The General Motors Superfund site has been undergoing remediation for decades but may finally be nearing completion.
To be used as decision tools, such models should be able to capture the complex processes of mass transfer and mixing from entrapped NAPL sources undergoing remediation.
This paper presents the evaluation of an existing numerical model of multiphase flow and transport for its ability to conduct analysis on the expected solute concentrations downstream of NAPL source zones undergoing remediation.
These procedures were subsequently incorporated into health-based exposure standards for paint, dust, and bare soil for housing undergoing remediation, renovation, or repainting (U.S. EPA 2001a).
The Salmonella reverse mutation assay is a logical choice for monitoring changes in the genotoxic activity of PAH-contaminated soils, such as those at former gasworks sites, which are undergoing remediation.
The results highlight the need for concurrent chemical and toxicological profiling of contaminated sites undergoing remediation to ensure elimination of priority contaminants as well as a reduction in toxicological hazard.
It is evident that cost effectiveness is particularly sensitive to risk of radon related lung cancer and discount rates and that it is also influenced by the proportion of homes over the action level undergoing remediation.
The latter results as well as other published works that examined temporal changes in the mutagenic activity of contaminated soils undergoing remediation [e.g., Brown et al., 1986; Aprill et al., 1990; Donnelly et al., 1990] suggest that longer periods of remediation may be required to significantly reduce the mutagenic hazard of a contaminated soil.
He has flown to Perth to undergo a remediation programme with Daryl Foster, a biomechanical expert at the University of Western Australia.
Ohio State said the president, Gordon Gee, was undergoing a "remediation plan" because of the remarks.
