Mold Remediation & Safety Standards Flashcards
7 cards from real CMA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Mold Remediation & Safety Standards flashcards as text
According to the EPA and IICRC S520 standard, what is the minimum recommended air pressure differential that must be maintained in a mold remediation containment zone relative to adjacent areas?
Answer: -0.02 inches water column (negative pressure)
Negative pressure of at least -0.02 inches water column prevents contaminated air from migrating out of the containment area.
Which respirator class is the minimum level of protection required when disturbing mold-contaminated materials during a large remediation project (>100 sq ft) per OSHA guidelines?
Answer: Half-face air-purifying respirator with P100 filters
OSHA and IICRC S520 recommend a minimum of a half-face air-purifying respirator with P100 particulate filters for large mold remediation projects.
A post-remediation verification (PRV) air sample result shows 350 spores/m³ of Aspergillus/Penicillium in the remediated room and 400 spores/m³ outdoors. How should this result be interpreted?
Answer: Remediation passed because indoor levels are lower than or comparable to outdoor levels
Post-remediation success is judged by comparing indoor spore counts to outdoor baseline levels; indoor counts equal to or lower than outdoor counts indicate successful remediation.
During remediation, workers discover asbestos-containing ceiling tiles mixed with mold-contaminated materials. What is the FIRST correct action?
Answer: Stop work, secure the area, and notify a licensed asbestos abatement contractor
When asbestos is discovered, work must stop immediately and a licensed asbestos abatement professional must handle removal before mold remediation resumes.
Which disposal method is required for mold-contaminated porous building materials removed during remediation per most state and EPA guidelines?
Answer: Double-bagged in 6-mil polyethylene bags sealed before transport through clean areas
Mold-contaminated materials must be double-bagged in 6-mil poly bags and sealed before being transported through clean areas to prevent cross-contamination.
What is the primary purpose of a critical barrier in a mold remediation containment setup?
Answer: To isolate the work area from unaffected building spaces and prevent cross-contamination
A critical barrier physically separates the contaminated work area from clean building spaces, preventing the spread of mold spores during remediation activities.
A remediation contractor proposes applying a biocide to mold-contaminated drywall as the sole remediation method without physical removal. Which statement best describes this approach?
Answer: This is insufficient because dead mold spores still pose an allergen risk and physical removal is required
Dead mold spores retain allergenic and potentially toxic properties, so physical removal of contaminated porous materials is required, not just biocide application.