Table 5.76
Test results of water quality at monitoring point K2 downstream of the plant site
Test items
Sampling position
Class III standard for
groundwater quality
1 m below the water level
1/2 of the well depth below the
water level
3/4 of the well depth below the
water level
pH
6.85
6.73
6.91
6.75
6.89
6.76
6.5–8.5
Chroma
<5
<5
<5
<5
<5
<5
15
Odor and smell
No odor, no
peculiar
smell
No odor, no
peculiar
smell
No odor, no
peculiar
smell
No odor, no
peculiar
smell
No odor, no
peculiar
smell
No odor, no
peculiar
smell
No
Turbidity
0.6
0.7
0.5
0.6
0.5
0.6
3
Total hardness
234
262
225
256
206
254
450
Total dissolved
solid
496
511
493
503
474
506
1000
Volatile phenol
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.002
Sulfate
12.7
15.2
12.2
14.7
12
14.3
250
Chloride
24.8
31.0
24.6
34.7
23.9
35.5
>350
Nitrate
2.13
2.68
2.06
2.61
2.05
2.78
250
Nitrite
0.003
0.003
0.003
0.003
0.002
0.002
0.02
Ammonia-nitrogen
0.05
0.06
0.04
0.04
0.04
0.04
0.2
Cyanide
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.05
Fluoride
0.7
0.8
0.7
0.9
0.7
0.7
1.0
Iron
0.1
0.13
0.09
0.15
0.09
0.12
0.3
Manganese
0.045
0.046
0.045
0.047
0.044
0.049
0.1
Copper
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
1.0
Zinc
0.05
0.06
0.05
0.08
<0.05
<0.05
1.0
Molybdenum
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.01
(continued)
244
5 Application Cases