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The leaflet explains what crystalline silica is, in what workplaces it is found, how workers can be exposed, what health effects might occur and how to prevent risks at workplaces.
Cutting stone, as pictured, generates dangerous crystalline silica dust that can become trapped in lung tissue and cause silicosis. This Hazard Alert focuses on countertop industry worker exposures to airborne silica dust, including from quartz in stone.
Some of this dust may be fine enough to breathe deeply into the lungs and cause harm to health. The fine dust is called respirable crystalline silica (RCS) and is too fine to see with normal...
Crystalline silica is the scientific name for a group of minerals composed of silicon and oxygen. The term crystalline refers to the fact that the oxygen and silicon atoms are arranged in a three- dimensional repeating pattern.
In everyday contexts, crystalline silica is safe. However, in industrial workplaces, where materials containing crystalline silica are crushed, ground, drilled, or used in similar processes, a very fine dust is produced. This is known as Respirable Crystalline Silica or RCS. When high levels of
workers only and signs should be posted warning of exposure to crystalline silica. By a joint effort of the employer and workers, the workplace can become a safer environment for everyone.
Under the HCS, appropriate hazard warning labels are required for materials containing more than 0.1 percent crystalline silica by weight or volume which have anticipated downstream uses where crystalline silica may become airborne and present an inhalation hazard to employees working with that mater ial. This
