First of all, never let the remediation contractor provide post-remediation and testing to ensure that remediation was successful. This is a conflict of interest and unethical. The post-remediation verification is provided in several steps and suggested to be performed by a certified professional:
- Visual inspection to ensure specifications were followed, moisture source identified and corrected, contents and debris removed, visible mold removed, work area dust free total spore concentration less than typical normal fungal ecology
- Is the total spore concentration of the affected area less than comparison sample (outdoors or unaffected area of building)?
- Is the level of each fungal type less than the comparison sample?
- Is the area acceptable for removal of containment barriers and occupancy?