Chemical in soil

(maximum concentration)
is a comprehensive indicator of the content of chemical substances in the soil that is harmless to humans, since the criteria used in its substantiation reflect the possible ways of exposure of the pollutant to contact media, the biological activity of the soil and the processes of its self-purification. The justification for the maximum permissible concentration of chemical substances in the soil is based on 4 main indicators of harmfulness, established experimentally: translocation, characterizing the transition of a substance from soil to plant; migratory water characterizes the ability of a substance to transfer from soil to groundwater and water sources; migratory air indicator of harmfulness characterizes the transition of a substance from soil to atmospheric air, and the general sanitary indicator of harmfulness characterizes the influence of a pollutant on the self-purifying ability of the soil and its biological activity.

In this case, each of the exposure routes is assessed quantitatively with justification for the permissible level of substance content for each hazard indicator. The lowest justified content level is limiting and is taken as the maximum permissible concentration (MU 2.1.7.730-99.) EdwART., 2010

Terms and definitions on environmental protection, environmental management and environmental safety. Dictionary

is a comprehensive indicator of the content of chemical substances in the soil that is harmless to humans, since the criteria used in its substantiation reflect the possible ways of exposure of the pollutant to contact media, the biological activity of the soil and the processes of its self-purification. The justification for the maximum permissible concentration of chemical substances in the soil is based on 4 main indicators of harmfulness, established experimentally: translocation, characterizing the transition of a substance from soil to plant; migratory water characterizes the ability of a substance to transfer from soil to groundwater and water sources; migratory air indicator of harmfulness characterizes the transition of a substance from soil to atmospheric air, and the general sanitary indicator of harmfulness characterizes the influence of a pollutant on the self-purifying ability of the soil and its biological activity. In this case, each of the exposure routes is assessed quantitatively with justification for the permissible level of substance content for each hazard indicator. The lowest justified content level is limiting and is taken as the MPC (MU 2.1.7.730-99).

In this case, each of the exposure routes is assessed quantitatively with justification for the permissible level of substance content for each hazard indicator. The lowest justified content level is limiting and is taken as the maximum permissible concentration (MU 2.1.7.730-99.) Dictionary of environmental terms and definitions, 2010

See what “Maximum permissible concentration of a chemical in soil” is in other dictionaries:

MPC is an environmental standard, the maximum concentration of a polluting chemical in landscape components, which, with everyday influence over a long period of time, does not cause negative effects on the human body or other... ... Ecological dictionary

Maximum permissible concentration- (MPC) of a chemical substance in the soil is a comprehensive indicator of the content of chemical substances in the soil that is harmless to humans, because The criteria used to substantiate it reflect the possible ways the pollutant can influence... ...

Pollutant (MPC) environmental standard, the maximum concentration of a polluting chemical in landscape components, which, with everyday influence for a long time, does not cause negative impacts on... ... Ecological dictionary

It is a comprehensive indicator of the content of chemical substances in the soil that is harmless to humans, since the criteria used in its substantiation reflect the possible ways of exposure of the pollutant to contact media, biological... ... Ecological dictionary

A comprehensive indicator of the content of chemical substances in soil that is harmless to humans, since the criteria used in its substantiation reflect the possible ways of exposure of the pollutant to contact media, biological activity of the soil and... ... Dictionary of business terms

Maximum permissible concentration- (MPC) standard is the amount of a harmful substance in the components of the environment (water, air, soil), with constant contact or with exposure over a certain period of time, which has practically no effect on human health and does not cause... ... Human ecology

An indicator characterizing the danger of a pollutant for humans; is determined by the formula: J=log A S/a M (MPC), where A is the atomic weight of the corresponding element; M is the molecular weight of the chemical compound that contains this element; S... ... Ecological dictionary

PESTICIDES is a collective term covering all chemicals used to control various types of pests. Pesticides currently also include plant growth regulators, insects and many other substances. Behavior... ... Pesticides and plant growth regulators

RD 03-26-2007: Guidelines for assessing the consequences of emergency releases of hazardous substances- Terminology RD 03 26 2007: Guidelines for assessing the consequences of emergency releases of hazardous substances: “Heavy” gas is a mixture of air, gas phase and droplets of a hazardous substance, the density of which is higher than the density of the surrounding air. Definitions... ... Dictionary-reference book of terms of normative and technical documentation

