Introduction to Creating a Clean Air Environment

Final clearance is a critical step in any air quality remediation project. It confirms that contamination levels are back to acceptable limits and that the area is safe for re-occupancy.

Key Principles
Final clearance must be carried out by an independent party — under Australian (AS/NZS) guidelines, the same contractor cannot approve their own remediation work
Clearance should only begin after all remediation activities and visual inspections are fully completed
Standards such as IICRC S520 (mould) and S500 (water damage) define the criteria for successful clearance

Practical Steps
Confirm that all visible contamination has been completely removed before testing
Ensure containment is still in place and negative pressure is maintained during the pre-clearance stage
Document that the full remediation scope has been completed before arranging clearance testing

Failure to pass clearance can lead to delays and additional remediation costs. Setting clear expectations and approval criteria with clients at the start of the project helps avoid disputes.