Concentrations settings

Selection settings

Table 59 Selection settings for module Concentrations.

Name	Type	Description
Concentrations tier	ConcentrationsTier	Specifies the concentration data should be treated according to a pre-defined tier or custom.
Filter samples exceeding the concentration limits	Boolean	If checked, samples with at least one substance concentration higher than some factor (concentration limit filter exceedance factor) times the MRL are filtered out.
Concentration limit filter exceedance factor	Numeric	The multiplication factor for the concentration limit exceedance filter.
Use substance conversion rules	Boolean	If checked, concentrations are modelled in terms of active substances (using substance conversion).
Substance conversion method	SubstanceTranslationAllocationMethod	Allocation method for assigning active substance concentrations from measured substance concentrations based on substance translations.
Retain all allocated substances after active substance allocation	Boolean	If checked, all allocated substances kept after substance conversion. Otherwise, the concentration data is restricted to the active substances of the assessment group.
Account for substance authorisations in substance conversions	Boolean	Account for substance authorisations when allocating measured substances to active substance using substance conversions.
Fix duplicate substance allocation inconsistencies	Boolean	Resolve inconsistencies when active substance allocation leads to multiple concentration value estimates for the same active substance. This method uses the mean of the positives or zero concentrations when available, or else the lowest of the non-detect values.
Use extrapolation rules	Boolean	Use extrapolation rules to extrapolate food samples for foods with a limited amount of samples (data poor foods) from other foods (data rich foods).
Threshold for extrapolation	Numeric	Threshold for extrapolation.
Restrict extrapolations to equal MRLs	Boolean	Restrict extrapolations to equal MRLs.
Restrict extrapolations to authorised uses	Boolean	Only extrapolate if substance use is authorised.
Impute water concentrations	Boolean	Impute constant concentration values on the selected (water) commodity.
Water commodity	AlphaNumeric	The commodity for which constant concentration values should be added.
Water concentration value (µg/kg)	Numeric	Constant concentration value that should be used for water (in µg/kg).
Restrict water imputation to the five most toxic substances	Boolean	Restrict water imputation to the five most toxic substances.
Restrict water imputation to authorised uses	Boolean	Restrict water imputation to authorised uses.
Include focal commodity concentrations	Boolean	Specifies whether there is monitoring data that should replace part of the consumption data for the specified focal commodities.
Focal commodity foods	AlphaNumeric	The foods for which background concentration data are to be replaced by focal commodity concentrations.
Focal commodity substances	AlphaNumeric	The substances for which background concentration data are to be replaced by focal commodity concentrations.
Focal commodity concentrations replacement method	FocalCommodityReplacementMethod	Replacement method to be used for replacing base concentration data with concentration data of the focal commodity/commodities concentrations.
Focal commodity substance occurrence percentage	Numeric	Anticipated occurrence percentage / agricultural use percentage of the focal commodity.
Adjustment factor for the focal food/substance concentration	Numeric	Optional adjustment factor for the focal food/substance concentration. E.g., the expected ratio of mean monitoring concentration and mean field trial concentration.
Use deterministic substance conversions for focal commodity	Boolean	Convert measured substance concentrations of focal commodity to active substance concentrations using deterministic substance conversion factors.
Filter samples by specific property values (subset selection)	Boolean	Specifies whether a subset selection on specific sample properties should be made (e.g., by country or by year).
Sample locations	AlphaNumeric	The locations for which samples are filtered.
Sample years	AlphaNumeric	The years for which samples are filtered.
Restrict to specific modelled foods (modelled foods subset)	Boolean	If checked, then the assessment is restricted to the specified modelled foods.

Uncertainty settings

Table 60 Uncertainty settings for module Concentrations.

Name	Type	Description
Resample concentrations	Boolean	Specifies whether concentrations are resampled by empirical bootstrap or using a parametric uncertainty model.