regional SDAMs FAQs
Answers to some of the most frequently asked questions about Regional SDAMs and how to apply them in the field are listed.
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Sample Collection Information Documents (SCID)
Individuals responsible for collecting samples following an environmental contamination incident, can use this information to collect samples for analysis using the analytical methods listed in EPA's SAM
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Safety Practices for On-Farm Anaerobic Digestion Systems
This document helps identify the major hazards associated with an AD facility and outline basic practices that will help maintain a safe and successful working environment.
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Using Biochemical Methane Potentials and Anaerobic Toxicity Assays
Presentation by Lara Moody, Iowa State University, at the Fifth AgSTAR National Conference, regarding using biochemical methane potential (BMP) and anaerobic toxicity assays (ATA).
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Attracting Institutional and Impact Investors
A power point presentation detailing the process to attract strong investors in the domestic wastewater market
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Programmatic Information on Numeric Nutrient Water Quality Criteria
An overview of what EPA is doing to combat the nitrogen and phosphorus pollution problems in the U.S.
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Research and Reports on Nutrient Pollution
Research and Reports on Nutrient Pollution
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EPA Collaboration to Validate Satellite Air Quality Measurements
EPA scientists measured a combination of pollutants and meteorological variables across the Long Island Sound region as part of a multi-agency research campaign involving the NASA, NOAA, and state partners.
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Regulatory Determinations for Pollutants in Biosolids
Information on the regulatory determinations for pollutants found in biosolids and the limits associated with those pollutants.