What should responders do if they encounter an unknown substance at a scene?

When responders encounter an unknown substance at a scene, the prudent course of action is to assume that the substance is hazardous and to follow proper containment procedures. This approach is grounded in the principle of safety for both the responders and the public. An unknown substance may pose significant risks, including toxicity, flammability, or other dangerous properties, which are not always immediately apparent.

By assuming the substance is hazardous, responders can implement protective measures to safeguard themselves, coworkers, and anyone nearby. This includes wearing appropriate personal protective equipment (PPE), utilizing containment methods to prevent the spread or exposure, and initiating emergency protocols to assess and mitigate the risk. Recognizing the potential dangers inherent in unknown substances underscores the importance of a cautious and systematic approach to hazardous materials incidents.

Other approaches, such as ignoring the substance or assuming it is benign, could lead to dangerous situations, including exposure to toxic materials or the escalation of a hazardous incident. Contacting an expert without taking initial action could result in increased risk while waiting for guidance. Hence, taking proactive and precautionary measures is essential in ensuring safety in the face of uncertainty.