Introduction to Monitoring Air Quality on the Job Site

Air quality monitoring on job sites is both a legal obligation and a quality control tool. Under Australian WHS legislation, PCBUs (Persons Conducting a Business or Undertaking) must identify and control airborne hazards that could affect workers or occupants.

Why Monitor Air Quality on Site?

Worker protection — exposure to mould spores, asbestos fibres, silica dust, and chemical vapours can cause serious and permanent health conditions.

Regulatory compliance — Safe Work Australia and state-based regulators require hazard identification and control for airborne risks.

Quality assurance — air monitoring verifies that remediation interventions are effective.

Client confidence — monitoring data demonstrates professional standard of care.

Key Exposure Standards (Safe Work Australia)

Respirable dust: 3 mg/m³ TWA

Respirable crystalline silica (RCS): 0.05 mg/m³ TWA

Total dust (nuisance): 10 mg/m³ TWA

Air monitoring results must be recorded and available for inspection. Exposure monitoring records are required to be retained for 30 years under Australian WHS regulations for certain hazardous substances.