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USGS Scientist Processing a Suspended Sediment Sample

By Environmental Health Program
USGS scientist lifting a filter caked with sediment that's on top of a filter plate used for filtering suspended sediment
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Detailed Description

USGS scientist lifting a filter caked with sediment that's on top of a filter plate used for filtering suspended sediment from water samples. The filter was saved for later analysis for pyrethroid insecticides in the sediment. USGS scientists have developed a method to determine the concentration of a suite of pyrethroid insecticides absorbed to sediment particles.

Sources/Usage

Public Domain.