What is the primary method for identifying a hazardous material during an incident?

The primary method for identifying a hazardous material during an incident is checking placards or labels. These visual indicators are often found on transport vehicles, containers, and buildings, providing critical information about the substances they hold. Placards and labels are standardized and designed to quickly communicate the type of hazardous material and relevant safety information, including any necessary precautions for responders. This method is vital because it offers immediate insight into what responders may be dealing with, enabling them to take appropriate safety measures and precautions in a timely manner.

While other methods, such as using a chemical analysis kit or observing the behavior of the material, can provide valuable information, they may take longer or require specialized equipment that might not be immediately available at the scene. Using a thermal imaging camera is helpful for detecting heat but does not identify the specific nature of any hazardous materials present. Therefore, while those methods can be useful in specific situations, checking placards or labels remains the most direct and efficient approach for quick identification in emergency scenarios.