You can transform your HazMat policy.
In addition to a protocol for everyday hazardous materials incidents, you need one for weapons of mass destruction, which include nuclear, chemical, or biologic agents. Direct minimally injured patients to a holding area. Have a plan for decontaminating hundreds or perhaps thousands of people. Have reference tables that list agents, symptoms, and the antidotes and decontamination supplies or various exposures.
D001694:Biological Warfare; D002619:Chemical Warfare Agents / Q000009:adverse effects*; D003666:Decontamination; D004189:Disaster Planning / Q000592:standards*; D004636:Emergency Service, Hospital / Q000458:organization & administration* / Q000592:standards; D015386:Hazardous Substances; D006801:Humans; D009689:Nuclear Warfare; D016134:Organizational Policy; D014218:Triage; D014481:United States; D014754:Violence
D002619:Chemical Warfare Agents; D015386:Hazardous Substances