US EPA TechDirect January 1, 2008
Happy Holidays and may you have a prosperous new year! Welcome   
to TechDirect. Since the December 1 message, TechDirect gained   
167 new subscribers for a total of 29,714. If you feel the   
service is valuable, please share TechDirect with your   
colleagues. Anyone interested in subscribing may do so on CLU-IN   
at . All previous issues of TechDirect are   
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 Perchlorate: Overview of Issues, Status, and Remedial   
Options - January 15. Improved analytical methodology has   
increased the known extent of perchlorate contamination in the   
U.S. A variety of remediation technologies are currently   
commercially available and being used for perchlorate   
remediation. This training, based on ITRC's Perchlorate:   
Overview of Issues, Status, and Remedial Options (PERC-1),   
explains why perchlorate is a hot topic in the environmental   
community including up-to-date information on sources,   
occurrences, toxicity and exposure, regulatory status and   
remediation alternatives. For more information and to register,   
see or .  
ESTCP Solicitation - January 17. This seminar will provide a   
summary of the Environmental Security Technology Certification   
Program (ESTCP) funding opportunities for interested   
investigators to conduct innovative technology   
demonstrations/validations. This 'how to play' briefing will   
offer essential information for those who wish to understand new   
funding opportunities within ESTCP. The FY09 ESTCP solicitation   
will be released in early January and attendees may use this   
time to ask general questions about the solicitation. For more   
information and to register, see .  
Community Action for a Renewed Environment (CARE) National   
Webcast for the 2008 Request for Proposal - January 18, February   
11 and 27. This webcast is an opportunity for potential   
applicants to the CARE cooperative agreement program to learn   
more about and ask questions about the Request for Initial   
Proposals that was issued in December 2007. Visit for more information on the CARE program. To   
register, see .  
Characterizing Mass Transfer and Mass Flux for DNAPL Source   
Zones - January 22. To accurately assess the human health risks   
associated with DNAPLs in the subsurface, and to design   
effective remediation systems for such contamination, it is   
essential to understand contaminant mass-transfer and mass flux   
behavior associated with DNAPL source zones. The contaminant   
mass flux or mass discharge emanating from a source zone, also   
referred to as the source strength or source function, is a   
primary determinant of the risk associated with a contaminated   
site. Concomitantly, the reduction in mass flux achieved with a   
specific level of source-zone mass removal (or mass depletion)   
is a key metric for evaluating the effectiveness of a   
source-zone remediation effort. Thus, there is great interest in   
characterizing, estimating, and predicting relationships between   
mass flux reduction and mass removal. The nature of the   
relationship between mass flux reduction and mass removal will   
be mediated by the properties and distribution of the porous   
medium and of the DNAPL (source-zone architecture), and their   
resultant impacts on the pore-water velocity field and   
mass-transfer dynamics. In addition, the relationship between   
mass flux reduction and mass removal may change with time due to   
temporal changes in source-zone architecture and mass-transfer   
dynamics (i.e., source-zone aging). Furthermore, the   
mass-flux-reduction/mass removal relationship may be affected by   
source-zone remediation efforts. These issues will be   
illustrated using the results of studies spanning a range of   
spatial and temporal scales. For more information and to   
register, see .  
ITRC Remediation Process Optimization Advanced Training -   
January 24. Remediation Process Optimization (RPO) is the   
systematic evaluation and enhancement of site remediation to   
ensure that human health and the environment are being protected   
over the long term at minimum risk and cost. The purpose of this   
ITRC training is to present an overview of the material covered   
in five technical fact sheets that ITRC's RPO Team produced to   
enhance site remediation optimization and decision-making. The   
training modules provide additional information and techniques   
to improve project schedules, effectively manage resources,   
emphasize risk, and discuss tools to efficiently cleanup   
contaminated sites. For more information and to register, see or .  
ITRC Risk Assessment and Risk Management: Determination and   
Application of Risk-Based Values - January 29. 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 or .  
New Documents and Web Resources  
CLU-IN Site Tour. CLU-IN houses the latest detailed information   
on innovative site characterization, monitoring, and remediation   
approaches. In fact, CLU-IN has so many resources and services   
available that it can be hard for new visitors to quickly see   
all that it has to offer. The CLU-IN Site Tour briefly describes   
some of the CLU-IN resources that can make your job easier. Take   
the tour at .  
The Use of Soil Amendments for Remediation, Revitalization, and   
Reuse (EPA 542-R-07-013). In August 2006, the U.S. EPA Office of   
Superfund Remediation and Technology Innovation brought together   
18 federal and local government, academic, and private sector   
experts to answer questions about using soil amendments in   
remediating, revitalizing, and reusing contaminated lands. A new   
tool to encourage and assist site cleanup managers to use soil   
amendments for remediation, revitalization, and reuse of their   
sites resulted from this collaboration. The Use of Soil   
Amendments for Remediation, Revitalization, and Reuse is a white   
paper that describes soil amendments, the advantages of using   
them, the types of environmental problems and contaminants they   
can address, the types of sites where they can be used, and   
regulatory and other issues related to using them. It focuses on   
the use of amendments on sites dominated by inorganic   
contaminants, although they also can be used to address volatile   
and semivolatile contaminants that have left sites barren of   
vegetation (December 2007, 59 pages). View or download at   
Posted: 03/01/2008 By: Professor Paul Bardos