Science & Technology
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Example Calculations of Preliminary Remediation Goals for Benzo[a]pyrene Using Age-Dependent Adjustment Factors, Draft
Example preliminary remediation goal (PRG) calculations for exposure to benzo[a]pyrene in soil and water by ingestion using age-dependent adjustment factors (ADAFs)
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OSWER Directive 9200.1-120
Update of Standard Default Exposure Factors issued by EPA's Office of Solid Waste and Emergency Response, know referred to as the Office of Land and Emergency Management (OLEM).
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Tier 3 Toxicity Value White Paper
The purpose of this white paper is to articulate the issues pertaining to Tier 3 toxicity values and provide recommendations on processes that will improve the transparency and consistency of identifying, evaluating, selecting, and documenting Tier 3 toxicity values for use in the Superfund and Resource Conservation and Recovery Act (RCRA) programs. This white paper will be used to assist regional risk assessors in selecting Tier 3 toxicity values as well as provide the foundation for future regional and national efforts to improve guidance and policy on Tier 3 toxicity values.
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Presenter's Manual for Superfund Risk Assessment and How You Can Help
This manual was prepared to guide EPA staff during public presentations of the 40-minute videotape.
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Ecotox Thresholds
The ecological risk assessments (ERAs) performed in the superfund program often include a procedure to determine which, if any, of the contaminants found at a site are present
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Role of the Ecological Risk Assessment in the Baseline Risk Assessment
I want to emphasize the importance of selecting remedies at Superfund sites that are protective of the environment as well as human health.
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Human Health Toxicity Values in Superfund Risk Assessments
This memorandum revises the hierarchy of human health toxicity values generally recommended for use in risk assessments, originally presented in Risk Assessment Guidance for Superfund Volume I, Part A.
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Region and ORD Workshop on Inhalation Risk Assessment A Superfund focus
Each year, EPA Regions identify high priority science topics on which to conduct workshops. The workshops address the science issues of greatest interest to the regions on the selected topic areas.
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Ecotox Thresholds 1996
This bulletin provides an overview of the development and use of Ecotox Threshold (ET) benchmark values in Superfund ecological risk assessments (ERAs)
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Guidance for Comparing Background and Chemical Concentrations in Soil for CERCLA Sites
Guidance for Comparing Background and Chemical Concentrations in Soil for CERCLA Sites - EPA 540-R-01-003, OSWER 9285.7-41, September 2002
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Memorandum: Tier 3 Toxicity Value White Paper - June 19, 2013
The purpose of this memorandum is to transmit the OSRTI Document entitled "Tier 3 Toxicity Value White Paper
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Non-Dioxin-Like PCBs: Effects and Consideration In Ecological Risk Assessment
An estimated one million metric tons of commercial mixtures of polychlorinated biphenyls (PCBs), such as Aroclors (USA), Kanechlors (Japan) and Clophens (Germany), were manufactured (WHO, 1993) and used worldwide as dielectric fluids
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Transmittal of Interim Bulletin Volume 1, Number 1 "Supplemental Guidance to RAGS: Calculating the Concentration Term", June 22, 1992
A quality action team (QAT) was initiated at the annual Superfund Risk Assessment Meeting in March, 1991, specifically to address the problem of calculating the concentration term for use in Superfund exposure assessment.
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Transmittal of Policy Statement: "Role of Background in the CERCLA cleanup program"
Draft versions of this policy were distributed for internal review and comment in January 2001 and August 2001.
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Guidance for Data Useability in Risk Assessment (Part B-6), Final, May, 1992
This chapter discusses the application of radioanalytical data for risk assessment. Guidance is provided for reviewing data for consistency and completeness
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Section 3 - Exposure assessment and risk descriptors
The results of a risk assessment are usually communicated to the risk manager in the risk characterization portion of the assessment.
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EPA Science Matters Newsletter: Helping an Ally, and Learning from Disaster
EPA homeland security research helps Japan in the aftermath of the devastating earthquake, tsunami, and radiation leak.
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EPA Science Matters Newsletter: MCnest: Not Just for the Birds (Published January 2014)
Learn about the Markov Chain Nest Productivity Model (MCnest), a model that estimates the potential impact of pesticide exposures on the reproductive success of bird populations.
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Sourcing Urban Soil Contaminants to Improve Cleanup
A science matters story on Urban background contaminants
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EPA Researchers Share Lessons Learned from Citizen Science Research Projects
FAQs about citizen science EHAs