US EPA TechDirect January 1, 2012
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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 Integrated DNAPL Site Strategy - January 10, 2012, 2:00PM-4:15PM EST (19:00-21:15 GMT). The ITRC Integrated Dense Nonaqueous Phase Liquid Site Strategy
(IDSS-1, 2011) technical and regulatory guidance document will assist site managers in development of an integrated site remedial strategy. This course
highlights five important features of an IDSS including: a conceptual site model (CSM) that is based on reliable characterization and an understanding of
the subsurface conditions that control contaminant transport, reactivity, and distribution; remedial objectives and performance metrics that are clear,
concise, and measureable; treatment technologies applied to optimize performance and take advantage of potential synergistic effects; monitoring based
on interim and final cleanup objectives, the selected treatment technology and approach, and remedial performance goals; and reevaluating the strategy
repeatedly and even modifying the approach when objectives are not being met or when alternative methods offer similar or better outcomes at lower cost. For
more information and to register, see or . Mine Tailings: Enumeration and Remediation - January 11, 2012, 1:00PM-3:00PM EST (18:00-20:00 GMT). This seminar will feature Dr. Eric Betterton and Dr.
Raina Maier from the University of Arizona Superfund Research Program and will focus on field trials being performed at mining sites in Arizona. Mine tailings
are large piles of crushed rock leftover after the minerals of interest have been processed. They often do not support establishment of a plant cover, are prone
to wind and water erosion, and may contribute to the dispersion of associated metal toxicants. Dr. Eric Betterton will discuss size-selective characterization
of aerosols collected with samplers called 'Multiple Orifice Uniform Deposit Impactors' at two Arizona mining sites, the Asarco plant in Hayden, AZ, and the
Iron King Mine and Humboldt Smelter Superfund site in Dewey-Humboldt, AZ. Chemical speciation shows that arsenic and lead occur preferentially in the submicron
fraction at both sites; lead isotope analysis shows great promise for source apportionment at both sites; and scanning electron microcopy shows evidence
for spherical particle formation by high-temperature processing at Hayden. Data from dust flux towers installed at Iron King, and dust modeling studies will
be described. Dr. Raina Maier will discuss phytostabilization, a technology being investigated for remediation of mine tailings sites in arid and semi-arid
environments. The goal is to create a vegetative cap using native plants that will 1) prevent wind and water erosion of the tailings, 2) stabilize metal contaminants
in the rooting zone, and 3) avoid shoot uptake of metal contaminants. The Iron King Mine and Humboldt Smelter Superfund Site is adjacent to the town of Dewey-Humboldt,
Arizona. Soil in residential yards contains elevated levels of arsenic, lead, and zinc associated with tailings particles that have been dispersed as dust,
primarily by wind. Working together with the site owner and Region 9 EPA, a phytostabilization trial was initiated on site in May 2010, which was further expanded
in 2011, using native plants that were shown to meet successful phytostabilization criteria in preliminary greenhouse trials. The site is being monitored
to determine whether greenhouse results can be successfully translated to the field and to examine changes in chemical, physical, and biological properties
of the tailings as phytostabilization occurs. For more information and to register, see . ITRC Development of Performance Specifications for Solidification/Stabilization - January 12, 2012, 11:00AM-1:15PM EST(16:00-18:15 GMT). The ITRC
technical and regulatory guidance document Development of Performance Specifications for Solidification/Stabilization (S/S-1, 2011) and associated
Internet-based training provide an approach to assist practitioners and regulators with measuring and determining acceptable S/S performance. This approach
developed by the ITRC Solidification/Stabilization Team provides information for developing, testing, and evaluating appropriate site-specific performance
specifications and the considerations for designing appropriate long-term stewardship programs. In addition, the approach provides useful tools for establishing
an appropriate degree of treatment and regulatory confidence in the performance data to support decision-making. This training and guidance is intended
to be beneficial to anyone involved with CERCLA, RCRA, Brownfields, UST or any other regulatory program where S/S has been selected or implemented as a remedial
technology. For more information and to register, see or . SRP Funding Opportunities Web Seminar - January 17, 2012, 2:00PM-4:00PM EST (19:00-21:00 GMT). The SRP will be holding a web seminar to provide information
about current funding opportunities: Small Business Innovative Research Small Business Innovation Research / Small Business Technology Transfer Research
(SBIR / STTR) Grants (R43 / R41) Hazardous Substances Detection and Remediation Program ( ...
and RFA-ES-12-003 ( ... 'Superfund Hazardous Substance Research and Training Program
(P42)'. Primary focus will be on the new multi-project center grant announcement (P42), including an emphasis on changes compared to previous solicitations.
Participants will have an opportunity to ask questions. For more information and to register, see . ITRC Permeable Reactive Barrier: Technology Update - January 24, 2012, 2:00PM-4:15PM EST (19:00-21:15 GMT). The ITRC Technical/Regulatory Guidance
Permeable Reactive Barrier: Technology Update (PRB-5, 2011) and associated Internet-based training is intended to help guide state and federal regulators,
consultants, project managers and other stakeholders and technology implementers through the decision process when a Permeable Reactive Barrier (PRB)
is being considered as a remedy, or part of a remedy, to address contaminated groundwater; and to provide updated information regarding several technical
aspects of the PRB using information attained from the more than 15 years that the PRB has been a viable and accepted in situ remediation technology for contaminated
groundwater. The guidance and training provides an update on PRBs to include discussions of additional types of reactive media and contaminants that can be
treated, design considerations, construction/installation approaches and technologies, performance assessment and longevity. For more information
and to register, see or . ITRC Incorporating Bioavailability Considerations into the Evaluation of Contaminated Sediment Sites - January 26, 2012, 11:00AM-1:15PM EST (16:00-18:15
Posted: 01/01/2012 By: Professor Paul Bardos