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Descriptor English: Threshold Limit Values
Descriptor Spanish: Valores Limites del Umbral
Descriptor Portuguese: Níveis Máximos Permitidos
Descriptor French: Valeurs limites d'exposition
Entry term(s): STEL
STELs
Short-Term Exposure Limit
TLV BLV
TLV Ceiling
TLV STEL
TLV TWA
TLV-BLV
TLV-BLVs
TLV-Biological Limit Value
TLV-Ceiling
TLV-Ceilings
TLV-STEL
TLV-STELs
TLV-TWA
TLV-TWAs
TLV-Time Weighted Average
Tree number(s): N03.706.615.917
N06.850.460.350.600.807
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D020711
Scope note: Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).
Public MeSH Note: 2000; see MAXIMUM PERMISSIBLE EXPOSURE LEVEL 1976-1999; for TLV see MAXIMUM PERMISSIBLE EXPOSURE LEVEL 1976-1999
History Note: 2000; use MAXIMUM ALLOWABLE CONCENTRATION 1976-1999; for TLV use MAXIMUM ALLOWABLE CONCENTRATION 1976-1999
Related: Maximum Allowable Concentration MeSH
DeCS ID: 34572
Unique ID: D020711
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 2000/01/01
Date of Entry: 1999/11/09
Revision Date: 2008/07/08
Threshold Limit Values - Preferred
Concept UI M0328359
Scope note Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).
Preferred term Threshold Limit Values
TLV-Time Weighted Average - Narrower
Concept UI M0332627
Preferred term TLV-Time Weighted Average
Entry term(s) TLV TWA
TLV-TWA
TLV-TWAs
TLV-Ceiling - Narrower
Concept UI M0333825
Preferred term TLV-Ceiling
Entry term(s) TLV Ceiling
TLV-Ceilings
Short-Term Exposure Limit - Narrower
Concept UI M0332625
Preferred term Short-Term Exposure Limit
Entry term(s) STEL
STELs
TLV STEL
TLV-STEL
TLV-STELs
TLV-Biological Limit Value - Narrower
Concept UI M0332626
Preferred term TLV-Biological Limit Value
Entry term(s) TLV BLV
TLV-BLV
TLV-BLVs



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