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TechDirect's purpose is to identify new technical, policy and
guidance resources related to the assessment and remediation of
contaminated soil, sediments and ground water.
Mention of non-EPA documents or presentations does not
constitute a U.S. EPA endorsement of their contents, only an
acknowledgment that they exist and may be relevant to the
TechDirect audience.
Upcoming Live Internet Seminars
ITRC Radiation Site Cleanup: CERCLA Requirements and Guidance -
June 5. The focus of this ITRC training is EPA's guidance for
remediating radioactively contaminated sites, which can
facilitate cleanups that are consistent with how chemical
contaminants are addressed, except where technical differences
posed by radiation are addressed. This course also discusses
long term stewardship (LTS) challenges related to the large
radioactively contaminated sites. This understanding of LTS
issues is integral to the cleanup process and decisions made at
the radiation sites. For more information and to register, see
http://www.itrcweb.org or http://clu-in.org/studio .
ITRC Protocol for Use of Five Passive Samplers - June 7. This
training supports the understanding and use of the ITRC Protocol
for Use of Five Passive Samplers to Sample for a Variety of
Contaminants in Groundwater (DSP-5, 2007). The five technologies
included in this document include diffusion samplers,
equilibrated grab samplers; and an accumulation sampler. The
training starts with information common to all five samples then
focuses on each sampler as instructors describe the sampler and
explain how it works; discuss deployment and retrieval of the
sampler; highlight advantages and limitations; and present
results of data comparison studies. For more information and to
register, see http://www.itrcweb.org or http://clu-in.org/studio
.
ITRC Risk Assessment and Risk Management: Determination and
Application of Risk-Based Values - June 14. This training course
describes the development and application of risk-based
screening values. The first module provides a review of key risk
assessment concepts related to risk management. The second
module focuses on the process by which risk-based levels are
derived in different states. The third module examines the
application of risk assessment to remediation operations in two
case studies providing examples of how risk assessment has
actually been implemented, based upon research and case studies
conducted by the ITRC Risk Assessment Resources team. This
training course describes a number of the reasons behind
variations in risk-based screening values and their use in risk
management. For more information and to register, see
http://www.itrcweb.org or http://clu-in.org/studio .
New Documents and Web Resources
Soil Remediation, Revitalization, and Reuse: Technical
Performance Measures is now available. This CLU-IN section is a
tool to assist site project managers in selecting appropriate
Technical Performance Measures (TPMs) for evaluating the success
(risk reduction) of soil amendments or other in situ
technologies used for remediation, revitalization, and reuse of
contaminated sites. The database of TPMs and the search engine
at the heart of this new tool contain a range of potentially
applicable TPMs. This provides site managers the flexibility
they need to design the most appropriate testing for their sites
while providing consistency and comparability between sites. The
database includes a set of 'core' TPMs chosen for their ready
availability, reasonable cost, and level of standardization,
plus supplemental TPMs that could be useful and/or important
depending on specific conditions at your site. Users can search
the database by using criteria (including the project goal,
exposure pathway, and desired performance endpoint) that are
appropriate for their sites. The search results provide
information about each method that matches the selection
criteria, including whether the method is a 'core' TPM, comments
on issues to consider when using the method, and references for
additional information. The TPMs in the database currently focus
on metals, and the list is not exhaustive. Users are encouraged
to suggest other appropriate tests that should be included. Over
time, the matrix also may be expanded to include other types of
contaminants. For more information, see
http://www.clu-in.org/ecorevitalizatio ... .
Triad Implementation Guide (SCM-3). This document was
published by the Interstate Technology and Regulatory Council
(ITRC). It provides guidance for environmental organizations
that want to implement the U.S. Environmental Protection Agency
Triad process into their business practices. This document is
intended to complement the first Sampling, Characterization, and
Monitoring Team document, Technical and Regulatory Guidance for
the Triad Approach: A New Paradigm for Environmental Project
Management (ITRC 2003). Although this document is written to
specifically address issues that may be encountered by a state
agency, it should also be helpful to those in other segments of
government and in the private sector. Reasons for implementing
Triad are discussed, as are myths, potential obstacles, and
lessons learned. Challenges and solutions to anticipated issues
are discussed. The appendices include an example of an
organization attempting to establish Triad as an internal
policy. Other appendices include information on legal
defensibility, budget and procurement issues, and acceptability
of data generated via field methods and considerations dealing
with risk assessment (May 2007, 63 pages). View or download at
http://www.itrcweb.org/Documents/SCM-3 ... . For hard copies,
see http://www.itrcweb.org/gd.asp .
Grand Plaza Site Investigation Using the Triad Approach and
Evaluation of Vapor Intrusion (EPA 540/R-07-002). This document
provides a detailed report about a field study conducted by
EQM/URS on behalf of EPA's National Risk Management Research
Laboratory to characterize the subsurface contamination of
volatile organic compounds (VOCs) at a Brownfield commercial
site. The Triad approach was implemented to characterize the
extent of soil, groundwater, and soil gas contamination. These
data were used to assess impact on indoor air due to vapor
intrusion. Seventy-seven soil samples, twenty-eight groundwater
samples, and ten soil-gas samples were collected from
Geoprobe(TM) borings and analyzed on-site by USEPA Method SW-846
8265 direct sampling ion trap mass spectrometry (DSTIMS).
Additional SW-8260b and TO-15 analyses were performed on
approximately 10% of the samples by off-site laboratories.
Tetrachloroethylene (PCE), trichloroethylene (TCE) and
cis-1,2-dichloroethylene (DCE) were detected in all media with
PCE as the prevalent compound (September 2006, 86 pages). View
or download at
http://www.epa.gov/nrmrl/pubs/540r0700 ... .
Vapor Intrusion and Ambient Air Study Final Results Report:
Armen Cleaners, Ann Arbor, Michigan (EPA 542-R-06-010). This
report summarizes data collection and results from an
investigation at the Armen Cleaners site in Ann Arbor, Michigan.
The primary focus of the investigation was to identify issues
related to v
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