Final answer:
The ERG refers to the Protective Action Zone (PAZ) as the area downwind of a spill where steps must be taken to protect the public.
Step-by-step explanation:
The ERG (Emergency Response Guidebook) refers to the Protective Action Zone as the area downwind of the spill or leak where steps must be taken to protect the public. The PAZ is a specific zone established by emergency responders to ensure the safety of individuals in the vicinity of a hazardous material release.
For example, in the case of a chemical spill, the PAZ might include the area where the toxic fumes could spread, and actions such as evacuations, sheltering in place, or the use of personal protective equipment may be necessary.
The ERG is a resource utilized by emergency responders to determine the appropriate actions to take in hazardous material incidents.