Containment, Controlled Demolition and Material Removal Flashcards

When performing a flood cut on water-damaged drywall, where is the cut typically made?

Answer: At least 12 inches above the highest point of measured moisture wicking

Cutting above the highest measured wicking point ensures all wet and potentially contaminated material is removed.

Before beginning controlled demolition in a home built before 1978, what must a technician consider first?

Answer: The possibility of lead-based paint requiring EPA RRP-compliant work practices

The EPA Renovation, Repair and Painting Rule applies to disturbing painted surfaces in pre-1978 housing.

Which material is most commonly recommended for constructing temporary containment barriers?

Answer: Fire-retardant polyethylene sheeting, typically 6-mil

Polyethylene sheeting (often 6-mil, fire-retardant) is durable, impermeable and standard for containment.

What is the main purpose of establishing negative air pressure inside a containment area?

Answer: To keep contaminants from migrating into unaffected areas

Negative pressure ensures air flows into, not out of, the containment, preventing contaminant spread.

Wet carpet cushion (pad) affected by Category 3 water should generally be handled how?

Answer: Removed and discarded

Porous carpet cushion contaminated with Category 3 water cannot be adequately decontaminated and is removed.

Which device is placed in a containment to filter airborne particulates and create negative pressure when ducted outside?

Answer: HEPA-filtered air filtration device (AFD)

A HEPA air filtration device exhausted outside the containment both cleans air and produces negative pressure.

Before cutting into a wall during controlled demolition, which step reduces the risk of hitting hidden hazards?

Answer: Checking for electrical wiring, plumbing and gas lines and de-energizing circuits as needed

Identifying utilities and shutting off power prevents shocks and damage to hidden services.