WHAT IF…

Sometimes you are facing a lot of unprotected and / or injured contaminated persons (e.g., passengers of a ferry) in the initial phase of the rescue action, before you have clear and detailed information about the HNS involved. As a result, you have to deal with mass decontamination, while not knowing what is the right decontamination method or decontamination agent. For example water, as the standard decontamination agent, could react heavily with the contaminant. What would you do in this situation?