What is the TLV of Hydrogen Sulfide?

The Threshold Limit Value (TLV) of Hydrogen Sulfide (H2S) refers to the maximum permissible concentration of this gas in the workplace air over an 8-hour workday and a 40-hour workweek. The correct choice identifies the TLV as 10 parts per million (ppm).

This value is critical for ensuring worker safety, as Hydrogen Sulfide is a highly toxic gas that can pose serious health risks, including respiratory distress and even death at higher concentrations. The designation of 10 ppm provides a guideline that helps employers maintain safe working conditions and mitigate the potential for H2S exposure in environments such as mining and industrial operations.

The other choices represent concentrations that exceed the recommended TLV, which could indicate an unsafe exposure level for workers. By adhering to the TLV of 10 ppm, companies can better protect their employees from the hazardous effects of Hydrogen Sulfide.