From 1 September 2024, stronger national rules on processing crystalline silica substances took effect, and they directly affect Queensland builders, stonemasons, concreters and other trades. Here's a plain-English summary of what changed and what you need to do.
The model work health and safety laws were amended to tighten controls on processing any crystalline silica substance (CSS) — broadly, material containing at least 1% crystalline silica, such as concrete, bricks, pavers, tiles and engineered and natural stone. Cutting, grinding, drilling or demolishing these materials can release respirable crystalline silica (RCS), a known cause of silicosis.
The workplace exposure standard for RCS is 0.05 mg/m³ averaged over an 8-hour day. Where you can't be certain workers stay below this level, air monitoring is required to check.
Air monitoring should be carried out by a competent person — in practice, a qualified occupational hygienist — using equipment to Australian Standard AS 2985, with samples analysed by an independent NATA-accredited laboratory. If results exceed the standard, they must be reported to WorkSafe Queensland and controls reviewed.
Note: regulatory detail changes — confirm your specific duties with WorkSafe Queensland.
Our occupational hygienists provide respirable crystalline silica monitoring and workplace exposure monitoring to AS 2985, with accredited laboratory analysis and clear reporting. Get in touch or call 0421 748 867.
What is the silica exposure limit in Australia?
0.05 mg/m³ of respirable crystalline silica averaged over an 8-hour working day.
Who can do silica air monitoring?
A competent person, typically a qualified occupational hygienist, using AS 2985 methods and a NATA-accredited laboratory.
