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TLV, or Threshold Limit Value, is a guideline that provides information about the permissible exposure limits of various chemical substances in the workplace. It specifies the concentration of these chemicals in the air, which employees can be exposed to over a specific time frame without experiencing adverse health effects. This standard is critical for ensuring occupational health and safety, as it helps assess potential risks and implement appropriate control measures.

While TLVs are not legally mandated and are not established by the CDC, they are developed and published by organizations like the American Conference of Governmental Industrial Hygienists (ACGIH). It’s important to distinguish that TLVs can vary depending on the substance and the duration of exposure but are not specifically adjusted based on the workplace. Thus, the most accurate statement about TLVs is that they specify the allowable exposure limits for substances.