THRESHOLD LIMIT VALUES
\θɹˈɛʃə͡ʊld lˈɪmɪt vˈaljuːz], \θɹˈɛʃəʊld lˈɪmɪt vˈaljuːz], \θ_ɹ_ˈɛ_ʃ_əʊ_l_d l_ˈɪ_m_ɪ_t v_ˈa_l_j_uː_z]\
Definitions of THRESHOLD LIMIT VALUES
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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).
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