Cutting Bricks Without Dust Controls
On an occupied site, a subcontractor is cutting bricks with a petrol-powered disc cutter in an open area beside a footpath used by the public. The cutter is running dry, and a visible dust cloud drifts toward the footpath. The operator wears safety glasses but no respirator. The site has a written safe work method statement that specifies wet cutting or extraction and respiratory protection. The subcontractor says the job is small and will be finished in an hour.
1. What are the main risks, and how should the supervisor respond?
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Dry cutting brick with a petrol disc cutter generates respirable crystalline silica dust, which is a serious health hazard, and the dust cloud drifting toward a public footpath creates a risk to the public as well as the operator. The operator has no respiratory protection, and the method contradicts the site's safe work method statement, which requires wet cutting or extraction and respiratory protection. The supervisor should stop the task immediately, not accept the 'small job' argument. The controls required are wet cutting or on-tool extraction, a suitable respirator fitted to the operator, exclusion of the public from the drift zone, and use of a cutter suited to the task. The subcontractor must comply with the safe work method statement before work resumes.
2. How would you manage the public interface and document the decision?
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The public footpath must be protected: either relocate cutting to a controlled area away from the public, or set up exclusion and signage and schedule the work when the footpath is clear, with a spotter if needed. The dust drift direction and wind should be checked, and cutting should not proceed when drift reaches the footpath. The supervisor should record the stop-work instruction, the nonconformity against the safe work method statement, the corrective actions taken, and the re-inspection before restart. The subcontractor should be reminded that a short duration does not justify omitting controls. If the task cannot be done safely in that location, it should be moved or deferred.