Threshold Limit Values

Synonyms

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

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).