Which of the following actions is NOT typically part of the initial response to a CBRN incident?

In the context of the initial response to a Chemical, Biological, Radiological, or Nuclear (CBRN) incident, the primary focus is on ensuring the safety of responders and the public, as well as assessing and managing the situation. Cleaning contaminated surfaces is typically not an immediate step in the initial response phase. Instead, responders prioritize establishing control measures, such as forming a containment zone to limit exposure and prevent further spread of contaminants.

Evacuating civilians, while crucial, depends on the situation's dynamics and is often part of the early response actions. Performing patient triage and treatment is essential for managing casualties who are exposed or affected, ensuring that those in the greatest need receive care promptly.

Immediate cleaning of contaminated surfaces could expose personnel to harmful materials and potentially spread contaminants, which could worsen the situation. Thus, it is typically reserved for later in the response process once the area has been secured, the threat assessed, and it is safe to proceed with decontamination procedures. This careful sequence of actions aligns with best practices in the management of hazardous situations.