GOST R 22.0.05-94: Safety in emergency situations. Man-made emergencies. Terms and Definitions- Terminology GOST R 22.0.05 94: Safety in emergency situations. Man-made emergencies. Terms and definitions original document: 3.1.3 accident: A dangerous man-made incident that creates at an object, a certain territory or... ... Dictionary-reference book of terms of normative and technical documentation

MPC - maximum permissible concentration of a substance in the arable soil layer, mg/kg. This concentration should not cause direct or indirect negative effects on human health, as well as on the self-purifying ability of the soil.
The issue of establishing maximum permissible concentrations for pollutants in soils is very complex. On the one hand, the soil cover is a medium much less mobile than surface water and the atmosphere, and the accumulation of chemical compounds entering the soil can occur over a long period of time, gradually approaching the maximum permissible concentrations. Therefore, the main factor in determining maximum permissible emissions (MPE) for any enterprise or group of enterprises should be the expected operating time during which the amount of emitted pollutant will accumulate in the soil of adjacent territories, reaching the MPC. On the other hand, the active microbiological life of the soil and the physical and chemical processes occurring in it contribute to the transformation of foreign substances entering the soil, and the direction and depth of this process are determined by many factors. In some cases, the destruction and migration of pollutants is so small that they can be neglected; in other cases, the results of the processes of degradation and migration of foreign chemical compounds in the soil are comparable to the rate of entry, and the limit of their accumulation in the soil is determined by the balance between the process of entry of pollutants and removal as a result of destruction or migration. Thus, the maximum permissible concentration of pollutants in soils is determined not only by the chemical nature and toxicity, but also by the characteristics of the soils themselves. Unlike air and water, soils of the zonal genetic series are so different from each other in chemical composition and properties that unified MPC levels cannot be established for them. These levels should vary depending on the bioclimatic features of the natural zone, soil properties, cultivated crops, fertilizer systems, agricultural technology, etc.
The principles of regulation of chemical soil pollution are somewhat different from those adopted for atmospheric air and natural waters, since the entry of harmful substances into the human and animal body directly from the soil occurs in exceptional cases and in small quantities. Basically, chemical compounds found in the soil enter the body through other substrates in contact with the soil - water, air, plants. Therefore, when determining the maximum permissible concentration of pollutants in the soil, special attention is paid to those compounds that can migrate into the atmosphere, ground or surface water or accumulate in plants, reducing the quality of agricultural products.
The soil also differs from other components of the biosphere in that pollutants enter it not only with atmospheric precipitation, irrigation water, as part of ballast substances and various wastes, but are also introduced as fertilizers and pesticides. At the same time, it is difficult to trace trends in changes in pollution levels in soils, since this requires long-term observations. The only exception is some types of pesticides that can quickly decompose under the influence of external factors. The currently established standards for their content in soil are given in Table. 2.1.5.
Particular attention is paid to the development of standards for the content of HMs in soil, which negatively affect soil processes, soil fertility and the quality of agricultural productivity of soils contaminated with HMs - one of the most difficult problems of protecting biocenoses.
MPC of pesticides in soil, mg/kg of air-dry soil
(SanPiN 42-128-4275-87)
Table 2.1.5

Pesticides	MPC	Pesticides	MPC
Agelon	0,15	Iodofenphos	0,5
Acrex	1,0	Karbofos	2,0
Atrazine	0,5	Linuron	1,0
Bazudin	0,1	Metathion	1,0
Betanal	0,25	Metaphos	0,1
Gamma-HCCH (lindane)	0,1	Monuron	0,3
HCH	0,1	Polytriazine	0,1
Heptachlor	0,05	Polychlorcamphene	0,5
Heterophos	0,05	Polychlorpinene	0,5
Glyphosate	0,5	Propanide	1,5
2.4 D (acid)	0,1	Ronit	0,8
2.4 D (dichlorophenol)	0,05	Sevin	0,05
2.4 D (amine salt)	0,25	Semeron	0,1
2.4 D (butyl ether)	0,15	Simazine	0,2
2,4 D (crotyl ester)	0,15	Phosfamide	0,3
2.4 D (octyl ether)	0,15	Phthalofos	0,1
		Chlorophos	0,5

As a result of the lack of an objective assessment of the soil-ecological state of the territory, different researchers have established different levels of soil phytotoxicity (Table 2.1.6).
Table 2.1.6
Total concentrations of microelements in the surface layer
soils considered to be limiting for phytotoxicity,
mg/kg dry weight (Kabata-Pendias, Pendias, 1989)

