IICRC MRS MOLD REMEDIATION TEST
GUIDE.
Containment - ANS To prevent cross-contamination- Containment is critical in preventing the
spread of mold spores to unaffected areas, thus managing cross-contamination.
Pressure differential during remediation - ANS Negative pressure of 0.05 inches of water
column
Containment barrier material - ANS 6-mil polyethylene sheeting
Airborne spores control method - ANS High-efficiency particulate air (HEPA) filtering
Best practice for removing contaminated materials - ANS Gently cutting and removing to
minimize dust
Air monitoring timing - ANS Throughout the project
Recommended respirator for mold removal - ANS P100 respirator
Effective cleaning agents against mold - ANS Household detergent, Vinegar, Sodium
hypochlorite (bleach). While household detergent and vinegar have some efficacy, sodium
hypochlorite is widely used due to its effectiveness against mold, although it should be used
properly.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Critical factor to prevent mold growth in water-damaged buildings - ANS Humidity control
Strategy for managing mold on porous materials - ANS Removal and disposal - Porous
materials such as carpets can trap mold spores and are often best removed and replaced.
Significance of establishing negative air pressure in containment - ANS To prevent external
pollutants from entering:Establishing negative air pressure prevents external pollutants and
mold spores from entering the containment area, protecting the cleanup effort.
Non-indicator of mold infestation - ANS High levels of UV light - High levels of UV light are not
an indicator of mold infestation, whereas visible mold, musty odors, and water stains are
consistent signs.
Containment system for larger remediation projects - ANS Negative pressure containment -
Negative pressure containment effectively manages larger areas and keeps mold spores
contained during remediation.
Role of a dehumidifier in remediation - ANS It reduces humidity to inhibit mold growth -
Dehumidifiers reduce humidity levels, inhibiting the growth of mold by providing a less
favorable environment.
Scenario for employing bio-remediation - ANS When physical removal is impractical - Bio-
remediation uses microbial action to break down complex mold spores when physical removal is
challenging.
First step in mold remediation - ANS Not specified in the provided notes.
Assess the extent of water damage - ANS Assessing the extent of water damage is essential
to determine the necessary remediation measures and containment requirements.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
GUIDE.
Containment - ANS To prevent cross-contamination- Containment is critical in preventing the
spread of mold spores to unaffected areas, thus managing cross-contamination.
Pressure differential during remediation - ANS Negative pressure of 0.05 inches of water
column
Containment barrier material - ANS 6-mil polyethylene sheeting
Airborne spores control method - ANS High-efficiency particulate air (HEPA) filtering
Best practice for removing contaminated materials - ANS Gently cutting and removing to
minimize dust
Air monitoring timing - ANS Throughout the project
Recommended respirator for mold removal - ANS P100 respirator
Effective cleaning agents against mold - ANS Household detergent, Vinegar, Sodium
hypochlorite (bleach). While household detergent and vinegar have some efficacy, sodium
hypochlorite is widely used due to its effectiveness against mold, although it should be used
properly.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Critical factor to prevent mold growth in water-damaged buildings - ANS Humidity control
Strategy for managing mold on porous materials - ANS Removal and disposal - Porous
materials such as carpets can trap mold spores and are often best removed and replaced.
Significance of establishing negative air pressure in containment - ANS To prevent external
pollutants from entering:Establishing negative air pressure prevents external pollutants and
mold spores from entering the containment area, protecting the cleanup effort.
Non-indicator of mold infestation - ANS High levels of UV light - High levels of UV light are not
an indicator of mold infestation, whereas visible mold, musty odors, and water stains are
consistent signs.
Containment system for larger remediation projects - ANS Negative pressure containment -
Negative pressure containment effectively manages larger areas and keeps mold spores
contained during remediation.
Role of a dehumidifier in remediation - ANS It reduces humidity to inhibit mold growth -
Dehumidifiers reduce humidity levels, inhibiting the growth of mold by providing a less
favorable environment.
Scenario for employing bio-remediation - ANS When physical removal is impractical - Bio-
remediation uses microbial action to break down complex mold spores when physical removal is
challenging.
First step in mold remediation - ANS Not specified in the provided notes.
Assess the extent of water damage - ANS Assessing the extent of water damage is essential
to determine the necessary remediation measures and containment requirements.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
