Nautical Term: TLV

Definition of TLV

Threshold Limit Value (TLV) refers to the maximum permissible concentration of a substance in the atmosphere, according to occupational exposure limits set by organizations such as the National Institute for Occupational Safety and Health (NIOSH). For instance, a worker in a shipyard may be exposed to welding fumes, which can contain harmful substances such as lead, manganese, and cadmium. According to NIOSH, the recommended TLV for lead is 0.05 mg/m3, for manganese is 0.2 mg/m3, and for cadmium is 0.01 mg/m3. It is essential for shipyard employers to ensure that their workers are not exposed to these harmful substances above the recommended TLVs.

Example paragraph: A shipyard worker is involved in the installation of new piping systems. The shipyard employer has ensured that appropriate engineering controls and administrative measures are in place to protect the workers from exposure to harmful substances during the piping installation process.

However, the piping material being used contains cadmium, which is a harmful substance with a recommended Threshold Limit Value (TL

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