CMI CMI Remediation Protocols & Post-Remediation Verification 2

Question 1

What are the two types of samples most commonly collected during post-remediation verification (PRV)?

Accepted Answer

Air samples and surface samples from the remediated area and an unaffected reference area

Answer

PRV typically involves both air sampling (spore trap cassettes) and surface sampling (swab or tape lift) from remediated areas, compared against reference samples from unaffected areas.

Question 2

Before post-remediation air sampling is conducted, what condition must the work area meet?

Accepted Answer

All visible mold must be removed, surfaces cleaned, containment barriers still in place, and air settled for a period

Answer

PRV air sampling should occur after completion of remediation and cleaning, with containment still in place, and after sufficient time for disturbed particles to settle from the air.

Question 3

If post-remediation verification sampling shows mold levels higher than outdoor reference samples, what is the appropriate action?

Accepted Answer

Perform additional remediation and cleaning, then re-test

Answer

Elevated mold levels above outdoor reference after remediation indicate incomplete work; additional remediation and re-testing are required until clearance criteria are met.

Question 4

What is an 'aggressive sampling' technique in post-remediation verification and why is it used?

Accepted Answer

Disturbing surfaces with a leaf blower or brush before air sampling to dislodge settled spores and stress-test the remediation

Answer

Aggressive sampling involves mechanical disturbance of remediated surfaces before air sampling to dislodge any residual spores, providing a more sensitive and reliable assessment of remediation completeness.

Question 5

Which document formalizes the results of post-remediation verification and is provided to the building owner?

Accepted Answer

Clearance report or post-remediation evaluation report issued by a qualified third-party inspector

Answer

A written clearance or post-remediation evaluation report from a qualified, independent inspector documents sampling results, methods, laboratory analysis, and clearance determination for the building owner.

(CMI) Certified Mold Inspector Practice Test

(CMI) Certified Mold Inspector Practice Test

CMI CMI Remediation Protocols & Post-Remediation Verification 2