We have found that EOS® does not migrate a significant distance away from the injection point. Once the injection process stops, the driving force ceases and EOS®, by design, sorbs to the aquifer materials and does not continue to migrate with groundwater. Downgradient monitoring using visual indicators (such as breakthrough into downgradient performance monitoring wells), or increases in total organic carbon (TOC) can be used to evaluate how far EOS® has moved through the aquifer. Recirculation is another way to provide hydraulic control during injection or to move EOS® in a particular direction or distance in the subsurface.
