https://doi.org/10.1351/goldbook.15706
Refers to a pesticide residue or contaminant arising from environmental sources (including former agricultural uses) other than the use of a pesticide or contaminant substance directly or indirectly on the commodity. It is the maximum concentration of a pesticide residue or contaminant that is recommended by the Codex Alimentarius Commission to be legally permitted or recognized as acceptable in or on food, agricultural commodity, or animal feed.
Note: The mass content is expressed in milligrams of pesticide residue or contaminant per kilogram of commodity.