A USGS scientist prepares a tracer solution in a gas-tight bladder
By Environmental Health Program
2007 (approx.)
![A USGS scientist prepares a tracer solution in a gas-tight bladder that will be pumped into the groundwater](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/NitrateTransToolInjection_l.jpg?itok=vF2KI5JU)
Detailed Description
A USGS scientist prepares a tracer solution in a gas-tight bladder that will be pumped into a zone of nitrate-containing groundwater to monitor the production and consumption of nitric oxide dissolved in groundwater.
Sources/Usage
Public Domain.