Table 3.7
Scores of OCS hazard indicators
Comprehensive
evaluation of
pollution
factors
Discharge
source intensity
Location of
discharge
Mode of discharge
Affected area
Seepage control
measures
Duration of
existence
Z1
Z2
Z3
Z4
Z5
Z6
Z7
/
Â10
4
m
3
/a
/
/
/
/
a
/
<0.8
2
50
1 Land surface
6 Intermittent infiltration
6
0.1%
2.5 Sealed
1
1
1
0.80–2.50
4 50–l00
3 Vadose zone
8
Partially sealed
5 1–5
3
2.50–4.25
6 100–500
5
Continuous infiltration
8 0.1–1%
5
5–10
5
4.25–7.2
8 500–1000
7 Aquifer
10 Overflow and runoff
10 1–10%
7.5 Exposed
10 10–20
7
>7.20
10 >1000
10
10–100% 10
>20
10
48
3 Rating and Evaluation of Pollution Source Intensity …