CMA Post-Remediation Verification & Clearance Testing 2

Question 1

What does a successful clearance determination in post-remediation verification indicate?

Accepted Answer

That mold conditions in the remediated area are similar to or below outdoor background levels

Answer

That no mold spores are present anywhere in the building

Answer

That the building's moisture problem has been permanently resolved

Answer

That the property is guaranteed mold-free for a period of one year

Question 2

If post-remediation verification sampling fails to meet clearance criteria, what must happen next?

Accepted Answer

Additional remediation must be performed, followed by repeat verification sampling

Answer

The mold assessor must recommend the building be condemned

Answer

The results should be averaged with the original pre-remediation samples

Answer

A new mold assessor must be hired to conduct a second clearance test

Question 3

Which laboratory analysis method provides genus- and species-level identification of mold in air samples, rather than just spore counts?

Accepted Answer

Culture (viable) analysis using malt extract agar

Answer

Spore trap analysis by direct microscopy

Answer

Fiber analysis using phase contrast microscopy

Answer

Beta-glucan ELISA testing

Question 4

What is the minimum recommended volume of air typically collected per spore trap sample during clearance testing?

Accepted Answer

75 liters

Answer

5 liters

Answer

25 liters

Answer

150 liters

Question 5

How should HVAC systems be handled prior to collecting post-remediation clearance air samples?

Accepted Answer

HVAC should be operating normally so conditions represent typical occupancy

Answer

HVAC should be running at maximum speed to circulate air throughout the building

Answer

HVAC should be shut off and sealed during sampling to prevent dilution of contaminants

Answer

HVAC filters should be removed before sampling to increase airflow

Question 6

Which of the following is an example of a surface sampling method used during post-remediation verification?

Accepted Answer

Tape lift or swab sample collected from a cleaned surface

Answer

Spore trap air cassette sampling

Answer

Passive air sampling using an open Petri dish

Answer

ERMI (Environmental Relative Moldiness Index) dust sampling

Question 7

Which of the following conditions would typically cause a post-remediation clearance test to be postponed?

Accepted Answer

Visible moisture or ongoing water intrusion is still present in the remediated area

Answer

The outdoor temperature is below 50°F

Answer

The building has been unoccupied for more than 30 days

Answer

The laboratory turnaround time exceeds 5 business days