What signifies the presence of a dust ignition hazard in a facility?

The presence of a dust ignition hazard in a facility is signified by visible dust that is combustible in nature. When dust particles accumulate and are composed of materials that can ignite, they pose a significant risk for explosions or fires when disturbed, especially in the presence of an ignition source. This type of hazard becomes critical in industries that handle fine particles, such as food processing, woodworking, and chemical manufacturing.

In contrast, non-combustible materials do not present a risk for combustion, while a clean and well-organized workspace helps to minimize hazards and promote safety instead of indicating them. Proper ventilation systems, although vital for controlling dust and reducing the risk of ignition, do not themselves signify the presence of a dust ignition hazard. Effective control measures, including proper housekeeping practices and ventilation, are essential to mitigate the risks but do not indicate the existence of hazards by themselves.