Can ORC be used to treat the vadose zone?
Yes, if a well-defined vadose zone contaminant mass is present and there is sufficient soil moisture to activate the release of oxygen from ORC. Additionally, there must be enough moisture to support biological activity. Typically, bacteria are located in thin films of water and contaminant that coat soil, and these thin films must have enough area to provide good contact between bacteria, oxygen, and contaminant.
