occupational exposure limit

initialism: OEL
https://doi.org/10.1351/goldbook.15933
Regulatory level of exposure to substances, intensities of radiation, etc., or other conditions, specified appropriately in relevant government legislation or related codes of practice.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1273 [Terms] [Paper]