Dnapl Source Articles & Analysis
8 news found
This large and extremely high profile site had a combination of ubiquitous TCE contamination, varying and challenging lithology, DNAPL “surprises” and a property transfer set of clean-up criteria that bordered on the impossible (post-injection monitoring points registered below the MCLs or ND for TCE and degradation byproducts. ...
/USA) Remediation Case Study: Demonstrating Sequential Dechlorination of PCE in DNAPL Source Zones Using a Weight-of Evidence Approach. J. Ho, J. Byrne, and J. ...
Gary Wealthall presented data from an experiment done at the SABRE site in the UK. He discussed how the DNAPL source zone was characterized, and the difficulties in estimating the actual mass before, during, and after remediation. ...
Their limited aqueous solubility often leads to the presence of dense non-aqueous phase liquid (DNAPL) source zones, which may persist due to mass transfer limitations from the DNAPL to groundwater. ...
The 2011 Symposium will run from October 27th to 28th, and will feature the following guest speaker lineup: Rick Devlin, University of Kansas – "Assessment of Groundwater Velocity Measurements with PVPs" Jim Barker, University of Waterloo – "The Capillary Fringe: Monitoring and Remediation in this Neglected Zone" Gary Wealthall, GeoSyntec – "Characterizing ...
One embodiment of this innovation involves delivering micro-blue green algae, as an electron donor, into induced fractures in low permeability soils to create and maintain nutrient-rich anaerobic conditions that will promote the long-term bioremediation of a chlorinated solvent or other dense nonaqueous phase liquid (DNAPL) source. A second embodiment of this ...
These compounds, including degreasers, dry cleaning fluids, creosote, solvents and coal tar, when present below ground can generate hazardous concentrations for decades to centuries as they dissolve into the surrounding groundwater. The successful cleanup of DNAPL-contaminated sites depends on our ability to understand the processes that transfer the contamination from the ...
Future expansion may include ethers, halogenated alkanes, polychlorinated biphenyls, and other chemicals that form DNAPLs. With the primary focus on source zone cleanup, information is provided for available remediation technologies, such as bioremediation, in situ flushing and oxidation, and thermal processes. ...