Structural contamination events are numerous in number. Late discovery (decomposition) and tear gas exposures are, by far, the top two more intrusive contamination events capable of creating Immediately Dangerous to Life and Health (IDLH) hazards. The multi-phase process to effectively and safely decontaminate a structure exposed to tear gas residue is complex, labor-intensive and fraught with risk.
In the course of an apprehension, tear gas ordnance, also referred to as Chlorobenzylidene Malononitrile (CS) or Chloroacetophenone (CN), may be deployed into a structure by law enforcement.