CMA Post-Remediation Verification & Clearance Testing

Question 1

What is the primary purpose of post-remediation verification (PRV)?

Accepted Answer

To confirm that remediation was successful and the area is safe for reoccupancy

Answer

To document the cost of remediation work

Answer

To identify the source of moisture intrusion

Answer

To determine the species of mold present before remediation

Question 2

Which organization's guidelines are most commonly referenced for post-remediation clearance criteria in the United States?

Accepted Answer

IICRC S520 Standard and Reference Guide for Professional Mold Remediation

Answer

OSHA (Occupational Safety and Health Administration)

Answer

EPA National Ambient Air Quality Standards

Answer

NIOSH Manual of Analytical Methods

Question 3

When should post-remediation verification air sampling be conducted relative to remediation activities?

Accepted Answer

After the work area has been cleaned and containment is still in place but before it is removed

Answer

During active remediation to monitor progress

Answer

Before remediation begins to establish a baseline

Answer

Only after containment has been completely dismantled and the area has aired out

Question 4

What is the standard outdoor control (background) sample used for during post-remediation clearance testing?

Accepted Answer

To provide a baseline comparison for indoor air sample results

Answer

To measure humidity levels outside the building

Answer

To document the type of mold found in the surrounding environment

Answer

To calibrate the air sampling pump before indoor sampling

Question 5

Which of the following visual criteria must be met before air sampling during post-remediation verification?

Accepted Answer

No visible mold growth, dust, or debris should be present in the remediated area

Answer

Walls must be repainted to cover any staining

Answer

Replacement building materials must be fully installed

Answer

HVAC filters must be replaced within 24 hours of the inspection

Question 6

Who is generally qualified to perform post-remediation verification in states with mold assessor licensing requirements?

Accepted Answer

A licensed mold assessor who is independent of the remediation contractor

Answer

The remediation contractor who performed the work

Answer

Any certified industrial hygienist regardless of mold-specific training

Answer

The building owner or their designated representative

Question 7

What type of air sampling media is most commonly used for post-remediation clearance testing?

Accepted Answer

Spore trap cassettes (e.g., Air-O-Cell, Zefon Bio-Pump Plus)

Answer

Bulk material samples collected from surfaces

Answer

Wipe samples collected with sterile swabs

Answer

Passive settling plates left open for 24 hours