Which items are included in the interior containment requirement to fully enclose the work area?

Which items are included in the interior containment requirement to fully enclose the work area?

• A. Windows
• B. Doors
• C. Vents
• D. All of these

Answer: (D)

Interior containment aims to prevent lead dust from spreading beyond the work area by creating a sealed barrier around every potential path from that space. To truly enclose the area, you must address all openings that could carry dust or permit air flow. Windows are covered with plastic to block gaps, doors are sealed or wrapped to form a continuous barrier, and vents or HVAC openings are shut off or covered so air can’t move dust in or out. If any one of these is left unsealed, dust can migrate to adjacent spaces through that route. Because all of these features need to be controlled, the correct approach includes windows, doors, and vents—so all of these are included in interior containment.

Interior containment aims to prevent lead dust from spreading beyond the work area by creating a sealed barrier around every potential path from that space. To truly enclose the area, you must address all openings that could carry dust or permit air flow. Windows are covered with plastic to block gaps, doors are sealed or wrapped to form a continuous barrier, and vents or HVAC openings are shut off or covered so air can’t move dust in or out. If any one of these is left unsealed, dust can migrate to adjacent spaces through that route. Because all of these features need to be controlled, the correct approach includes windows, doors, and vents—so all of these are included in interior containment.