Science & Technology

Ecological Significance and Selection of Candidate Assessment Endpoints

This bulletin provides guidance to Superfund risk assessors and risk managers on planning ecological risk assessments (ERAs) at Superfund sites.

Region 8 Superfund Technical Guidance: Evaluating and Identifying Contaminants of Concern for Human Health

Regional guidance intended to clarify the evaluation process for selecting contaminants of concern for the human health risk baseline risk assessment process at Superfund sites. Sep. 1994

Example RAGS D Tables for Chemicals with a Mutagenic Mode of Action for Carcinogenicity (Revision 2.0, December 2007)

Example RAGS D tables for chemicals with a mutagenic mode of action for carcinogenicity

Example Calculations of Preliminary Remediation Goals (PRGs) for Benzidene Across Multiple Exposure Pathways Using Age-Dependent Adjustment Factors, Draft (Revision 1.0, December 2007)

Example preliminary remediation goal (PRG) calculations for exposure to benzidene in soil and water by both the ingestion and dermal exposure pathways using age-dependent adjustment factors (ADAFs)

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)

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).

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.

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.

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

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.

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.

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.

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)

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

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

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

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.