What should be done first when a hazardous materials spill occurs?

When a hazardous materials spill occurs, isolating the area and evacuating personnel is the first priority. This action helps prevent exposure and protects individuals from potential health hazards posed by the spilled materials. By cordoning off the area, you ensure that non-essential personnel stay away from the danger zone, which is crucial for maintaining safety and minimizing risks during the response efforts.

Once the area is secured, it becomes possible to assess the situation accurately and notify authorities as needed. Immediate cleanup could inadvertently put responders at risk if they are not aware of the specific hazards involved. The assessment of materials is equally important, but it should not be the first step taken; it comes after ensuring everyone is safely evacuated and the area is contained. This sequence of actions is vital in effective emergency response to hazardous material incidents.