Mold Remediation Techniques and Procedures Flashcards

When remediating a large mold-contaminated area (>100 sq ft), what type of containment is typically required?

Answer: Full containment with negative air pressure and airlock entry

Large mold remediation projects require full containment with negative air pressure and an airlock entry to prevent cross-contamination to unaffected areas.

Which HEPA vacuum filter efficiency is required for mold remediation work?

Answer: 99.97% efficiency at 0.3 microns

HEPA filters used in mold remediation must capture 99.97% of particles at 0.3 microns to effectively capture mold spores.

After physically removing mold-contaminated materials, what is the next critical step before applying antimicrobial treatments?

Answer: Damp wipe and HEPA vacuum all affected surfaces

Damp wiping and HEPA vacuuming removes residual mold spores and debris from surfaces before any antimicrobial treatment is applied.

What does a negative air machine do during mold remediation containment?

Answer: Creates negative pressure to pull air through HEPA filters before exhausting

A negative air machine creates negative pressure inside the containment zone, drawing air through HEPA filters before exhausting it outside, preventing spore migration.

When demolishing mold-contaminated drywall, workers should use which cutting technique to minimize spore dispersal?

Answer: Scoring and snapping after misting with water

Scoring and snapping drywall after misting with water minimizes dust and aerosolized spore dispersal compared to power cutting.

What is the correct method for disposing of mold-contaminated materials removed during remediation?

Answer: Double-bag in 6-mil polyethylene bags and seal before disposal

Mold-contaminated materials must be double-bagged in 6-mil polyethylene bags, sealed, and disposed of as regulated waste to prevent further contamination.

Which parameter must be controlled to prevent mold recurrence after remediation of a water-damaged building?

Answer: Relative humidity maintained below 60%

Maintaining relative humidity below 60% (ideally below 50%) is the primary environmental control that prevents mold regrowth after remediation.