Flood Restoration Mold Prevention and Remediation 2 — Questions and Answers
Question 1: What is the recommended post-remediation verification (PRV) test used to confirm mold remediation success?
- Air sampling and surface swab testing (Correct answer)
- Visual inspection only
- Moisture meter reading
- HEPA vacuum test
Correct answer: Air sampling and surface swab testing
Post-remediation verification combines air sampling and surface swab tests analyzed by a certified laboratory to confirm that mold levels have returned to normal.
Question 2: What is the acceptable indoor mold spore count relative to outdoor levels in a successfully remediated building?
- Indoor levels should be equal to or lower than outdoor levels (Correct answer)
- Indoor levels should be zero
- Indoor levels can be up to 50% higher than outdoor
- Indoor levels should be below 500 spores per cubic meter
Correct answer: Indoor levels should be equal to or lower than outdoor levels
A successfully remediated building should have indoor mold spore counts that are at or below outdoor baseline levels, indicating no active indoor mold source.
Question 3: Which building material is most likely to require removal rather than cleaning when contaminated with mold after a flood?
- Drywall with paper facing (Correct answer)
- Ceramic tile
- Concrete block
- Metal studs
Correct answer: Drywall with paper facing
Drywall with paper facing is porous and mold penetrates the paper and gypsum core, making cleaning ineffective and removal necessary.
Question 4: What is the purpose of an encapsulant in mold remediation?
- Seal treated surfaces to prevent future mold growth (Correct answer)
- Kill active mold colonies
- Neutralize mycotoxins
- Test surfaces for mold presence
Correct answer: Seal treated surfaces to prevent future mold growth
Encapsulants are applied after antimicrobial treatment to seal porous surfaces, creating a barrier that inhibits future mold colonization.
Question 5: At what relative humidity level does mold growth become inhibited indoors?
- Below 60% relative humidity (Correct answer)
- Below 80% relative humidity
- Below 40% relative humidity
- Below 70% relative humidity
Correct answer: Below 60% relative humidity
Maintaining indoor relative humidity below 60% deprives mold of the moisture it needs to grow and colonize building materials.
Question 6: What is the IICRC's category classification for floodwater containing raw sewage?
- Category 3 (Correct answer)
- Category 2
- Category 1
- Category 4
Correct answer: Category 3
Category 3 water, also called black water, contains raw sewage, pathogens, and highly toxic substances, requiring the most stringent remediation protocols.
Flood Restoration Mold Prevention and Remediation 2
What is the recommended post-remediation verification (PRV) test used to confirm mold remediation success?