Which Class uses temporary measures such as plastic sheeting and tape to seal portions of the building?

• A. Class 3 Expedient
• B. Class 4 Secondary Enclosure
• C. Class 5 Shelter in Place
• D. Class 2 Partial Integration

Answer: (A)

The idea being tested is using quick, improvised containment within a building by creating a temporarily sealed zone with readily available materials. This approach relies on speed and simplicity rather than permanence, using items like plastic sheeting and tape to seal off portions of the structure to limit contaminant ingress while more robust protections are planned or enacted later. That makes Class 3 Expedient the best fit, as it is specifically about fast, improvised barriers to establish a controlled area inside a building.

In contrast, a secondary enclosure involves a more substantial, constructed barrier to create a separate space, not just a temporary patch. Shelter in place focuses on keeping people inside the building to reduce exposure, which may include sealing openings but is not about creating a localized, temporary sealed zone within the structure. Partial integration suggests integrating with existing building systems in a partial way, rather than deploying quick, improvised barriers.