TLV-TWAThreshold Limit Value-Time-Weighted Average
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Das atividades avaliadas, os niveis de exposicao dos trabalhadores ao Fe estiveram, em sua maioria, acima do TLV-TWA, que e de 2.000 [micro]g/[m.sup.3].
Por outro lado, os niveis de Cr, Cd e Cu se encontravam abaixo dos seus respectivos TLV-TWA, indicando que nao houve risco de exposicao excessiva a esses metais nessas atividades e condicoes de trabalho.
Several of the variables that can be changed are: the total refrigerant mass, the hole diameter for the accident scenario, the temperature and pressure of the refrigerant in the vessel, the volume of the room, and the RCL and TLV-TWA values (which are dependent on the refrigerant).
Hence, the threshold limit value over a time-weighted average (TLV-TWA) for formaldehyde is the time-weighted average concentration for an 8-hour day and a 40-hour workweek to which workers may be repeatedly exposed without adverse effect.