A good time to update preincident survey information on a specific structure is:

Updating preincident survey information is crucial for ensuring accurate and relevant data is available for emergency response. One of the most critical times to update this information is during a change of occupancy. When a building undergoes a change in its primary use, it may involve different hazards, configurations, and vulnerabilities than those assessed during the previous occupancy. This change can significantly impact how firefighters and first responders approach an incident at that location.

For instance, a commercial building that changes from a retail space to a warehouse will have different fire risks, exits, and possibly hazardous materials present. As such, the preincident survey must be revisited to reflect these new conditions and ensure that first responders have the most current information to operate effectively and safely.

Updating data during a major renovation, while important, does not encompass all potential scenarios as comprehensively as updating it with a change in occupancy, which could involve changes in layout, materials, and overall building protocols. The timeframes for record reviews and maximum ten-year periods do not adequately address the necessity of immediate information updates triggered by occupancy changes.