![]() can include progressive massive fibrosis where the fibrotic nodules in the lung aggregate.can develop after long term exposure to lower levels of silica dust and causes fibrotic nodules and shortness of breath.can develop after exposures of 3 to 10 years to moderate to high levels of silica dust and causes inflammation, protein in the lung and scarring of the lung (fibrotic nodules).can develop after a short exposure to very high levels of silica dust, within a few weeks or years, and causes severe inflammation and an outpouring of protein into the lung.If a worker is exposed to silica and breathes it in they can develop: Respirable silica dust particles are small enough to breathe in and penetrate deep into the lungs causing permanent damage that can lead to serious illness or death. ![]() Some dust particles can be so small that they are not visible, these are referred to as respirable particles. hydraulic fracturing of gas and oil wells.angle grinding, jack hammering and chiselling of concrete or masonry.abrasive blasting (blasting agent must not contain greater than 1 percent of crystalline silica).brick, concrete or stone cutting especially using dry methods.mining, quarrying and mineral ore treating processes.clay and stone processing machine operations.excavation, earth moving and drilling plant operations.during fabrication and installation of composite (engineered or manufactured) stone countertops.Silica dust is generated in workplace processes such as: When silica becomes airborne and is inhaled by a worker it is extremely dangerous. The most common type of crystalline silica is quartz. There are non-crystalline and crystalline forms of silicon dioxide. composite stone used to fabricate kitchen and bathroom benchtops.Silica is used to make products including: the workplace exposure standard for respirable crystalline silica. ![]()
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