Which threshold value corresponds to silica according to safety regulations?

The threshold value for silica exposure is critical for ensuring the health and safety of workers in mining and related industries. The correct answer indicates a range of 5-50 million particles per cubic foot (mppcf), which aligns with established safety regulations aimed at protecting workers from the harmful effects of respirable crystalline silica inhalation.

These health guidelines are in place considering the potential health risks associated with silica dust exposure, such as silicosis and lung cancer. The range acknowledges the variability in exposure conditions that workers may face and sets a standard to minimize risk.

Other ranges associated with the other choices do not align with the current recognized safety regulations for silica. These figures may exceed acceptable limits or fall below levels that ensure adequate protection, emphasizing the importance of strict adherence to the established thresholds. This reflects an understanding that setting accurate thresholds is essential for maintaining safe working environments and promoting worker health.