Element	Concentration (according to various authors)
	Kowalski	/>El-Bassam	Linzon	Kabata-Pendias	Kloke	Kitagischi
Ag	-	-	2	-	-	-
As	-	50	25	30	20	15
B	30	100	-	100	25	-
Cd	-	5	8	5	3	-
Cr	-	100	75	1000	100	-
Cu	60	100	100	100	100	125
Fe	-	500	-	1000	200	-
Hg	-	5	0,3	5	2	-

The real threat to ecosystems is not the total content of toxicants, but the content of their mobile forms, therefore, in recent years, medical hygienists have been standardizing not only the total content of pollutants, but also the concentration of mobile forms.
Currently, maximum permissible concentrations (MAC) and approximate permissible concentrations (ATC) for the content of heavy metals in soils have been established for a number of heavy metals (Tables 2.1.7, 2.1.8) (Generalized..., 1990; GN 2.1.7.020- 94).
Table 2.1.7
Maximum permissible concentrations (MPC) of heavy metals in soils, mg/kg (Generalized..., 1990)

Metal	UDC (PDK)	Element Shape
1	2	3
Arsenic	2,0	Gross content
Mercury	2,1	»
Lead	32,0	»
Lead + mercury	20,1 + 1,0	»
Chromium(VI)	0,05	»
Manganese	1500	»
Vanadium	150	»
Manganese + vanadium	1000 +100	»
Antimony	4,5	»
Copper	3,0	Movable joints
Nickel	4,0	»
Zinc	23,0	»
Cobalt	5,0	»
Chromium	6,0	»

Table 2.1.8

Approximate permissible concentrations (APC) of heavy metals
and arsenic in soils, mg/kg (GN 2.1.7.020-94)

Element	Group	UEC with	Aggregate	Classes	Peculiarities
	soils	taking into account	state of matter	dangers	actions on
		background	in soils		organism
Ni	A) sandy	20	Solid: in the form	2	For warm-blooded and
	and sandy loam		salts, in		person
	B) sour	40	sorbed		low toxic.
	(loamy		form, as part of		Oxidase inhibitor.
	and clayey ones),		minerals		Possesses
	pH KCllt;5.5				mutagenic
	B) close to neutral, neutral (loamy and clayey ones), pH KClgt;5.5	80			action
Cu	A) sandy	33	Solid: in the form	2	Increases
	and sandy loam		salts,		cellular
	B) sour	66	organomineral		permeability,
	(loamy		connections, in		inhibits
	and clayey ones),		sorbed		glutathione reductase,
	pH KCllt;5.5		form, as part of		violates
	B) close to	132	minerals		metabolism,
	neutral,				interacting with
	neutral				-SH, -NH2 and -COOH
	KClgt;5.5				groups
Zn	A) sandy	55	Solid: in the form	1	Lack or
	and sandy loam		salts,		excess cause
	B) sour	110	organomineral		deviations in
	(loamy		connections, in		development.
	and clayey ones),		sorbed		Poisoning with
	pH KCllt;5.5		form, as part of		violation
	B) close to	220	/>minerals		technologies
	neutral,				making
	neutral				zinc-containing
	(loamy and clayey), pH KClgt;5.5				pesticides
As	A) sandy	2	Solid: in the form	1	Poisonous substance
	and sandy loam		salts,		inhibitory
	B) sour	5	organomineral		various
	(loamy		connections, in		enzymes,
	and clayey ones),		sorbed		negative

Element	Group	UEC with	Aggregate	Classes	Peculiarities
	soils	taking into account	state of matter	dangers	actions on
		background	in soils		organism
	pH KCllt;5.5		form, as part of		action on
	B) close to	10	minerals		metabolism.
	neutral,				Maybe
	neutral				carcinogenic
	(loamy and clayey), pH KClgt;5.5				action
Cd	A) sandy	0,5	Solid: in the form	1	Highly poisonous
	and sandy loam		salts,		substance,
	B) sour	1,0	organomineral		blocks
	(loamy		connections, in		sulfhydryl
	and clayey ones),		sorbed		groups of enzymes,
	pH KCllt;5.5		form, as part of		disrupts exchange
	B) close to	2,0	minerals		iron and calcium,
	neutral,				disrupts synthesis
	neutral (loamy and clayey), pH KClgt;5.5				DNA
Pb	A) sandy	32	Solid: in the form	1	Versatile
	and sandy loam	/>	salts,		negative
	B) sour	65	organomineral		action.
	(loamy		connections, in		Blocks -SH
	and clayey ones),		sorbed		protein groups,
	pH KCllt;5.5		form, as part of		inhibits
	B) close to	130	minerals		enzymes,
	neutral,				causes
	neutral				poisoning,
	(loamy				nervous system lesions
	and clayey), pH KClgt;5.5				systems

