INVESTIGATING AMENDMENT DELIVERY MECHANISMS FOR IN SITU STABILIZATION OF STRONTIUM-90 IN POROUS AND FRACTURED MEDIA RESULTS OF THE INFILTRATION TEST CREATED BY THE FLOW OF THE BIG LOST RIVER

Subsurface monitoring results and initial site characterization and will be shown. The research center captured infiltration of surface water from a nearby ephemeral river that flowed for ten days in June 2005. The recharge event provides insight into the formation, redistribution, and longevity of perched water zones that form in complex, heterogeneous vadose zones. The transport behavior captured during this recharge event demonstrates the inherent challenges associated with delivering contaminant stabilization amendments to target regions of the vadose zone at the INL. Data collected during the characterization event included traditional hydrological data such as water potential, water content, and perched water pressures, in addition to three-dimensional time-lapsed electrical resistivity tomography. Comparisons of the information derived from the various data sets will be presented