USGS crew handling water quality equiptment
![A picture of water quality equiptment](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/2017-06-12_usgs-cache-creek-water-quality.jpg?itok=4RUaQ8SD)
Detailed Description
USGS research chemist, Charlie Alpers, explains the nuances of water quality equipment to physical science technician, Shanna Rose. Photo: Bonnie Dickson, USGS.
Sources/Usage
Public Domain.