The accepted background contents of elements in the main types of soils, according to the letter of the Center for Scientific Research of the State Committee for Nature Protection of the RSFSR dated December 18, 1990 No. TsS-299/15-73, are given in Table 2.1.9 (Generalized..., 1990).

Table 2.1.9
Background contents of elements in soils, mg/kg (Generalized..., 1990)

Soil type	V	Cd	Co	Mn	Cu	Mo	Ni	Sn	Pb	Cr	Zn
Humus carbonate, zheltozems, red soils	73	-	-	440	22	-	31	2,5	-	55	-
Dernovo podzolic	72	-	-	650	23	1,5	51	-	19	140	49
Chestnut	120	-	25	800	28	1,7	58	6	30	120	70
Serozems	-	-	-	-	-	-	12	-	25	-	-
Chernozems	-	0,3	-	-	18	-	54	-	18	-	37
Gray black soils	-	0,6	-	-	14	-	37	-	17	-	45
Brown	80	0,25	12	860	13	2	14	13	23	54	52
Serozems	30	-	-	300	19	-	16	14	20	31	69
Soils of the world	50	0,5	10	850	20	2	40	10	10	200	50
Chernozems	-	-	-	300 360	12 13	-	37 54	-	-	440	30 80

When the permissible content of heavy metals in soils is exceeded, these elements accumulate in plants in quantities exceeding the maximum permissible concentrations in feed and food products.

All documents presented in the catalog are not their official publication and are intended for informational purposes only. Electronic copies of these documents can be distributed without any restrictions. You can post information from this site on any other site.

Federal Service for Supervision of Consumer Rights Protection and Human Welfare

2.1.7. SOIL, CLEANING PLACES, PRODUCTION AND CONSUMPTION WASTE SOIL SANITARY PROTECTION

Maximum permissible concentrations (MPC) of chemicals in soil

Hygienic standards
GN 2.1.7.2041-06

1. Prepared by a team of authors consisting of: N.V. Rusakov, I.A. Kryatov, N.I. Tonkopiy, J.J. Gumarova, N.V. Pirtakhiya (State Research Institute of Human Ecology and Environmental Hygiene named after A.N. Sysin, Russian Academy of Medical Sciences); A.P. Vesyoloye (Federal Service for Supervision of Consumer Rights Protection and Human Welfare).

2. Recommended for approval by the Bureau of the Commission on State Sanitary and Epidemiological Standards under the Federal Service for Surveillance on Consumer Rights Protection and Human Welfare (Protocol No. 2 of June 16, 2005).

3. Approved by the Head of the Federal Service for Surveillance in the Field of Protection of Consumer Rights and Human Welfare, Chief State Sanitary Doctor of the Russian Federation G.G. Onishenko January 19, 2006

4. Entered into force by Decree of the Chief State Sanitary Doctor of the Russian Federation dated January 23, 2006 No. 1 from April 1, 2006.

5. Introduced to replace the hygienic standards “List of maximum permissible concentrations (MAC) and approximate permissible quantities (APQ) of chemicals in soil” No. 6229-91 and GN 2.1.7.020-94 (addition 1 to No. 6229-91).

6. Registered with the Ministry of Justice of the Russian Federation (registration number 7470 dated February 7, 2006).

Federal Law of the Russian Federation
“On the sanitary and epidemiological well-being of the population”
No. 52-FZ dated March 30, 1999

“State sanitary and epidemiological rules and regulations (hereinafter referred to as sanitary rules) - regulatory legal acts establishing sanitary and epidemiological requirements (including criteria for the safety and (or) harmlessness of environmental factors for humans, hygienic and other standards), non-compliance with which creates threat to human life or health, as well as the threat of the emergence and spread of diseases” (Article 1).

“Compliance with sanitary rules is mandatory for citizens, individual entrepreneurs and legal entities” (Article 39, paragraph 3).

