US EPA TechDirect, May 1, 2012
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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 Use and Measurement of Mass Flux and Mass Discharge - May 3, 2012, 11:00AM-1:15PM EDT (15:00-17:15 GMT). The ITRC technology overview, Use and Measurement
of Mass Flux and Mass Discharge (MASSFLUX-1, 2010), and associated Internet-based training provide a description of the underlying concepts, potential
applications, description of methods for measuring and calculating, and case studies of the uses of mass flux and mass discharge. This Technology Overview,
and associated Internet-based training are intended to foster the appropriate understanding and application of mass flux and mass discharge estimates,
and provide examples of use and analysis. The document and training assumes the participant has a general understanding of hydrogeology, the movement of chemicals
in porous media, remediation technologies, and the overall remedial process. For more information and to register, see or
. Superfund Research Program Sediment Bioavailability Assays - Kick-off Webinar Featuring New Research Projects - May 7, 2012, 3:00PM-5:00PM EDT (19:00-21:00
GMT). This webinar will be comprised of 5 short presentations from the Superfund Research Program Individual Research Grants (R01). The NIEHS Superfund Research
Program (SRP) released a funding opportunity announcement in 2010 titled RFA ES-11-005 'Innovative Bioavailability Assays to Assess the Effectiveness
of Contaminated Sediment Remediation (R01).' This solicitation called for the development of innovative assays of bioavailability that may be used to determine
the effectiveness of sediment remediation in reducing risks to humans. The ultimate goals of this solicitation are two-fold: first, to develop and introduce
new tools to assess whether remediation efforts are protective of human health; and second, to increase use of bioavailability in risk assessment through
providing scientifically-valid, practical, and cost-effective tools. In response to this solicitation, five three-year awards were made in 2011. For more
information and to register, see . ITRC Soil Sampling and Decision Making Using Incremental Sampling Methodology Parts 1 and 2 - May 8 and 15, 2012. This 2-part training course along with ITRC's
web-based Incremental Sampling Methodology Technical and Regulatory Guidance Document (ISM-1, 2012) is intended to assist regulators and practitioners
with the understanding the fundamental concepts of soil/contaminant heterogeneity, representative sampling, sampling/laboratory error and how ISM addresses
these concepts. Through this training course you should learn: basic principles to improve soil sampling results, systematic planning steps important to
ISM, how to determine ISM Decision Units (DU), the answers to common questions about ISM sampling design and data analysis, methods to collect and analyze ISM
soil samples, the impact of laboratory processing on soil samples, and how to evaluate ISM data and make decisions. In addition this ISM training and guidance
provides insight on when and how to apply ISM at a contaminated site, and will aid in developing or reviewing project documents incorporating ISM (e.g., work
plans, sampling plans, reports). For more information and to register, see or . Staying Connected with CLU-IN - May 9, 2012, 1:00PM-2:00PM EDT (17:00-18:00 GMT). This seminar will discuss information delivery services offered by the
Clean-Up Information Network (CLU-IN). Presenters will highlight new Facebook and Twitter feeds to keep interested parties connected to CLU-IN. Other services
such as free e-newsletters, RSS feeds, Podcasts, and online training will also be showcased. For more information and to register, see
. ITRC LNAPL Training Parts 1, 2, and 3 - May 10, 17, 24. Light non-aqueous phase liquids (LNAPLs) are organic liquids such as gasoline, diesel, and other petroleum
hydrocarbon products that are immiscible with water and less dense than water. LNAPLs are important because they are present in the subsurface at thousands
of remediation sites across the country, and are frequently the focus of assessment and remediation efforts. Part 1 of this training course explains how LNAPLs
behave in the subsurface and examines what controls their behavior. Part 1 also explains what LNAPL data can tell you about the LNAPL and site conditions. Relevant
and practical examples are used to illustrate key concepts. Part 2 addresses LNAPL characterization and site conceptual model development as well as LNAPL
recovery evaluation and remedial considerations. Specifically, Part 2 discusses key LNAPL and site data, when and why those data may be important, and how
to get those data. Part 2 also discusses how to evaluate LNAPL recoverability. Part 3 uses the LNAPL conceptual site model (LCSM) approach to identify the LNAPL
concerns or risks and set proper LNAPL remedial objectives and technology-specific remediation goals and performance metrics. Part 3 also provides an overview
of the LNAPL remedial technology selection framework. For more information and to register, see or . Understanding Arsenic: From Vasculature to Vegetables - May 16, 2012, 1:00PM-3:00PM EDT (17:00-19:00 GMT). This two-part seminar will feature Dr. Todd
Camenisch and Monica Ramirez-Andreotta from the University of Arizona Superfund Research Program and will focus on arsenic effects on cardiovascular development
and arsenic uptake in garden vegetables. The impact of arsenic on human health has been largely focused on cellular transformation and cancer in adults. Mechanistic
studies of arsenic on the cardiovascular system have been limited, and even less is known about the effects of early arsenic insult (pre- or neonatal) on cardiotoxicity.
Dr. Todd Camenisch will discuss studies using a mouse model as an intact system to reveal mechanisms of arsenic-triggered cardiovascular toxicity during
development. To our knowledge, this is the first animal study to assess cardiovascular changes in response to chronic exposure to environmentally-relevant
concentrations of arsenic. Measures of cardiac formation and function have revealed important effects on cardiac development in the mouse model; outcomes
and significance for cardiovascular health in chronically-exposed populations will be discussed. There is a growing need to accurately evaluate the toxicological
risks to resident food gardeners neighboring contaminated environments. M?nica D. Ram?rez-Andreotta, MPA, will report on her study Gardenroots: The Dewey-Humboldt,
Arizona Garden Project, which was designed to determine the uptake of arsenic and lead in commonly grown vegetables in Arizona and evaluate the possible health
risks to the local population. The project comprised a greenhouse study and a citizen science program conducted with a community neighboring a national Superfund
site. A comparative analysis was conducted between the concentrations of arsenic and lead found in the soils, irrigation water, edible ti
Posted: 01/05/2012 By: Professor Paul Bardos