The threshold limit value (TLV) is established to:

The threshold limit value (TLV) is a critical standard used in occupational health to protect workers from chemical hazards. It represents the maximum concentration of a substance in the workplace air that a worker can be exposed to without experiencing adverse health effects. TLVs are set based on comprehensive scientific research, considering factors such as the substance's toxicity, exposure duration, and potential health effects.

By establishing these limits, TLVs aim to minimize the risks of occupational exposure to harmful chemicals, thereby promoting a safer work environment. This is particularly important for industries where workers may frequently come into contact with hazardous materials, ensuring that safety protocols are in place to prevent long-term health issues.

In contrast, the other options focus on different aspects of hazardous materials management. Defining hazardous waste disposal procedures pertains to how waste is safely and legally disposed of, which involves regulations and guidelines beyond just concentration levels. Determining ignition points is essential for fire safety and hazard identification but does not directly relate to worker exposure limits. Assessing environmental impacts of hazardous materials involves broader ecological considerations rather than the specific focus on worker safety that TLVs address.