Containment & Isolation Procedures Flashcards

What is the correct sequence for removing a temporary containment after remediation is complete and clearance has been passed?

Answer: HEPA vacuum all surfaces, fold poly inward to contain debris, then bag and remove

Surfaces should be HEPA vacuumed before teardown, and poly sheeting folded inward to encapsulate debris before bagging, minimizing re-dispersal of spores.

In a containment scenario where a window must be used as the NAM exhaust port, what additional precaution is required?

Answer: Seal around the exhaust duct in the window opening to prevent bypass air infiltration

Any gaps around the exhaust duct at the window must be sealed to prevent outdoor air — or exhausted air — from bypassing the containment barrier.

Which situation would most likely require a decontamination (decon) unit or anteroom in addition to a standard airlock?

Answer: Large-scale remediation with gross contamination and high spore counts

Decon units with shower facilities are required on large-scale or heavily contaminated projects where workers need full body decontamination before leaving the work zone.

How should electrical outlets and switch plates inside a containment zone be treated?

Answer: Sealed with poly sheeting and tape to prevent spore infiltration into wall cavities

Outlets and switch plates are openings into wall cavities that can allow spores to spread; they must be sealed with poly and tape as part of the critical barrier.

A project requires containment in a room with a drop ceiling. What is the appropriate approach to the drop ceiling tiles?

Answer: Remove tiles and seal the grid and deck above with poly to form a true ceiling barrier

Drop ceiling tiles are not airtight; the plenum above them must be isolated by sealing the deck with poly sheeting to create a true containment ceiling.

During remediation in an occupied building, which method best protects occupants from spore exposure in adjacent areas?

Answer: Maintaining negative pressure containment and staggering work schedules with occupant presence

Negative pressure containment physically prevents spore migration, and scheduling coordination minimizes occupant exposure during high-activity periods.

What does the term 'critical barrier' specifically refer to in mold remediation containment?

Answer: The sealed poly sheeting that separates the contaminated work area from clean areas

A critical barrier is the sealed polyethylene sheeting enclosure that physically separates the contaminated remediation zone from clean occupied spaces.