The report summarizes the basis for decontamination trials that will be carried out to increase knowledge of how C- and B-decontamination of facilities should be carried out. Searches on the internet regarding similar studies, as well as interviews with participating authorities and organizations that summarize their specific conditions for decontamination, as well as the means and methods they currently use, and conclusions from previously completed 2:4 projects, have been weighed together to produce the parameters that is recommended to be used in further experimental decontamination studies within this project.