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archived there. The TechDirect messages of the past can be   
searched by keyword or can be viewed as individual issues.  
  
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