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

Blood samples from occupants and surface swabs from visible mold

Answer

Bulk material samples and HVAC duct tape lift samples only

Answer

Only air samples; surface samples are not used in PRV

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

Post-remediation sampling must occur while active remediation work continues

Answer

All containment must be removed and HVAC restored to normal operation before sampling

Answer

Post-remediation sampling is only valid if done within 24 hours of remediation completion

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

Declare remediation complete since indoor air is always somewhat different from outdoor

Answer

Increase the air changes in the HVAC system to dilute the reading

Answer

Accept the results if no visible mold remains

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

Using higher-volume air pumps to collect more spores per sample

Answer

Collecting multiple samples simultaneously from different areas

Answer

Aggressive sampling refers to testing within hours of remediation completion

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 verbal confirmation from the remediation contractor

Answer

The original work order signed by the remediation crew

Answer

A certificate from the local health department

Question 6

What is the primary reason a third party independent of the remediation contractor should conduct post-remediation verification?

Accepted Answer

To avoid a conflict of interest where a contractor might certify their own substandard work as complete

Answer

Third-party testing is cheaper than contractor self-testing

Answer

Only licensed engineers can conduct post-remediation verification

Answer

It is required by EPA law in all US states