Field glossary
Respirable crystalline silica
The fraction of silica dust fine enough to reach deep into the lungs, released by cutting, grinding, drilling, or breaking concrete, masonry, stone, or brick
Also defined as
- Roofing: The fine dust released when cutting fiber cement, regulated under OSHA 1926.1153 and controlled with low-dust methods
- The breathable fraction of quartz dust, fine enough to reach the deep lung, freed when concrete or masonry is cut, ground, drilled, or broken