CMA Mold Remediation & Safety Standards 2

Question 1

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?

Accepted Answer

-0.02 inches water column (negative pressure)

Answer

Negative pressure of at least -0.02 inches water column prevents contaminated air from migrating out of the containment area.

Question 2

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?

Accepted Answer

Half-face air-purifying respirator with P100 filters

Answer

OSHA and IICRC S520 recommend a minimum of a half-face air-purifying respirator with P100 particulate filters for large mold remediation projects.

Question 3

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?

Accepted Answer

Remediation passed because indoor levels are lower than or comparable to outdoor levels

Answer

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.

Question 4

During remediation, workers discover asbestos-containing ceiling tiles mixed with mold-contaminated materials. What is the FIRST correct action?

Accepted Answer

Stop work, secure the area, and notify a licensed asbestos abatement contractor

Answer

When asbestos is discovered, work must stop immediately and a licensed asbestos abatement professional must handle removal before mold remediation resumes.

Question 5

Which disposal method is required for mold-contaminated porous building materials removed during remediation per most state and EPA guidelines?

Accepted Answer

Double-bagged in 6-mil polyethylene bags sealed before transport through clean areas

Answer

Mold-contaminated materials must be double-bagged in 6-mil poly bags and sealed before being transported through clean areas to prevent cross-contamination.

(CMA) Certified Mold Assessor Practice Test

(CMA) Certified Mold Assessor Practice Test

CMA Mold Remediation & Safety Standards 2