The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program develops field and laboratory methods to measure a wide range of environmental properties, and develops approaches and protocols used to assess or characterize contamination.
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Inside view the USGS's mobile laboratory truck showing instrumentation for the on site determination of chromium VI with an ion chromatograph (EPA Method 218.6) -- from the Chromium VI Field Method Photo Gallery
Bibliography
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