This standard stipulates the maximum allowable concentration index value of pollutants in soil and the corresponding monitoring methods based on soil application functions, protection objectives and main properties of soil. This standard applies to soil in farmland, vegetable fields, tea gardens, orchards, pasture woodlands, nature reserves and other places. GB 15618-1995 Soil Environmental Quality Standard GB15618-1995 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Environmental quality standard for soilsGB15618-1995
In order to implement the "Environmental Protection Law of the People's Republic of China", prevent soil pollution and protect the ecological environment, This standard is formulated to ensure agricultural and forestry production and safeguard human health.
1 Subject content and scope of application
1.1 Subject content
This standard specifies the maximum allowable concentration index value of pollutants in soil according to soil application functions, protection objectives and main properties of soil. and corresponding monitoring methods.
1.2 Scope of application
This standard applies to soil in farmland, vegetable fields, tea gardens, orchards, pastures, woodlands, nature reserves and other places. 2 Terms
2.1 Soil: refers to the loose layer on the earth's land surface where green plants can grow. 2.2 Soil cation exchange capacity: refers to the number of cations in the solution that are adsorbed by negatively charged soil colloids through electrostatic attraction, expressed as centimoles of all replaceable cations per kilogram of dry soil (calculated as monovalent ions) Number representation. 3 Soil environmental quality classification and standard grading
3.1 Soil environmental quality classification
According to soil application functions and protection objectives, it is divided into three categories: Category I is mainly applicable to nature reserves stipulated by the state (original (Except those with high background heavy metal content), soils in centralized drinking water sources, tea gardens, pastures and other protected areas, the soil quality basically maintains the natural background level. Class II is mainly suitable for general farmland, vegetable fields, tea gardens, orchards, pastures and other soils. The soil quality basically does not cause harm or pollution to plants and the environment.
The Japanese type is mainly suitable for forest soil, high background value soil with large pollutant capacity and farmland soil near minerals (except vegetable fields). Soil quality basically does not cause harm or pollution to plants and the environment. 3.2 Standard classification
The first-level standard is the limit value for protecting the natural ecology of the region and maintaining the soil environmental quality of the natural background. The secondary standard is the soil limit value to ensure agricultural production and maintain human health. The third-level standard is the soil critical value that ensures agricultural and forestry production and normal plant growth. 3.3 The levels of implementation standards for various types of soil environmental quality are as follows: Class I soil environmental quality implements the first-level standard, Class II soil environmental quality implements the second-level standard; Sub-category soil environmental quality implements the third-level standard. National Environmental Protection Administration 1995- Approved on 07-13 and implemented on 1996-03-01
235
standard value
4
The three-level standard value specified in this standard is shown in Table 1.
—1995
Table 1 Soil Environmental Quality Standard Values
Level
Soil,
Project
Cadmium
Mercury
Arsenic paddy field
dry land
copper farmland etc.
orchard
lead
paddy field
chromium
Zhuodi
Zinc
Nickel
666
DDT
Level 1
Natural background
0.20|| tt||0.15
15
15
35
35
90
90
100||tt| |40
0.05
0.05
6.5
0.30
0.30
30
40
50
150
250
250
150wwW.bzxz.Net
200
40
Level 2
6.5~ 7.5
0.30
0.50
25
30
100
200
300
300| |tt||200
250
50
0.50
0.50
>7.5
0.60
1.0|| tt||20
25
100
200
350
350
250
300||tt| |60
mg/kg
Level 3
>6.5
1.0
1.5
30
40|| tt||400
400
500
400
300
500
200
1.0||tt| | 1.0 | , its standard value is half of the value in the table. ② 666 is the total amount of the four isomers, and DDT is the total amount of the four isomers. ③For the soil environmental quality standard of paddy and dry land rotation, the paddy field value is used, and for chromium, the dryland value is used. 5 Monitoring
5.1 Sampling method: The soil monitoring method refers to the relevant chapters of the "Environmental Monitoring Analysis Methods" and "Modern Analysis Methods of Soil Elements" (edited by China Environmental Monitoring Station) of the State Environmental Protection Administration. After the relevant national method standards are promulgated, they will be implemented in accordance with the national standards. 5.2 The analysis method is carried out according to Table 2.
Table 2 Soil Environmental Quality Standard Selection Analysis Method No.
