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This report highlights significant projects that the ETSC has supported throughout fiscal year 2014. Projects have addressed an array of environmental scenarios, including but not limited to remote mining contamination, expansive landfill waste, sediment remediation by capping, ...

There are five active Technical Support Centers (TSC) operated by the Office of Research and Development (ORD). All are co-funded by the Office of Solid Waste and Emergency Response (OSWER) and ORD, and supported by EPA Regions and Offices. Each TSC is dedicated to serving the E...

The U.S. Environmental Protection Agency (EPA) is tasked to protect human health and the environment. To carry out this task, the EPA makes use of technical expertise within its Office of Research and Development. Restoration and protection of water resources is one area of tec...

Inadequate site characterization and a lack of knowledge of subsurface contaminant distributions (particularly Non-Aqueous Phase Liquids [NAPLs]) hinder our ability to make good decisions on remediation options and to conduct adequate cleanup efforts at contaminated sites. Non-i...

The potential application of monitored natural attenuation (MNA) as a remedy for ground water contaminated with arsenic (As) is examined for a subset of contaminated sites, specifically those where naturally occurring As has been mobilized due to localized anthropogenic organic c...

Persistent organic pollutants (POPs) such as Polychlorinated biphenyls (PCBs) are notorious for their widespread prevalence in aquatic and sedimentary ecosystems, recalcitrance, and carcinogenicity. Dredging and land-filling are still commonly used for treating PCB contaminated m...

The hazard for photoactivated toxicity of polycyclic aromatic hydrocarbons (PAHs) has been clearly demonstrated; however, to our knowledge, the risk in contaminated systems has not been characterized. To address this question, a median lethal dose (LD50) for fluoranthene photoa...

The primary goal of the Superfund Human Health Risk Technical Support Center (STSC) is to provide scientific technical support in the area of human health risk assessments for the Office of Land and Emergency Management (OLEM), state, and regional partners. The STSC is operated b...

The primary goal of the Superfund Human Health Risk Technical Support Center (STSC) is to provide scientific technical support in the area of human health risk assessments for the Office of Land and Emergency Management (OLEM), state, and regional partners. The STSC is operated b...

The primary goal of the Superfund Human Health Risk Technical Support Center (STSC) is to provide scientific technical support in the area of human health risk assessments for the Office of Land and Emergency Management (OLEM), state, and regional partners. The STSC is operated b...

In 1987, the U.S. Environmental Protection Agency’s (EPA) Office of Research and Development (ORD), Office of Land and Emergency Management, and EPA Regional waste management offices established the Technical Support Project. The creation of the Technical Support Project enabled...

The U.S. German Bilateral Working Group originated in 1990 in order to share and transfer information, ideas, tools and techniques regarding environmental research. The U.S. Environmental Protection Agency (EPA)/Office of Research and Development (ORD) and the German Federal Mini...

Management of contaminated sediments poses many challenges due to varied contaminants and volumes of sediments to manage. Dredging, capping, and monitored natural recovery (MNR) are the primary approaches for managing the contaminated sediment risks. Understanding how well the ...

Ongoing efforts between the Office of Research and Development and the Office of Solid Waste and Emergency Response have included technical guidance support, field demonstration activities, data analysis, and technology transfer activities in evaluating the impacts of vapor intru...

NRMRL-ADA-01151 Wilkin*, R.T., Ford*, R., and Wallschlaeger, D. "Arsenic Transport and Fate in Sulfidic Environments: As(III) - FeS Interactions." In: Geological Society of America, Abstracts with Programs, Geological Society of America Annual Meeting, Boston, MA, 11/05-08/2001....

This broad-based study addressed three categories of issues related to the design,<br>construction, and performance of waste containment systems used at landfills, surface<br>impoundments, and waste piles, and in the remediation of contaminated sites. Geosynthetic materials have...

The speciation, or chemical form of elements governs their fate, toxicity, mobility, and bioavailability in contaminated soils, sediments and water as well as food chain transfer mechanisms. To assess these chemical properties and to accurately gauge contaminant impact on human h...

The United States Environmental Protection Agency (EPA) and the German Federal Ministry of Education and Research (BMBF) have been working in an ongoing partnership to gain an understanding of each other's approach to the cleanup of chemical contamination in order to protect huma...

Vapor intrusion is the movement of volatile chemicals in the subsurface that eventually contaminate the indoor air that people breathe in overlaying buildings. This often overlooked exposure pathway of hazardous chemicals is a significant environmental health hazard. The USEPA ...

Phytoremediation has the potential to be implemented at mercury (Hg) and methylmercury (MeHg) contaminated sites. Water hyacinths (<I>Eichhornia crassipes</I>) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associat...

NHEERL's research in this area focuses on ecological effects of bioaccumulative chemicals, such as PCBs. The research is designed with recognition that sites of different size and complexity require bioaccumulation models with correspondingly complex and/or extensive data requir...

The presence of contaminated sediments in aquatic environments results in several potential sources of ecological risk. These risks include the release of contaminants into the water column causing exposure to pelagic organisms. Possible adverse biological effects of this exposu...

Research on capping technologies is directed at assessing the effectiveness of innovative capping materials, factors that control contaminant release at the sediment-water interface, installation of cap, resuspension mechanism, and gas ebullition. U.S. EPA's Land Remediation and ...

Modeling approaches for evaluating the transport and fate of sediment and associated contaminants are briefly reviewed. The main emphasis is on: 1) the application of EFDC (Environmental Fluid Dynamics Code), the state-of-the-art contaminated sediment transport and fate public do...

Reactive activated carbon (RAC) impregnated with palladized iron nanoparticles has been developed to treat polychlorinated biphenyls (PCBs). In this study, we evaluated the effects of various reaction environments on the adsorption-mediated dechlorination of 2-chlorobiphenyl (2-...