In accordance with the recommendations of SCOEL and of the ACSH, where available, limit values for the inhalation route of exposure are established in relation to a reference period of eight hours time-weighted average (long-term exposure limit values) and, for certain carcinogens or mutagens to a shorter reference period, in general fifteen minutes time-weighted average (short-term exposure limit values), in order to limit, to the extent possible, the effects arising from short-term exposure.
I gcomhréir le moltaí SCOEL agus ACSH, nuair atá fáil orthu, bunaítear teorainnluachanna do bhealach ionanálaithe an nochta maidir le tréimhse thagartha 8 n-uaire mar mheán ualaithe thar thréimhse ama (teorainnluachanna nochta fhadtéarmaigh) agus, i gcás carcanaiginí agus só-ghineacha áirithe maidir le tréimhse tagartha níos giorra, 15 nóiméad mar mheán ualaithe thar thréimhse ama i gcoitinne (teorainnluachanna nochta ghearrthéarmaigh), chun na héifeachtaí a eascraíonn as nochtadh gearrthéarmach a theorannú, a mhéid is féidir.