CHIEF STATE SANITARY DOCTOR OF THE RUSSIAN FEDERATION

RESOLUTION

01/23/06 Moscow №1

About implementation
hygienic standards
GN 2.1.7.2041-06

Based on the Federal Law of March 30, 1999 No. 52-FZ “On the sanitary and epidemiological welfare of the population” (Collected Legislation of the Russian Federation, 1999, No. 14, Art. 1650; 2003, No. 2, Art. 167; No. 27, Art. 2700 ; 2004, No. 35, Art. 3607) and the Regulations on state sanitary and epidemiological regulation, approved by Decree of the Government of the Russian Federation of July 24, 2000 No. 554 (Collection of Legislation of the Russian Federation, 2000, No. 31, Art. 3295) as amended Decree of the Government of the Russian Federation dated September 15, 2005 No. 569 (Collection of Legislation of the Russian Federation, 2005, No. 39, Art. 3953)

I DECIDE:

1. Put into effect from April 1, 2006 the hygienic standards GN 2.1.7.2041-06 “Maximum permissible concentrations (MAC) of chemicals in soil”, approved by the Chief State Sanitary Doctor of the Russian Federation on January 19, 2006.

G.G. Onishchenko

I APPROVED

Head of the Federal Service
for supervision in the field of rights protection
consumers and human well-being,
Chief State Sanitary
doctor of the Russian Federation

G.G. Onishchenko

2.1.7. SOIL, CLEANING PLACES, PRODUCTION AND CONSUMPTION WASTE, SOIL SANITARY PROTECTION

Maximum permissible concentrations (MPC) of chemicals in soil

Hygienic standards
GN 2.1.7.2041-06

I. General provisions and scope

1.1. Hygienic standards "Maximum permissible concentrations (MAC) of chemical substances in the soil" (hereinafter referred to as standards) were developed in accordance with the Federal Law of March 30, 1999 N 52-FZ "On the sanitary and epidemiological welfare of the population" (Collected Legislation of the Russian Federation, 1999, N 14, Art. 1650; 2003, Art. 167; Art. 2700; 2004, N 35) and the Regulations on state sanitary and epidemiological regulation, approved by Decree of the Government of the Russian Federation of July 24, 2000 N 554 Russian Federation, 2000, No. 31, Art. 3295) as amended by Decree of the Government of the Russian Federation of September 15, 2005 No. 569 (Collection of Legislation of the Russian Federation, 2005, No. 39, Art. 3953)

1.2. These standards are valid throughout the Russian Federation and establish maximum permissible concentrations of chemical substances in the soil of different types of land use.

1.3. The standards apply to the soils of populated areas, agricultural lands, sanitary protection zones of water supply sources, resort areas and individual institutions.

1.4. These standards have been developed on the basis of comprehensive experimental studies of the danger of indirect effects of a soil pollutant on human health, as well as taking into account its toxicity, epidemiological studies and international standardization experience.

