TG2.RAST is concerned with advancing the knowledge, effectiveness, and safety of Reactive Air and Surface Treatment and associated technologies for air cleaning and surface disinfection. This TG will be responsible for Photocatalytic Oxidation, Ionization, Hydrogen Peroxide, and other associated or new technologies not specifically covered by another TC. In particular, devices using only ultraviolet radiation to destroy or inactivate biological air and surface contaminants in HVAC systems and indoor spaces are not included.