70449 There have been a number of cases, particularly in the subsurface vadose zone, where contaminants have moved much more quickly than expected. Recent examples include the apparent movement of radionucleides from storage tanks into the groundwater at the Hanford reservation and at the… More

76166-Although permeable reactive barriers are an important new treatment option for groundwater remediation, no reliable methods are available to monitor or predict their long-term behavior. The large-scale implementation of reactive barriers will require a means of monitoring their long-term… More

75605-The United States Department of Energy has estimated that from the 1940s through the 1970s, 126,000 cubic meters of transuranic wastes were disposed of by shallow burial and other techniques at sites owned and operated by the federal government. The excavation and retrieval of the transuranic… More

76166B Although permeable reactive barriers (PRBs) are an important treatment option for groundwater remediation, no reliable methods are available to monitor or predict their long-term behavior. The large-scale implementation of reactive barriers will require a means of monitoring their long-term… More

78301S One of the most widely used geophysical methods for monitoring flow within the shallow subsurface is Electrical Resistively Tomography (ERT). The latest generation of ERT systems can monitor data to a precision of around 1%, allowing in situ changes to be interpreted within a few percent. … More

One of the most widely used geophysical methods for monitoring flow within the shallow subsurface is Electrical Resistivity Tomography (ERT). The latest generation of ERT systems can monitor data to a precision of around 1%, allowing in situ changes to be interpreted within a few percent. In turn,… More

Geologic carbon sequestration has become an effective technology for reducing atmospheric levels of CO2 by capturing emissions and injecting them into underground geologic formations where they can be permanently isolated. In order to assure that the CO2 is effectively sequestered for long periods… More

Although a number of new technologies are becoming available for environmental site remediation, the successful application of these technologies often depends on detailed knowledge of the site hydrogeology and the distribution of the contaminants. Recent research has demonstrated that the induced… More

An effort is underway by the U.S. DOE to develop cost-effective and environmentally sound technologies in order to help to stabilize atmospheric concentrations of CO2 and to reduce greenhouse gas emissions. There is a significant need for economical methods to characterize potential sequestration… More