National Institute for Occupational Safety and Health (NIOSH) researchers conducted a field survey at a small manufacturer of stone monuments (mainly cemetery markers) to characterize workers' exposures to respirable crystalline silica and to evaluate exposure control methods. These exposures result from the use of abrasive blasting for engraving and texturing, since the abrasive agent and/or the

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Crystalline silica is a common mineral found in the earth's crust. Materials like sand, stone, concrete, and mortar contain crystalline silica. It is also used to make products such as glass, pottery, ceramics, bricks, and artificial stone. Respirable crystalline silica – very small particles at ...

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Pumice is a type of extrusive volcanic rock, produced when lava with a very high content of water and gases is discharged from a volcano. As the gas

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SILICA: Silica is an abundant mineral on the earth crust, and it is in sand, quartz and any other minerals. Some minerals have pure silica but in some, silica are mixed with other elements. In silica, the sulfur and oxyden atoms joined by covolent...

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