NIOSH reviews crystalline silica hazards
June 21, 2002
NIOSH's study notes that there is a substantial risk of a worker contracting silicosis if exposed to crystalline silica over a lifetime at the current OSHA permissible exposure limit. This substance is also believed to cause lung cancer, emphysema, bronchitis, upper respiratory ailments and autoimmune disease.
NIOSH suggests reducing the exposure limit, provide respirators where needed, find a substitute if possible and conduct more research.