Those values have been established on the basis of the recommendations by the World Health Organisation (WHO) based on scientific evidence at the time, and with the aim to minimise the risk of a harmful exposure.
Določene so bile na podlagi priporočil Svetovne zdravstvene organizacije in temeljijo na znanstvenih dokazih v tistem času, njihov namen pa je zmanjšati tveganje škodljive izpostavljenosti.