Asbestos air monitoring

Air monitoring is required whenever there is a risk of airborne asbestos fibres. This typically includes asbestos removal, remediation and other activities where asbestos-containing materials are disturbed. It is also used for clearance purposes to confirm safe conditions before reoccupation and to demonstrate compliance with New Zealand asbestos regulations.

Yes, but the requirements depend on the type of removal being carried out.

• Class A removal (friable asbestos): Air monitoring is required, including control monitoring during removal and clearance monitoring to confirm fibre levels are safe before reoccupation.
• Class B removal (non-friable asbestos): Air monitoring is not always mandatory but is often recommended for higher-risk work, where dust generation is possible, or where required by the removal control plan or site conditions.

In all cases, monitoring helps demonstrate that controls are effective, workers are protected and the site can be safely handed back.

Yes. Independent monitoring provides an objective assessment of airborne asbestos levels and helps ensure results are unbiased, defensible and suitable for demonstrating compliance. This separation is particularly important for high-risk or regulated works.

Air monitoring involves collecting and analysing air samples to measure the concentration of airborne asbestos fibres. This helps assess exposure risks and confirm whether control measures are working effectively.

Airborne asbestos fibres pose a significant health risk when materials are disturbed. Monitoring provides data to identify potential exposure risks early and supports decisions around safety, control measures and compliance.

The PCBU responsible for the work is typically accountable for ensuring appropriate air monitoring is carried out where there is a risk of airborne asbestos exposure. This may be coordinated directly or through an independent consultant such as ALS.

The duration depends on the type of monitoring required and the project scope. Monitoring can range from short-term testing during specific activities to continuous monitoring throughout removal works, with laboratory analysis required before results are issued.