| Title: |
Evaluating Ground-Water/Surface-Water Transition Zones in Ecological Risk Assessments
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| Resource Type: |
document --> public information
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| Country: |
USA
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| Year: |
2008 |
| Availability: |
Joint Document of the Ecological Risk Assessment Forum and the Ground Water Forum Publication 9285.6-17 EPA-540-R-06-072 July 2008
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| Author 1/Producer: |
US Environmental Protection Agency (US EPA)
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| Author / Producer Type: |
Agency, regulator or other governmental or inter-governmental body
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| Format (e.g. PDF): |
PDF
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| Size: (e.g. 20mb) |
1
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EUGRIS Keyword(s): |
Sediments
Water resources and their management -->River basins
Water resources and their management -->Stresses, quality and ecological status
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| Short description: |
his document highlights the
need to treat the discharge of groundwater to surface-water not
as a two-dimensional area with static boundary conditions, but
as three-dimensional volumes with dynamic transition zones. This
ECO Update applies equally to recharge zones and can be used to
evaluate advancing plumes that have not yet reached the
transition zone. This document encourages project managers,
ecological risk assessors, and hydrogeologists to expand their
focus beyond shoreline wells and surface sediments and define
and characterize the actual fate of contaminants as they move
from a strictly ground-water environment (i.e., the commonly
used 'upland monitoring well nearest the shoreline') through the
transition zone and into a wholly surface-water environment. The
approach is presented to help users identify and evaluate
potential exposures and effects to relevant ecological receptors
within the zone where ground-water and surface-water mix. The
transition zone data collected for the ERA may also supplement
data collected for the evaluation of potential human health
risks associated with the discharge of contaminated
ground-water. Should ground-water remediation be warranted (as a
result of the risk assessment), the locational, geochemical, and
biological aspects of the transition zone can be considered when
identifying and evaluating remedial options
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Submitted By:
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Professor Paul Bardos WhoDoesWhat?
Last update: 04/12/2008
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