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Threshold limit value − time-weighted average (TLV-TWA): The average exposure on the basis of a 8 hours per day, 40 hours per week work schedule. Threshold limit value − short-term exposure limit (TLV-STEL): A 15-minute TWA exposure that should not be exceeded at any time during a workday, even if the 8-hour TWA is within the TLV-TWA.
Many factors contribute in establishing Permissible Exposure Limits. Threshold Limit Values (TLVs), often determined by the American Conference of Governmental Industrial Hygienists (ACGHI), is a key component in determining the PEL. [11] [10] Other things that contribute to determining the PEL are toxicity and particle size. [10]
In mathematical or statistical modeling a threshold model is any model where a threshold value, or set of threshold ... and the threshold z is the biological limit ...
Two years later, the organization adopted its first list of 148 exposure limits, then referred to as Maximum Allowable Concentrations. The term "Threshold Limit Values (TLV) was introduced in 1956. The first list of Threshold Limit Values and Biological Exposure Indices (the TLVs and BEIs book) was published in 1962.
Indicative limit value, set by the European Union; Threshold limit value, set by the American Conference of Governmental Industrial Hygienists; Occupational exposure banding, a process that can be used when not enough data are available to determine quantitative exposure limits
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Threshold (reference value) Absolute threshold; ... Threshold limit value; Threshold model; Threshold of pain; Threshold potential; Other science-related
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