5.16 Soil Ingestion

5.16 SOIL INGESTION

Soil ingestion is considered for the atmospheric transport pathway and the measured soil concentration pathway. Default parameter values for each of these pathways are given in Table 5.16.

TABLE 5.15 Shoreline Sediment Ingestion Parameter Default Values

			Default Value
Parameter	Definition	Units	Individual	Population
F_sl	contact frequency	event/d	0.066	0.066
TE_l	event time	h/event	0.5	0.5
F_hs	time fraction	--^(a)	1.0	1.0
U_hs	sediment ingestion rate	g/h	0.1	0.1
(a) Dash indicates not applicable.

TABLE 5.16 Soil Ingestion Parameter Default Values

			Default Value
Parameter	Definition	Units	Individual	Population
Both routes:
F_ds	time fraction	--	1.0	> 1.0
U_ds	soil ingestion rate	g/d	0.1	0.1

Atmospheric deposition route:

t_dd	soil layer thickness	m	0.04	0.04
r_dd	soil density	g/cm³	1.5	1.5