2
236
Project
Cadmium
Mercury||tt| |Measurement method
After the soil sample is digested by hydrochloric acid-nitric acid-perchloric acid (or hydrochloric acid-nitric acid-hydrofluoric acid perchloric acid),
(1) extraction-flame atomic absorption method (1) 2) Determination by graphite furnace atomic absorption spectrophotometry. After the soil sample is digested with nitric acid-sulfuric acid-vanadium pentoxide or sulfur, nitric acid-potassium permanganate, cold atomic absorption method is used to determine
Detection range
mg/kg
over 0.025
over 0.005
over 0.004
note
total soil
total soil mercury
Analysis method
Source
@?
②
Serial number
3
5
6
8
9
10
11
project
god
copper
lead
chromium| | tt | After digestion with perchloric acid, determination by silver diethyldithiocarbamate spectrophotometry
(2) After digestion of soil sample with nitric acid-hydrochloric acid-perchloric acid, determination by potassium borohydride-silver nitrate spectrophotometry
After the soil sample is digested by hydrochloric acid-nitric acid-perfluoric acid (or hydrochloric acid-nitric acid-hydrofluoric acid 1 perfluoric acid), flame atomic absorption spectrophotometry is used to determine the soil sample is digested by hydrochloric acid-nitric acid-hydrofluoric acid- After perfluoric acid digestion (1) extraction-flame atomic absorption method (2) graphite furnace atomic absorption spectrophotometry method after soil sample digestion with sulfuric acid-nitric acid-hydrofuric acid, (1) potassium permanganate oxidation, diphenyl Carbohydrazide Photometric Determination (2) Add ammonium chloride solution and flame atomic absorption spectrophotometry. After the soil sample is digested by hydrochloric acid-nitric acid-perchloric acid (or hydrochloric acid-nitric acid-hydrofuric acid perchloric acid), the flame Atomic absorption spectrophotometry: After the soil sample is digested with hydrochloric acid-nitric acid-perchloric acid (or hydrochloric acid-nitric acid-hydrofluoric acid-homorubic acid), flame atomic absorption spectrophotometry is used to determine the acetone-petroleum ether extraction, and concentrated sulfuric acid purification. Use a gas chromatograph with an electron capture detector to measure
pH
cation exchange capacity
glass electrode method (±: water =1.0:2.5) Ammonium acetate method, etc.
Detection range
mg/kg
0.5 or more
0.1 or more
1.0 or more
0.4 and above
0. 06 and above
1.0 and above
2.5 and above
0.5 and above
2.5 and above
0.005 and above||tt| |Notes
Total arsenic in soil
Analysis method
Source
1?.?
②
Total soil lead　①,②
Total soil lead丨②
Total soil chromium①
Total soil zinc (①,②| |tt||Total Nickel in Soil
?
GB/T
14550-93
②
?
Note: Analysis method Except for soil 666 and DDT, which have national standards, other projects will be implemented after the release of national method standards. The following methods are currently used: ① "Environmental Monitoring Analysis Methods", 1983, Environmental Protection Bureau of the Ministry of Urban and Rural Development and Environmental Protection; ② "Soil Elements" "Modern Analysis Methods of Turbulence", 1992, edited by China Environmental Monitoring Station, China Environmental Science Press; ③ "Physical and Chemical Analysis of Soil", 1978, edited by Nanjing Soil Research Institute, Chinese Academy of Sciences, Shanghai Science and Technology Press ||tt. ||6.1 This standard is supervised and implemented by the environmental protection administrative departments of the people's governments at all levels, and the relevant administrative departments of the people's governments at all levels implement it in accordance with relevant laws and regulations
6.2 The environmental protection administrative departments of the people's governments at all levels. According to the soil application function and protection objectives, the soil environmental quality categories in the jurisdiction are divided and reported to the people's government at the same level for approval. Additional notes:
This standard is proposed by the Science and Technology Standards Department of the State Environmental Protection Administration. The Nanjing Institute of Environmental Science of the Environmental Protection Bureau is responsible for drafting, and the main drafters of this standard are Xia Jiaqi, Cai Daoji, Xia Zenglu, Wang Hongkang, Wu Meiling, Liang Wei and other units. . This standard is interpreted by the National Environmental Protection Agency. 237
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