CMI CMI Remediation Protocols & Post-Remediation Verification

Question 1

According to the IICRC S520 standard, what are the three primary remediation levels based on contamination area?

Accepted Answer

Level 1 (≤10 sq ft), Level 2 (10–100 sq ft), Level 3 (>100 sq ft)

Answer

Level 1 (≤25 sq ft), Level 2 (25–200 sq ft), Level 3 (>200 sq ft)

Answer

Level 1 (≤5 sq ft), Level 2 (5–50 sq ft), Level 3 (>50 sq ft)

Answer

Levels are determined by mold species, not area

Question 2

What is the purpose of establishing 'containment' during mold remediation?

Accepted Answer

To prevent cross-contamination of mold spores to unaffected areas during the disturbance of mold growth

Answer

To keep remediation workers inside the work area at all times

Answer

To allow biocides to reach higher concentrations within the work zone

Answer

Containment is only required for Stachybotrys, not for other mold species

Question 3

What is the role of negative air pressure inside a remediation containment area?

Accepted Answer

To ensure air flows from clean areas into the containment zone rather than from the contaminated zone outward

Answer

To increase the biocide concentration within the work area

Answer

To reduce the need for PPE by containing spores to floor level

Answer

Negative pressure is only relevant in hospital isolation rooms, not mold remediation

Question 4

Which piece of equipment is used to create and maintain negative air pressure inside a mold remediation containment area?

Accepted Answer

HEPA-filtered negative air machine (NAM)

Answer

Standard box fan exhausting outward

Answer

Central HVAC system set to maximum return

Answer

Ozone generator

Question 5

According to best practices, should biocides (e.g., bleach) be used as the primary remediation method for mold on porous materials?

Accepted Answer

No — biocides do not penetrate porous materials adequately; physical removal is required

Answer

Yes — EPA-registered biocides are the only compliant remediation method

Answer

Yes — bleach kills all mold species and leaves surfaces permanently protected

Answer

Biocides are only prohibited in residences, not in commercial buildings

Question 6

What does 'post-remediation verification' (PRV) testing confirm?

Accepted Answer

That the remediated area has been returned to a condition of normal fungal ecology comparable to an unaffected reference area

Answer

That 100% of mold spores have been eliminated from the entire building

Answer

That all biocide residues have been removed from surfaces

Answer

PRV is a legal requirement only in commercial buildings