Occurrence patterns

Occurrence patterns (OPs) are the combinations (or mixtures) of substances that occur together on foods and the frequencies of these mixtures occurring per food, expressed in percentages. In the context of pesticides, occurrence patterns can be associated with agricultural use percentages. Occurrence patterns are relevant to account for co-occurrence of active substances in exposed individuals. Occurrence patterns may be specified as data or modelled based on observed patterns of positive concentrations.

This module has as primary entities: Foods Substances

Output of this module is used by: Concentration models

Occurrence patterns as data

Occurrence patterns can be provided as data by specification of the occurrence mixtures and their associated occurrence/agricultural use percentages.

• Occurrence patterns data formats

Inputs used: Concentrations Substance authorisations Active substances

Calculation of occurrence patterns

Occurrence patterns can be computed from the observed patterns of positive concentrations in the concentration data.

• Occurrence patterns calculation

Settings and Tiers

• Occurrence patterns settings
  • Selection settings
  • Uncertainty settings
• Occurrence patterns tiers
  • EC 2018 Tier 1
  • EC 2018 Tier 2