Mold Remediation Techniques and Procedures Flashcards

What is the correct air exchange rate recommendation for a negative air machine in a remediation containment zone?

Answer: 4-6 air changes per hour

Negative air machines should provide 4-6 air changes per hour within the containment zone to maintain effective negative pressure and air quality.

When using dry ice blasting for mold remediation on structural lumber, what is a key advantage over conventional methods?

Answer: It kills mold spores with sub-zero temperatures on contact and leaves no secondary waste

Dry ice blasting removes mold from structural wood without adding moisture and the dry ice sublimates, leaving no secondary waste to clean up.

A remediator discovers mold behind a wall cavity during initial demolition that is significantly larger than initially assessed. What is the correct course of action?

Answer: Stop work, expand containment, reassess scope, and notify the client before proceeding

Work must stop when scope significantly changes; containment must be expanded, the new scope assessed, and the client notified before continuing.

Which type of air sampling method collects mold spores on a culture medium to identify viable (living) mold?

Answer: Impaction sampling onto an agar plate (viable culture)

Viable culture sampling using impaction onto agar plates collects living mold spores that can be cultured and identified, unlike spore trap methods that capture all spores.

What is the recommended approach for remediating mold on concrete block walls in a basement?

Answer: Wire brush, HEPA vacuum, apply biocide, allow to dry, then encapsulate if needed

Concrete block requires mechanical scrubbing with a wire brush, HEPA vacuuming, biocide application, thorough drying, and encapsulation for severely affected areas.

What does the term 'condition 1' describe in the IICRC S520 standard for mold remediation?

Answer: Normal fungal ecology where no contamination is present

Condition 1 in the IICRC S520 standard describes a normal fungal ecology where mold spore types and counts are typical of an unaffected indoor environment.

During mold remediation of a commercial kitchen, which additional hazard must the remediator consider that differs from typical residential jobs?

Answer: Presence of food-borne pathogens combined with mold in grease-laden environments

Commercial kitchens present a combined hazard of mold and food-borne pathogens growing in grease-laden surfaces, requiring additional decontamination protocols.