CMI Remediation Protocols & Post-Remediation Verification Flashcards
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Read the first 6 CMI Remediation Protocols & Post-Remediation Verification flashcards as text
What are the two types of samples most commonly collected during post-remediation verification (PRV)?
Answer: Air samples and surface samples from the remediated area and an unaffected reference area
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.
Before post-remediation air sampling is conducted, what condition must the work area meet?
Answer: All visible mold must be removed, surfaces cleaned, containment barriers still in place, and air settled for a period
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.
If post-remediation verification sampling shows mold levels higher than outdoor reference samples, what is the appropriate action?
Answer: Perform additional remediation and cleaning, then re-test
Elevated mold levels above outdoor reference after remediation indicate incomplete work; additional remediation and re-testing are required until clearance criteria are met.
What is an 'aggressive sampling' technique in post-remediation verification and why is it used?
Answer: Disturbing surfaces with a leaf blower or brush before air sampling to dislodge settled spores and stress-test the remediation
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.
Which document formalizes the results of post-remediation verification and is provided to the building owner?
Answer: Clearance report or post-remediation evaluation report issued by a qualified third-party inspector
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.
What is the primary reason a third party independent of the remediation contractor should conduct post-remediation verification?
Answer: To avoid a conflict of interest where a contractor might certify their own substandard work as complete
Third-party verification eliminates the conflict of interest inherent in a contractor certifying their own work, providing objective assurance to the building owner that remediation was successful.