The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program develops field methods to measure a wide range of environmental properties, and develops approaches and protocols used to assess or characterize contamination.

• Field Methods
• Study Approaches

The Program also develops laboratory analytical methods to measure a wide variety of chemicals in environmental media.

A diagram of the BAT³ in a bedrock borehole with borehole packers inflated to seal against the borehole wall. The length of the test interval is adjusted by adding additional sections of pipe between the fluid-injection apparatus and the bottom packer. The BAT³ is lowered or raised in the borehole using steel pipe or a cable attached above the transducer shrouds -- from the BAT³ Photo Gallery/afs/.usgs.gov/www/toxics/htdocs/photo_gallery/benthic_flux.html -- from the Benthic Flux of Dissolved Metals Photo Gallery

Bibliography

• Publications on Methods ( 940 Publications)