Secondary contamination occurs when hazardous substances are inadvertently transferred from contaminated individuals, equipment, or materials to uncontaminated areas, personnel, or environments. Not to be confused with primary contamination, which refers to the initial exposure to a hazardous agent, secondary contamination poses significant risks during operations in Hot, Warm, or Cold Zones. Effective management of secondary contamination is crucial during decontamination processes and incident command operations to safeguard responders and the surrounding community. In hazmat and CBRN operations, it is often referenced alongside scene control concepts such as Hot, Warm, and Cold Zones and decontamination corridors to clarify operational boundaries.
Category context: Hazardous materials, decon, isolation zones, UN/ERG concepts, and CBRN terminology.