Table 4.1
Equations for quantifying exposure to groundwater pollutants through different pathways (sensitive land)
No
Exposure pathway
Category
Calculation equation
1
Groundwater intake
Carcinogenic
exposure
CGWER
ca
¼
GWCRcÂEFcÂEDc
BWcÂATca
þ
GWCRaÂEFaÂEDa
BWaÂATca
Non-carcinogenic
exposure
CGWER
nc
¼
GWCRcÂEFcÂEDc
BWcÂATnc
2
Inhalation of gaseous groundwater pollutants in
outdoor air
Carcinogenic
exposure
IOVER
ca3
¼ VF
gwoa
Â
DAIR
c
 EFO
c
 ED
c
BW
c
 AT
ca
þ
DAIR
a
 EFO
a
 ED
a
BW
a
 AT
ca
Non-carcinogenic
exposure
IOVER
nc3
¼ VF
gwoa
Â
DAIRcÂEFOcÂEDc
BWcÂATnc
3
Inhalation of gaseous groundwater pollutants in
indoor air
Carcinogenic
exposure
IIVER
ca2
¼ VF
gwia
Â
DAIR
c
 EFI
c
 ED
c
BW
c
 AT
ca
þ
DAIR
a
 EFI
a
 ED
a
BW
a
 AT
ca
Non-carcinogenic
exposure
IIVER
nc2
¼ VF
gwia
Â
DAIRcÂEFIcÂEDc
BWcÂATnc
4.1 Health Risk Assessment of Typical Groundwater Contamination Sites
73