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The cutting, breaking, crushing, drilling, grinding, or abrasive blasting of these materials may produce fine to ultra fine airborne silica dust. Silica occurs in three forms: crystalline, microcrystalline (or cryptocrystalline) and amorphous (non-crystalline). "Free" silica is composed of pure silicon dioxide, not combined with other elements ...
During various mining processes in which rock/minerals are broken up and collected for processing, mineral dusts are created and become airborne. Inhalation of these dusts can lead to various respiratory illnesses, depending on the dust type (e.g. coal, silica, etc.), size of the dust particulates, and exposure duration. [4]
In 2013 the United States the Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) released a hazard alert based on data collected by NIOSH that "workers may be exposed to dust with high levels of respirable crystalline silica (silicon dioxide) during hydraulic fracturing."
The black lung problem has only grown in recent years as miners dig through more layers of rock to get to less accessible coal, generating deadly silica dust in the process. Silica dust is 20 ...
OSHA's protection applies to all federal agencies. Section 19 of the OSH Act makes federal agency heads responsible for providing safe and healthful working conditions for their workers. OSHA conducts inspections of federal facilities in response to workers' reports of hazards and under programs that target high-hazard federal workplaces. [8]
Burned residential areas may contain silica dust, asbestos, metals, or polyaromatic hydrocarbons. Additional health hazards of fire debris cleanup work may include carbon monoxide and hazardous liquids [2] Silica, or silicon dioxide, can occur in a crystalline or noncrystalline (amorphous) form. In fire debris, silica can be found in concrete ...