Many people are not aware of what is required to decontaminate water supplies.
Three days after the explosion, 100 of those participants were taken into the contaminated area and then, after tests, were decontaminated.
I do not think that there are any problems with decontaminating some land.
Information specifically on decontaminated land which has subsequently been used for housing developments is not available centrally.
All the ships and the small craft were decontaminated successfully ensuring that there was no residual hazard.
Both these factories have been used for explosives, which means that before they can be put to alternative use, they have to be decontaminated.
If a single source caused the outbreak, it may have been missed during the environmental survey and epidemiological investigation, or may have been decontaminated prior to sampling.
While there is no ongoing decontaminating effect by water alone once the boots are out of a water bath, the ongoing effect of a disinfectant is significant.