Table 5.3 Results of conventional groundwater quality indicators
Indicators
Detection
limit
Unit
G1
G2
B1
pH
–
Dimensionless
6.63
–
–
Macroscopic objects
–
–
None
–
–
Flavor level
–
–
None
–
–
Dissolved oxygen
–
mg/L
3.55
–
–
Conductivity
–
S/cm
642
–
–
Ammonia nitrogen
0.025
mg/L
0.043
<0.025
<0.025
Nitrite nitrogen
0.01
mg/L
<0.01
<0.01
0.04
Total cyanide
0.004
mg/L
<0.004
<0.004
<0.004
Fluoride
0.05
mg/L
0.25
0.09
0.12
Nitrate nitrogen
0.1
mg/L
3.4
1.1
8.2
Chloride
10
mg/L
29
24
22
Sulfate
0.1
mg/L
30.2
66
67
Total soluble solids
5
mg/L
455
383
457
Total hardness
5
mg/L
132
255
293
Permanganate index
0.5
mg/L
0.7
0.9
0.8
Volatile phenol
0.002
mg/L
<0.002
<0.002
<0.002
Hexavalent
Chromium
0.004
mg/L
<0.004
<0.004
<0.004
Arsenic
0.005
mg/L
<0.005
<0.005
<0.005
Cadmium
0.0001
mg/L
<0.0001
<0.0001
<0.0001
Lead
0.001
mg/L
<0.001
<0.001
<0.001
Mercury
0.0005
mg/L
<0.0005
<0.0005
<0.0005
Iron
0.01
mg/L
<0.01
<0.1
<0.1
Manganese
0.005
mg/L
<0.005
0.018
<0.005
Note The air pressure in the sampling area is about 1017 hpa and the temperature is 20.8 °C
Table 5.4 Test results of organic components in groundwater
Indicators
Detection limit
Unit
G1
G2
B1
Benzene
0.5
lg/L
<0.5
<0.5
<0.5
Toluene
0.5
lg/L
<0.5
<0.5
<0.5
Ethylbenzene
0.5
lg/L
<0.5
<0.5
<0.5
M-xylene and p-xylene
0.5
lg/L
<0.5
<0.5
<0.5
Styrene
0.5
lg/L
<0.5
<0.5
<0.5
O-xylene
0.5
lg/L
<0.5
<0.5
<0.5
1,2-dichloropropane
0.5
lg/L
<0.5
<0.5
–
Vinyl chloride
0.5
lg/L
<0.5
<0.5
–
1,1-dichloroethylene
0.5
lg/L
<0.5
<0.5
–
Dichloromethane
5
lg/L
<5
<5
–
(continued)
102
5 Application Cases