What Does Threshold Limit Value - Ceiling (TLV-C) Mean?
The threshold limit value ceiling is a guideline to assist with the control of health hazards. It is the maximum level of exposure to a chemical substance day after day without suffering any adverse effects. This level must not be exceeded at any time. The threshold limit values are issued by the American Conference of Government Industrial Hygienists (ACGIH).
Safeopedia Explains Threshold Limit Value - Ceiling (TLV-C)
The threshold limit value ceiling is calculated as an average based on the known toxicity levels in humans. It is a fluid statistic, as new research could alter the understanding of toxicity levels. The threshold limit value is only a guideline. It is not to be confused with other limits having regulatory status, such as the given by the Occupational Safety and health Administration (OSHA).