What is a re-entry plan, and what should it include after a hazardous materials incident?

• A. A plan for safe return of residents to an area; includes clearance criteria, decontamination, monitoring, and communication.
• B. A plan for evacuating residents to shelters with no decontamination.
• C. A plan for distributing vaccines post-incident.
• D. A plan for online incident reporting.

Answer: (A)

Re-entry planning after a hazardous materials incident is about ensuring residents can return safely. It should establish clearance criteria that must be met before people are allowed back in, based on environmental and decontamination data. It needs to spell out how decontamination will be performed for residents, responders, and any affected equipment or facilities to remove contamination and prevent spread. It should specify how monitoring will be conducted to confirm ongoing safety—such as environmental air and surface sampling and any required health surveillance. It also should outline how information will be communicated—what conditions exist, what protective actions are required, who authorizes re-entry, and when decisions will be updated. These elements work together to support a controlled, informed, and safe return.

The other options describe activities that aren’t about returning to a potentially contaminated area: evacuating to shelters without decontamination, distributing vaccines after the incident, or online incident reporting.