Long-term Trends in Vadose Zone Gas Concentrations and Fluxes as Indicators of Changing Crude Oil Composition and Degradation Rates


Jared Trost, USGS Minnesota Water Science Center, Mounds View, United States, Geoffrey N Delin, USGS, Denver, CO, United States and Barbara A Bekins, USGS, Branch of Hydro-Ecological Interactions, Menlo Park, United States