Which of the following best describes a "Tier 2" response according to the ERG?

A "Tier 2" response according to the Emergency Response Guidebook (ERG) refers to incidents that present a moderate risk level and necessitate the deployment of additional resources. This classification indicates that while the situation is serious enough that a coordinated response is needed, it does not imply an immediate or severe threat to life or property that would trigger a higher tier response.

In these scenarios, responders assess the risks involved and implement measures to control the situation, often requiring specialized equipment, personnel, or procedures beyond what might typically be available at the site of the incident. The Tier 2 classification is critical because it helps emergency responders determine the level of action required and allocate the appropriate resources effectively.

The other available options represent responses that do not align with the specific criteria defining a Tier 2 response. Responses that do not require immediate action suggest a lower urgency than what is identified in Tier 2 incidents. Responses limited strictly to biological hazards do not encompass the broader spectrum of moderate risks that Tier 2 addresses. Lastly, community outreach programs, while valuable in many circumstances, are typically not categorized under emergency response tiers, as they do not directly pertain to the immediate management of hazardous incidents.