Symbol	Parameter	Default Valuea	Unit
Input
Ksusp–water	Suspended matterb–water partition coefficient		m3/m3
RHOsusp	Bulk density of (wet) suspended matterc	1,150	kg/m3
RHOsolid	Bulk density of solids	2,500	kg/m3
PECsw A	Predicted environmental concentration for surface water		mg/L
CONVsusp	Conversion factor for suspended matter concentrations: wet weight to dry weight		kgww/kgdw
Fwatersusp	Volume fraction of water in suspended matter	0.9	m3/m3
1,000	Conversion for litre to m3		L/m3
Fsolidsusp	Volume Fraction of solids in suspended matter	0.1	m3/m3 of water–solid slurry
Kpsusp	Partition coefficient solids and water in suspended matter (v/w)		L/kg
Koc	Organic carbon partition coefficient		L/kg1
Focsusp	Weight fraction organic carbon in suspended solid	0.1	kg/kg
Output
PECsed A	Predicted environmental concentration in sediment (fresh water) dry weight		mg/kgd

^aThe use of the indicated default values in the equations is recommended. Reasons for any deviations from these values should be given by the applicant.

^bThe characteristics of suspended matter are used in EqP calculations for sediment rather than the characteristics of bulk‐sediment to reflect the concentration in the upper layer of the sediment, which is considered the major part of exposure for sediment dwelling organisms rather than via the deeper sediment layers.

^cThe concentration in freshly deposited sediment is taken as the PEC for sediment. Therefore, the properties of suspended matter are used.

^dIf the PNEC_sed has to be expressed on a wet weight basis, the expression CONV_susp is omitted from the first equation.