(e) Health risk control value
Characterized based risk that this IN A landfill ground phosphorous, fluorine
contamination by drinking groundwater this kind way the original receptor field of a
non-oncogenic harm index exceeds the acceptable hazard level (1). According to
“contaminated sites Risk Assessment Guidelines” (HJ25.3–2014) corresponding
formula, by HERA software interest is calculated based contaminants
non-carcinogenic hazards groundwater risk control value (target repair) (see
Table 5.36).
As identified in risk characterization, for in situ receptors, the hazard quotient of
phosphorous and fluorine in the groundwater through intake pathway is beyond the
acceptable level, so the control values (target levels) are calculated using the HERA
model in accordance with the Technical Guidelines for Risk Assessment of
Contaminated Sites (HJ25.3–2014) (Table 5.36).
As shown in Table 5.36, the target levels for phosphorus and fluorine are calculated, based on non-cancer hazard, to be 0.0000948 mg/L and 0.19 mg/L
respectively. Since the non-standard landfill is still in operation, local environmental authorities should order to stop piling up waste and develop appropriate
remediation measures. Only by doing so, the calculation of target levels can be of
practical significance.
In-situ
Off-site
Indoor inhalation of vapor
Outdoor inhalation of vapor
Groundwater intake
Groundwater intake
Indoor inhalation of vapor
Outdoor inhalation of vapor
Fig. 5.13 Conceptual model for exposure pathways
Table 5.35 Results for hazard quotient of focus pollutants through intake pathway
Pollutants
Monitoring well
ZK1
ZK2
ZK3
ZK4
ZK5
ZK6
ZK7
Phosphorus
–
3.98E+03
1.27E+02
2.54E+02
–
2.12E+02
2.22E+03
Fluorine
1.48E+00
1.95E+00
6.86E−01
6.34E−01
3.17E−01
6.86E−01
9.50E+00
5.1 Central China
147
Characterized based risk that this IN A landfill ground phosphorous, fluorine
contamination by drinking groundwater this kind way the original receptor field of a
non-oncogenic harm index exceeds the acceptable hazard level (1). According to
“contaminated sites Risk Assessment Guidelines” (HJ25.3–2014) corresponding
formula, by HERA software interest is calculated based contaminants
non-carcinogenic hazards groundwater risk control value (target repair) (see
Table 5.36).
As identified in risk characterization, for in situ receptors, the hazard quotient of
phosphorous and fluorine in the groundwater through intake pathway is beyond the
acceptable level, so the control values (target levels) are calculated using the HERA
model in accordance with the Technical Guidelines for Risk Assessment of
Contaminated Sites (HJ25.3–2014) (Table 5.36).
As shown in Table 5.36, the target levels for phosphorus and fluorine are calculated, based on non-cancer hazard, to be 0.0000948 mg/L and 0.19 mg/L
respectively. Since the non-standard landfill is still in operation, local environmental authorities should order to stop piling up waste and develop appropriate
remediation measures. Only by doing so, the calculation of target levels can be of
practical significance.
In-situ
Off-site
Indoor inhalation of vapor
Outdoor inhalation of vapor
Groundwater intake
Groundwater intake
Indoor inhalation of vapor
Outdoor inhalation of vapor
Fig. 5.13 Conceptual model for exposure pathways
Table 5.35 Results for hazard quotient of focus pollutants through intake pathway
Pollutants
Monitoring well
ZK1
ZK2
ZK3
ZK4
ZK5
ZK6
ZK7
Phosphorus
–
3.98E+03
1.27E+02
2.54E+02
–
2.12E+02
2.22E+03
Fluorine
1.48E+00
1.95E+00
6.86E−01
6.34E−01
3.17E−01
6.86E−01
9.50E+00
5.1 Central China
147