1.5. Compliance with hygiene standards is mandatory for citizens, individual entrepreneurs and legal entities.

II. Maximum permissible concentrations (MPC) of chemicals in soil

№№	Name of substance	N CAS	Formula	MPC value (mg/kg) taking into account background (clark)	Limiting indicator of harmfulness
Gross content
	Benz/a/pyrene	50-32-8	C 20 N 12	0,02	General sanitary
	Petrol	8032-32-4			Air migration
	Benzene	71-43-2	C 6 H 6		Air migration
	Vanadium	7440-62-2		150,0	General sanitary
	Vanadium+manganese	7440-62-2+7439-96-5	V+Mn	100+1000	General sanitary
	Dimethylbenzenes (1,2-dimethylbenzene; 1,3-dimethylbenzene; 1,4-dimethylbenzene)	1330-20-7	C 8 H 10		Translocation
	Complex granular fertilizers (KGU)			120,0	Water migration
	Complex liquid fertilizers (CLF)			80,0	Water migration
	Manganese	7439-96-5	MP	1500	General sanitary
	Methanal	50-00-0	CH 2 O		Air migration
	Methylbenzene	108-88-3	C 7 H 8		Air migration
	(1-methylethenyl)benzene	25013-15-4	C 9 H 10		Air migration
	(1-methylethyl)benzene	98-82-8	C 9 H 12		Air migration
	(1-methylethyl)benzene + (1-methylethenyl)benzene	98-82-8 + 25013-15-4	C 9 H12 + C 9 H 10		Air migration
		7440-32-2			Translocation
	Nitrates (by NO 3)	14797-55-8	NO 3	130,0	Water migration
	Coal flotation waste (CFW)			3000,0	Water migration
					General sanitary
	Mercury	7439-97-6			Translocation
		7439-92-1		32,0	General sanitary
	Lead + mercury	7439-92-1 + 7439-97-6	Pb+Hg	20,0+1,0	Translocation
	Sulfur	7704-34-9		160,0	General sanitary
	Sulfuric acid (according to S)	7664-93-9	H2SO4	160,0	General sanitary
	Hydrogen sulfide (according to S)	7783-06-4	H2S		Air migration
	Superphosphate (by P 2 O 5)			200,0	Translocation
	Antimony	7440-36-0			Water migration
	Furan-2-carbaldehyde	39276-09-0	C5H4O2		General sanitary
	Potassium chloride (by K 2 O)	7447-40-7		360,0	Water migration
	Chromium hexavalent	18540-29-9	Сr(+6)	0,05	General sanitary
	Ethanal	75-07-0	C2H4O		Air migration
	Ethenylbenzene	100-42-5	C 8 H 8		Air migration
Movable form
		7440-48-4	Co		General sanitary
	Manganese extracted by 0.1 n H 2 SO 4:
	Chernozem			700,0
	Sod-podzolic:
	pH 4.0			300,0
	pH 5.1 - 6.0			400,0
	pH ³ 6,0			500,0
	Extractable with ammonium acetate buffer pH 4.8:	7439-96-5			General sanitary
	Chernozem			140,0
	Sod-podzolic:
	pH 4.0			60,0
	pH 5.1 - 6.0			80,0
	pH ³ 6,0			100,0
	Copper 5	7440-50-8			General sanitary
	Nickel 5	7440-02-0			General sanitary
	Lead 5	7439-92-1			General sanitary
	Fluorine 6	16984-48-8			Translocation
	Chromium trivalent 5	16065-83-1	Сr(+3)		General sanitary
	Zinc 5	7440-66-6		23,0	Translocation
Water soluble form
	Fluorine	16984-48-8		10,0	Translocation

Notes

1. KGU - complex granular fertilizers with the composition N:P:K=64:0:15. The KSU MAC is controlled by the nitrate content in the soil, which should not exceed 76.8 mg/kg of absolutely dry soil.

KZhU - complex liquid fertilizers of the composition N:P:K=10:34:0 TU 6-08-290-74 with manganese additives no more than 0.6% of the total mass. The maximum permissible concentration for liquid phosphates is controlled by the content of mobile phosphates in the soil, which should not exceed 27.2 mg/kg of absolutely dry soil.

2. Standards for arsenic and lead for different types of soil are presented as approximate permissible concentrations (APC) in another document.

3. MPC of OFU is controlled by the content of benzo/a/pyrene in the soil, which should not exceed the MPC of benzo/a/pyrene.

4. The mobile form of cobalt is extracted from the soil with a sodium acetate buffer solution with pH 3.5 and pH 4.7 for gray soils and an ammonium acetate buffer solution with pH 4.8 for other types of soils.

5. The mobile form of the element is extracted from the soil with an ammonium acetate buffer solution with a pH of 4.8.

6. Mobile form of fluoride is extracted from soil pH£ 6.5 0.006 n HCl, with pH >6.5 - 0.03 n K 2 SO 4.

Notes to Section II

The names of individual substances are given in alphabetical order, where possible, in accordance with the rules of the International Union of Pure Applied Chemistry (IUPAC). IU PAC) (Column 2) and are provided with Chemical Abstracts Service (CAS) registration numbers (Column 3) to facilitate identification of substances.

Column 4 shows the formulas of the substances.

The values ​​of the Standards are given in milligrams of the substance per kilogram of soil (mg/kg) - column 5 - for gross and mobile forms of their content in the soil.

The limiting hazard indicator is indicated (column 6), according to which standards are established: air-migration (air-mig.), water-migration (water-mig.), general sanitary or translocation.

For ease of use of the standards, an index of main synonyms (Appendix 1), formulas of substances (Appendix 2) and CAS numbers (Appendix 3) is provided.

1. GOST 26204-84, GOST 28213-84 “Soils. Methods of analysis".

2. Dmitriev M.T., Kaznina N.I., Pinigina I.A. Sanitary-chemical analysis of pollutants in the environment: Handbook. M.: Chemistry, 1989.

