EPA Science Inventory

Evaluating Potential Exposures to Ecological Receptors Due to Transport of Hydrophobic Organic Contaminants in Subsurface Systems (Final Report)

Notice:

The Ecological Risk Assessment Support Center (ERASC) announces the release of the final report, Evaluating Potential Exposures to Ecological Receptors Due to Transport of Hydrophobic Organic Contaminants in Subsurface Systems.

Citation:

Ford, R., M. Brooks, C. Enfield, AND M. Kravitz. Evaluating Potential Exposures to Ecological Receptors Due to Transport of Hydrophobic Organic Contaminants in Subsurface Systems (Final Report). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-10/015, 2014.

Description:

This technical paper recommends several types of screening assessments to evaluate site conditions for the potential to enhance transport of HOCs, as well as site artifacts that result from inadequate well installation and sampling procedures within a ground-water monitoring network. These assessments are incorporated into a suggested three-tiered decision analysis process that attempts to address all potential mechanisms that can result in HOC transport to surface water. For sites in which a complete exposure pathway exists from ground water to surface water, we summarize a process for using HOC exposure information to estimate risks to ecological receptors.

Purpose/Objective:

This report was written in response to a request from EPA’s Ecological Risk Assessment Forum (ERAF) relating to the mechanisms by which hydrophobic organic contaminants (HOCs) may be transported to groundwater and downgradient media, and how these mechanisms affect exposures, bioaccumulation and toxic effects on ecological receptors. This technical paper recommends several types of screening assessments to evaluate site conditions for the potential to enhance transport of HOCs, as well as site artifacts that result from inadequate well installation and sampling procedures within a ground-water monitoring network. These assessments are incorporated into a suggested three-tiered decision analysis process that attempts to address all potential mechanisms that can result in HOC transport to surface water. For sites in which a complete exposure pathway exists from ground water to surface water, we summarize a process for using HOC exposure information to estimate risks to ecological receptors.

URLs/Downloads:

Evaluating Potential Exposures to Ecological Receptors Due to Transport of Hydrophobic Organic Contaminants in Subsurface Systems (Final Report)   (PDF,69 pp, 2284 KB,  about PDF)

U.S. EPA’s Ecological Risk Assessment Support Center (ERASC)

Record Details:

Record Type: DOCUMENT (ASSESSMENT DOCUMENT)
Start Date: 06/30/2014
Completion Date: 06/30/2014
Record Last Revised: 01/28/2015
Record Created: 02/23/2010
Record Released: 06/30/2014
OMB Category: Other
Record ID: 219928

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL CENTER FOR ENVIRONMENTAL ASSESSMENT

CINCINNATI OH