Decontamination is needed in order to:

ARemove contaminants from people and equipment
BTreat injuries resulting from chemical emergencies
CIdentify chemicals involved in an accident
DEstimate the amount of contaminant to which a person has been exposed

Verified Answer :

Aremove contaminants from people and equipment

decontamination: the process of cleaning an object or organism from contaminants and/or hazardous stuff/chemicals