Chemical releases may be accidental or deliberate, covert or overt.
Following the release of a chemical into the environment, a dynamic risk analysis
of the situation informs the nature of the response required.
"CBRN incidents" are distinct from HazMat incidents, in that CBRN involves deliberate
release and a response management structure coordinated by the Police.
Guidelines and information have been compiled on the assessment and response to
incidents involving specific chemical warfare materials.