Which of the following sources should be contacted for guidance during a hazardous materials incident?

The Canadian Transport Emergency Centre (CTEC) is specifically designed to provide immediate assistance during hazardous materials incidents, particularly those involving transportation-related hazards. CTEC operates a 24/7 hotline that offers guidance and support in assessing the risks associated with different types of hazardous materials, including the proper handling and containment methods. This source is highly valuable during emergency responses as they have access to critical information about the nature of the materials involved, their potential risks, and best practices for response.

While other organizations like the National Fire Protection Association, Environmental Protection Agency, and Department of Homeland Security have important roles in safety standards, environmental protection, and national security, respectively, CTEC is directly focused on addressing immediate needs during hazardous materials transportation emergencies. Therefore, reaching out to them ensures that responders receive the most relevant and timely information necessary for effective incident management.