When operating core saws or drills (including rig-mounted and handheld core drilling), it's essential to recognize that these activities can generate respirable crystalline silica dust. The inhalation of these small silica particles over time can cause irreversible damage to the lungs.

To address the potential exposure, WorkCover Queensland recommends the following controls in line with the Managing respirable crystalline silica in construction and manufacturing of construction elements code of practice 2022 (PDF, 1.71 MB) (the Code):

Use suitable engineering controls

Utilize wet cutting with a continuous water feed on the blade integrated into the machine. This approach effectively reduces silica dust when using rig-mounted core saws or drills. Many of these tools come with an integrated water delivery system that directs a continuous stream onto the blade or drill bit, wetting the material being drilled and minimizing dust generation. Ensure water flow rates are sufficient to minimize visible dust release.

Operate and maintain a rig-mounted core saw or drill following the manufacturer’s instructions to minimize dust emissions.

Check hoses for secure connections and any signs of damage. Adjust nozzles to direct water to the blade, wetting the cutting area. Regularly inspect the saw blade or drill bit to ensure it's in good condition and not excessively worn. Operate and maintain the dust-control equipment as per the manufacturer’s instructions. Promptly clean up wet slurry before it dries and releases silica dust into the air. Use shovels or a wet vacuum for this purpose.

Select appropriate respiratory protective equipment (RPE)

RPE is not required when conducting wet cutting.