Low-Level Radioactive and Mixed- Hazardous Wastes
Collecting soil-pit samples for a collaborative study with the U.S. Army near Yuma, Arizona, February 2007. Samples were used to determine physical properties and moisture conditions of the soil.
Equipment used by USGS scientists to sample tritium in unsaturated-zone vapors.
Installing access shaft for subsurface measurements in the unsaturated zone.
Vertical shaft (5 feet in diameter and 45 feet deep) being installed to provide access to unsaturated zone sediments.
The top of the access shaft after installation. Instrumentation to measure the movement of moisture in the unsaturated zone radiate away from the shaft.
Installation of a borehole designed to measure the transport of water vapor in a deep unsaturated zone.
Collecting gas samples for isotopic analysis of Carbon-14 dioxide from a deep borehole.
Construction of a test waste-burial trench.
Completed test trench facility.
Processing unsaturated-zone core samples for later analysis.
Apparatus for measuring saturated hydraulic conductivity of soil.
On-site weather station.
Distant view of the research site.
Distant view of the research site and the waste facility looking north. Typical desert vegetation seen in the foreground.
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