USGS - science for a changing world

Environmental Health - Toxic Substances

Crosscutting Topics


Field and laboratory environmental measurement methods

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.

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

Map of the SD5 area
Map of the extent of discharge for storm drain-5 (SD-5) plume in Johns Pond, Massachusetts. Contour lines are TCE concentrations in parts per billion (ppb). Note the TCE "hot spot" separate from the main discharge area. Further investigations showed that the "hot spot" was from another plume -- from the Passive-Vapor-Diffusion Sampler Photo Gallery


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Page Last Modified: Tuesday, 04-Aug-2015 15:47:23 EDT