Contaminant transport and fate in the unsaturated zone.
The use and development of tracer tests to study contaminant transport and fate.
In order to minimize ecological effects, it is essential to understand how a contaminant moves and is altered in the environment.
Large-scale studies of the occurrence and distribution of new contaminants in the environment - Reconnaissance studies.
One focus of the USGS Toxic Substances Hydrology (Toxics) Program is to investigate the occurrence and fate of agricultural chemicals in the environment from pesticides, fertilizers, veterinary...
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