Table 5.92 Statistical table of basic info of the groundwater samples taken
Sample
No.
Exploration
hole No.
Groundwater
horizon
Sampling position
MW1
MW1
#
The 1st
aquifer
Outside the western boundary of the landfill,
upstream of the site per groundwater flow
MW2
MW2
#
The 1st
aquifer
Outside the western boundary of the landfill,
upstream of the site per groundwater flow
Table 5.93 Statistical table of the test and evaluation results of groundwater samples from the 1st
aquifer
Inspection item
Concentration
range
Standard
value
Reference standard
pH
7.3–7.8
6.5–8.5
Class III criteria in “Quality standard for
ground water” (GB/T14848-93)
Chromaticity
(degrees)
5–60
15
Permanganate index
(mg/L)
2.79–18.90
3.0
Nitrate (as N) (mg/L) 3.83–40.3
20
Nitrite (as N) (mg/L)
0.62–0.85
0.02
Total hardness (as
CaCO 3 ) (mg/L)
367–1280
450
Ammonia-nitrogen
(mg/L)
0.4–13.7
0.2
Total dissolved solids
(mg/L)
832–2450
1000
Fluoride (mg/L)
1.73–2.13
1.0
Sulfate (mg/L)
24.7–371.0
250
Cyanide (mg/L)
0.001–0.002
0.05
Chloride (mg/L)
174–483
250
Volatile phenols (as
phenol) (mg/L)
0.001–0.002
0.002
Mercury (mg/L)
<0.001
0.001
Iron (mg/L)
0.005–0.03
0.3
Arsenic (mg/L)
<0.005
0.05
Manganese (mg/L)
0.005–0.940
0.1
Cadmium (m/L)
<0.0001
0.01
Copper (mg/L)
0.0005–0.003
1.0
Zinc (mg/L)
<0.0001
1.0
Hexavalent chromium
(mg/L)
<0.004
0.05
Lead (mg/L)
<0.0001
0.05
Note 1. If the concentration is shown as “ is lower than the detectable threshold, wherein “a” stands for the detectable threshold
2. If an item is shown in bold font in the table, it means that item has exceeded the standard limit
3. If an indicator is not detectable, the result is assumed to be half of the detectable threshold
5.5 North China
277