Monitoring of Water and Contaminant Migration at the Groundwater-Surface Water Interface
Cost and performance rept.
SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
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The Department of Defense DoD and other government and private entities are in the process of identifying, assessing, and remediating a large number of terrestrial hazardous waste sites. Many of these sites are located adjacent to harbors, bays, estuaries, wetlands, and other coastal environments Chadwick, Kito, Carlson, and Harre, 2003a. There is a general requirement to determine if contaminants from these sites are migrating into marine and surface water systems at levels that could pose a threat to the environment. Currently, these problems are evaluated by the use of hydraulic head measurement in shoreside wells and numerical models that provide theoretical predictions of flow and contaminant migration. However, these measurements and models are of limited utility in areas adjacent to marine systems where tides, waves, and strong density gradients make it difficult to establish boundary conditions. In addition, current techniques for verifying the model predictions are inadequate. The overall objective of this project was to field demonstrate and evaluate the effectiveness of two technologies for characterizing coastal contaminant migration. The specific objectives of this demonstration were to achieve the following Demonstrate that the Trident probe can be used to help delineate areas where groundwater seepage is occurring and contaminant of concern CoC concentrations in those areas Demonstrate that the UltraSeep system can be used to quantify the flow of groundwater and concentration of contaminants that may be impinging on the surface water system Demonstrate the technology to end users to determine the utility of these tools for making decisions at DoD coastal landfills and hazardous waste sites Quantify costs associated with the operation of each technology.
- Water Pollution and Control