What are the three control options at hazmat incidents?

• A. Isolation
• B. Non-Intervention, Defensive, Offensive
• C. Public Protection
• D. Mitigation

Answer: (B)

When handling hazmat incidents, responders think in terms of three broad control options that define how aggressively they intervene. The first is non-intervention, which means staying outside the most hazardous area and focusing on protecting people and property from a safe distance. This involves establishing exclusion zones, evacuating or sheltering in place as needed, and using monitoring to guide longer-term actions without directly engaging the source.

The second option is defensive operations. Here the goal is to prevent the hazard from spreading and to protect exposures while still not approaching the source. Tactics include creating barriers and containment to keep the plume or substance from reaching people, cooling containers from a distance, and handling the incident in ways that minimize risk to responders and the public while you manage the spread.

The third option is offensive operations. This is active mitigation at the source when it can be done safely. It involves direct actions to stop the release or neutralize the hazard at its origin, such as closing valves, stopping flows, or applying corrective measures with appropriate equipment and trained personnel. This level of intervention carries the highest risk and requires thorough risk assessment, specialized teams, and precise coordination.

These three modes—non-intervention, defensive, and offensive—together form the standard framework for choosing tactics based on hazard, risk, and resources. Other terms like isolation, broad public protection, or general mitigation describe outcomes or specific actions, but they aren’t the three control options themselves.