indicators detected at monitoring well #3 are identified as the characteristic indicators of the landfill, and then samples of other monitoring wells are tested and
analyzed (Table 5.39).
(3) Groundwater environmental assessment
(a) Determination of background values
The background values of the landfill are determined based on the water quality
data of monitoring well #1, as shown in Table 5.40.
(b) Test results for groundwater quality
The groundwater quality is tested in accordance with the Method for Determination
of Groundwater Quality (DZ/T0064.2–1993). The test results by indicators are as
shown in Table 5.41.
(c) Groundwater quality assessment
The study area is the main source that recharges groundwater in the alluvial-pluvial
fan. In accordance with the Quality Standards for Groundwater (GB/T14848–
2017), the standard index method described in Sect. 2.2.7 is used for
indicator-specific evaluation and comprehensive evaluation of groundwater quality
in the study area.
Table 5.39 Groundwater monitoring indicator system for typical MSWLFs
Type
Name
Quantity
Natural
background
ions
Potassium, calcium, sodium, magnesium, sulfate, chloride,
carbonate, bicarbonate
8
Conventional
indicators
pH, dissolved oxygen, ORP, conductivity, chromaticity, flavor
level, turbidity, macroscopic objects, total hardness, total
dissolved solids, iron, manganese, copper, zinc, volatile
phenols, total phosphorus, total organic carbon, anionic
synthetic detergents, permanganate index, nitrate nitrogen,
nitrite nitrogen, ammonia nitrogen, fluoride, cyanide, mercury,
arsenic, selenium, chromium, hexavalent chromium, lead, total
coliforms
31
Characteristic
indicators
Nickel, bismuth, molybdenum, bromide, iodide, sulfide,
dichloroethylene, benzene, toluene, ethylbenzene,
trichloroethylene, tetrachloroethylene, chloroform,
trichloroethane, xylene, styrene, (total) chlorobiphenyl,
dimethyl phthalate (DMP), hexachlorocyclohexane (HCH),
dichloro-diphenyl-trichloroethane (DDT), methyl parathion,
benzo(a)pyrene (BaP), naphthalene, chlorobenzene,
tribromomethane, dichloropropane, dichloromethane, vinyl
chloride, carbon tetrachloride, fluoranthene, fluorene, benzo(b)
fluoranthene (BbF), dinitrotoluene, chlorophenol, gross alpha
radioactivity, gross beta radioactivity
36
5.2 Northwest China
173
analyzed (Table 5.39).
(3) Groundwater environmental assessment
(a) Determination of background values
The background values of the landfill are determined based on the water quality
data of monitoring well #1, as shown in Table 5.40.
(b) Test results for groundwater quality
The groundwater quality is tested in accordance with the Method for Determination
of Groundwater Quality (DZ/T0064.2–1993). The test results by indicators are as
shown in Table 5.41.
(c) Groundwater quality assessment
The study area is the main source that recharges groundwater in the alluvial-pluvial
fan. In accordance with the Quality Standards for Groundwater (GB/T14848–
2017), the standard index method described in Sect. 2.2.7 is used for
indicator-specific evaluation and comprehensive evaluation of groundwater quality
in the study area.
Table 5.39 Groundwater monitoring indicator system for typical MSWLFs
Type
Name
Quantity
Natural
background
ions
Potassium, calcium, sodium, magnesium, sulfate, chloride,
carbonate, bicarbonate
8
Conventional
indicators
pH, dissolved oxygen, ORP, conductivity, chromaticity, flavor
level, turbidity, macroscopic objects, total hardness, total
dissolved solids, iron, manganese, copper, zinc, volatile
phenols, total phosphorus, total organic carbon, anionic
synthetic detergents, permanganate index, nitrate nitrogen,
nitrite nitrogen, ammonia nitrogen, fluoride, cyanide, mercury,
arsenic, selenium, chromium, hexavalent chromium, lead, total
coliforms
31
Characteristic
indicators
Nickel, bismuth, molybdenum, bromide, iodide, sulfide,
dichloroethylene, benzene, toluene, ethylbenzene,
trichloroethylene, tetrachloroethylene, chloroform,
trichloroethane, xylene, styrene, (total) chlorobiphenyl,
dimethyl phthalate (DMP), hexachlorocyclohexane (HCH),
dichloro-diphenyl-trichloroethane (DDT), methyl parathion,
benzo(a)pyrene (BaP), naphthalene, chlorobenzene,
tribromomethane, dichloropropane, dichloromethane, vinyl
chloride, carbon tetrachloride, fluoranthene, fluorene, benzo(b)
fluoranthene (BbF), dinitrotoluene, chlorophenol, gross alpha
radioactivity, gross beta radioactivity
36
5.2 Northwest China
173