Respirators: Because What You Can''t See Can Hurt You NPCA
Nov 07, 2012· So what does all this mean? It means that if you work with materials that contain silica and you work in an area where silica can become airborne – due to concrete cutting, grinding, coring, stoning, cement mixing and sweeping, or sandblasting – you need to wear a respirator. Some straightforward facts about respirators and silica dust