TLV
Treshhold limit value and other acronyms
| Acronym | Expression | Definition |
| AGW | Arbeitsplatzgrenzwert | |
| IDLH | Immediately Dangerous to Life or Health | A concentration likely to cause death or immediate or delayed permanent adverse health effects. |
| MAK | Maximum Arbeitsplatz Konzentration | Maximum Concentration Concentration Value used in Germany is a TLV analogue |
| PEL | Permissible Exposure Limit | The Permissible Exposure Limit (PEL or OSHA PEL) is a TLV( established by OSHA in the US for exposure of an employee to a substance or physical agent and may differ from TLVs(R) in other jurisdictions. Permissible Exposure Limits are established by the Occupational Safety and Health Administration (OSHA). A PEL is usually given as a time-weighted average (TWA), although some are Short Term Exposure Limits (STEL) or Ceiling Limits. |
| REL | Recommended Exposure Limits | Are TLVs established by NIOSH for exposure of an employee to a substance or physical agent. |
| STEL | Short Term Exposure Limit | The maximum concentration, to which workers can be exposed for a period of not longer than 15 minutes continuously without suffering from: ( I ) irritation, ( 2 ) chronic or irreversible tissue damage, or ( 3 ) narcosis of sufficient degree to increase the likelihood of accidental injury, impair self-rescue, or materially reduce work efficiency, and provided that the daily TLV-TWA is not exceeded. |
| TLV | Threshold Limit Value | Establishes the reasonable level to which a worker may be repeatedly exposed, day after day, over a working lifetime without adverse health effects |
| TLV-C | Threshold Limit Value-Ceiling | The concentration that should not be exceeded during any part of the working exposure. In conventional industrial hygiene practice if instantaneous monitoring is not feasible, the TLV-C can be assessed by sampling over a 15 minute period except for those substances that may cause immediate irritation when exposures are short. |
| TRK | Technische Richtkonzentration | Outdated. Since 1.1.2005 replaced by AGW |
| TWA | Time Weighted Average | Threshold Limit Value-Time-Weighted Average The time-weighted average concentration for a normal 8-hour workday or 40-hour workweek, to which nearly all workers may be repeatedly exposed, day after day, without adverse effect. |
| WEEL | Workplace Environmental Exposure Levels |