Threshold Limit Value (TLV)
the maximum permissible concentration of a substance typically expressed in ppm that a worker may be exposed to for 8 hours (sometimes 40 hours). TLV is a legally mandated safety limit. | ||||
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Threshold Limit Value definition was found in categories: Society & Culture(2) Science & Technology(1) Medicine(1) Encyclopedia(1)
Threshold Limit Value Definition from Society & Culture Dictionaries & Glossaries
| EPA Terms of Environment |
Threshold Limit Value (TLV)
The concentration of an airborne substance to which an average person can be repeatedly exposed without adverse effects. TLVs may be expressed in three ways: (1) TLV-TWA--Time weighted average, based on an allowable exposure averaged over a normal 8-hour workday or 40-hour work- week; (2) TLV-STEL--Short-term exposure limit or maximum concentration for a brief specified period of time, depending on a specific chemical (TWA must still be met); and (3) TLV-C--Ceiling Exposure Limit or maximum exposure concentration not to be exceeded under any circumstances. (TWA must still be met.)
The concentration of an airborne substance to which an average person can be repeatedly exposed without adverse effects. TLVs may be expressed in three ways: (1) TLV-TWA--Time weighted average, based on an allowable exposure averaged over a normal 8-hour workday or 40-hour work- week; (2) TLV-STEL--Short-term exposure limit or maximum concentration for a brief specified period of time, depending on a specific chemical (TWA must still be met); and (3) TLV-C--Ceiling Exposure Limit or maximum exposure concentration not to be exceeded under any circumstances. (TWA must still be met.)
| Environmental Engineering (English ver.) |
Threshold Limit Value (TLV)
The concentration of an airborne substance to which an average person can be repeatedly exposed without adverse effects. TLVs may be expressed in three ways: (1) TLV-TWA--Time weighted average, based on an allowable exposure averaged over a normal 8-hour workday or 40-hour work- week; (2) TLV-STEL--Short-term exposure limit or maximum concentration for a brief specified period of time, depending on a specific chemical (TWA must still be met); and (3) TLV-C--Ceiling Exposure Limit or maximum exposure concentration not to be exceeded under any circumstances. (TWA must still be met.)
The concentration of an airborne substance to which an average person can be repeatedly exposed without adverse effects. TLVs may be expressed in three ways: (1) TLV-TWA--Time weighted average, based on an allowable exposure averaged over a normal 8-hour workday or 40-hour work- week; (2) TLV-STEL--Short-term exposure limit or maximum concentration for a brief specified period of time, depending on a specific chemical (TWA must still be met); and (3) TLV-C--Ceiling Exposure Limit or maximum exposure concentration not to be exceeded under any circumstances. (TWA must still be met.)
Threshold Limit Value Definition from Science & Technology Dictionaries & Glossaries
| Electronics Terminology |
Threshold Limit Value
A guideline for the exposure of humans to solvents; it is expressed as a Time Weighted Average (TWA) of the parts per million of vapor in air.
A guideline for the exposure of humans to solvents; it is expressed as a Time Weighted Average (TWA) of the parts per million of vapor in air.
Threshold Limit Value Definition from Medicine Dictionaries & Glossaries
| TOXICOLOGY |
Threshold Limit Value (TLV)
A recommendation by the ACGIH for the highest level of exposure to a chemical that is safe.
A recommendation by the ACGIH for the highest level of exposure to a chemical that is safe.
Threshold Limit Value Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Threshold Limit Value
The Threshold Limit Value (TLV) of a chemical substance defines the reasonable level to which a worker can be exposed without adverse health effects. Strictly speaking, TLV is a reserved term of the American Conference of Governmental Industrial Hygienists (ACGIH). It is however sometimes loosely used to refer to other similar concepts used in occupational health and toxicology. TLVs (along with biological exposure indices or BEIs) are published annually by the ACGIH.
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