IICRC S520 Mold Remediation Flashcards

IICRC S520 recommends that building occupants, especially those who are immunocompromised, should:

Answer: Be relocated away from the affected area until PRV confirms Condition 1

Vulnerable occupants should vacate and not return until post-remediation verification confirms the area is Condition 1.

Which IICRC S520 principle states that decisions about remediation scope should be based on field assessment rather than relying solely on sampling data?

Answer: The visual inspection priority principle

S520 emphasizes that visual inspection is the primary diagnostic tool and sampling supplements, not replaces, professional judgment.

Under IICRC S520, which of the following best describes 'Condition 2' in an indoor environment?

Answer: Settled spores, fungal fragments, or residuals from a Condition 3 area without active growth

Condition 2 indicates the presence of settled spores or fungal residuals from a contaminated source, without current visible colonization.

IICRC S520 guidance on HVAC systems affected by mold recommends:

Answer: Shutting down the HVAC system serving the affected area during remediation to prevent spore distribution

HVAC systems should be shut down in affected zones to prevent spores from being distributed throughout the building.

According to IICRC S520, written documentation of a mold remediation project should include which of the following?

Answer: Pre- and post-remediation photos, scope of work, materials removed, and PRV results

Thorough documentation including photos, scope, disposal records, and PRV results protects all parties and verifies work quality.

Which physical principle does IICRC S520 leverage when it specifies that negative air pressure should be maintained inside a containment zone?

Answer: Air flows from high pressure to low pressure zones

Since air flows from high to low pressure, negative pressure inside containment ensures air flows inward, preventing spores from escaping outward.

IICRC S520 classifies mold contamination remediation projects by condition level primarily to:

Answer: Guide the appropriate level of worker protection, containment, and remediation methods

The Condition 1/2/3 classification system drives the selection of appropriate PPE, containment type, and remediation procedures for each project.