Work processes can release dusts, gases, fumes, vapours or mists into the air. The PCBU must eliminate or minimise airborne contaminant risk and ensure workers are not exposed above the workplace exposure standard. Australia is moving to a new workplace exposure limits list for airborne contaminants, and until 1 December 2026 the existing workplace exposure standards must still be complied with. Health monitoring must be provided where there is a significant risk to a worker's health from particular chemicals and a valid way to determine health effect or biological exposure exists, and if monitoring shows effects the PCBU should do more to protect health. In the work environment where hazardous chemicals are used and stored the PCBU must manage ignition source risks, keep flammable and combustible substances to a minimum, provide spill containment where there is a risk of spill or leak, provide fire protection and firefighting equipment designed for the chemicals and conditions, compatible with the emergency service's equipment and properly installed, tested and maintained, and provide other emergency equipment. When a storage and handling system is no longer used it should be free of hazardous chemicals or correctly labelled, and signage and regulator notification are needed for large or bulk quantities of certain chemicals.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.