HSE CoSHH Essentials – QY11 Quarrying Silica – Control Cabins & Vehicle Cabs

This HSE CoSHH Essentials in Quarrying sheet describes good practice using control cabins or vehicle cabs with forced filtration.  It does not apply to underground working.

The design should cover the following points:

• Pre-filters to protect the main filter if coarse silica dusts are present;
• HEPA Filters (BSEN 1822); Type H11 for external RCS concentrations below 1mg/m3; Type H12 or H13 for external RCS concentrations above 1mg/m3;
• Pressure gauges to show the system is working properly;
• Alarms to sound when filters clog;
• Overpressure of around 10Pa inside the cabin to prevent dusty air ingress;
• Flaps to release excess pressure;
• Door Seals …. heavy duty Neoprene or other suitable material; and
• Self-Closing doors

The full guidance sheet can be downloaded here:- HSE QY11 Quarry Silica; Control Cabins etc