3. Methodology for determining furfural in soil No. 012-17/145 / Ministry of Health of the UzSSR dated March 24, 1987. Tashkent, 1987.

4. Guidelines for the qualitative and quantitative determination of carcinogenic polycyclic hydrocarbons in products of complex composition No. 1423-76 dated 05/12/76. M., 1976.

5. Guidelines for sampling from environmental objects and preparing them for subsequent determination of carcinogenic polycyclic aromatic hydrocarbons: No. 1424-76 dated 05/12/76.

6. Maximum permissible concentrations of chemicals in soil: No. 1968-79 / Ministry of Health of the USSR dated 02.21.79. M., 1979.

7. Maximum permissible concentrations of chemicals in soil: No. 2264-80 dated October 30, 1980 / Ministry of Health of the USSR. M., 1980.

8. Maximum permissible concentrations of chemicals in soil (MPC): No. 2546 of 04/30/82 / Ministry of Health of the USSR. M., 1982.

9. Maximum permissible concentrations of chemicals in soil (MPC): No. 3210-85 dated 02/01/85 / Ministry of Health of the USSR. M., 1985.

10. Sanitary standards for permissible concentrations of chemicals in soil: SanPiN 42-128-1433-87 / Ministry of Health of the USSR. M., 1988.

11. Determination of organic substances in soil and production and consumption waste: Sat. MUK 4.1.1061 - 4.1.1062-01. M.: Federal Center for State Sanitary and Epidemiological Supervision of the Ministry of Health of Russia, 2001.

12. Workshop on agrochemistry / Ed. acad. RAAS V.G. Mineeva. M.: MSU, 2001.

Appendix 1 (for reference)

Index of main synonyms and their serial numbers in the table

Xylenes (ortho-, meta-, para-)		a-methylstyrene
Formaldehyde		Furfural
Toluene		Acetaldehyde

The use of unified methodological approaches will help obtain comparable data when assessing the level of soil pollution and the possible consequences of pollution, and will also make it possible to predict the quality of food products of plant origin. The accumulation of factual material on soil pollution and its indirect impact on humans will make it possible to subsequently improve the proposed guidelines.

These guidelines do not apply to the assessment of pesticide contamination.

1. General Provisions

1.1. From a hygienic point of view, the danger of soil contamination with chemicals is determined by the level of its possible negative impact on contacting media (water, air), food products and indirectly on humans, as well as on the biological activity of the soil and its self-purification processes.

1.2. The main criterion for hygienic assessment of the danger of soil pollution by harmful substances is the maximum permissible concentration (MPC) of chemicals in the soil. MPC is a comprehensive indicator of the content of chemical substances in the soil that is harmless to humans, since the criteria used in their scientific substantiation reflect all possible ways of indirect exposure of the pollutant to contact media, the biological activity of the soil and its self-purification processes. In this case, each of the exposure routes is assessed quantitatively with justification for the permissible level of substance content for each hazard indicator. The lowest reasonable level of content is limiting and is taken as the maximum permissible concentration of the substance, since it reflects the most vulnerable route of exposure to this toxicant.

1.3. To assess the danger of soil pollution, the choice of chemical substances - pollution indicators - is carried out taking into account:

Specifics of pollution sources that determine the complex of chemical elements involved in soil pollution in the studied region (Appendix 1);

Priority of pollutants in accordance with the list of maximum permissible concentrations of chemicals in soil (Table 2) and their hazard class (Appendix 2) (“Maximum permissible concentrations of chemicals in soil”, 1979, 1980, 1982, 1985, 1987);

The nature of land use (Appendix 3).

1.3.1. If it is not possible to take into account the entire complex of chemical substances that pollute the soil, the assessment is carried out based on the most toxic substances, i.e. belonging to a higher hazard class (Appendix 2).

1.3.2. If the given documents (Appendix 2) do not contain the hazard class of chemicals that are priority for the soils of the surveyed area, their hazard class can be determined by the hazard index (Appendix 4).

1.4. Soil sampling, storage, transportation and preparation for analysis are carried out in accordance with GOST 17.4.4.02-84 "Nature conservation. Soils. Methods for collecting and preparing soil samples for chemical, bacteriological and helminthological analysis."

1.5. The determination of chemical substances in soil is carried out by methods developed to justify their MPCs in soil and approved by the USSR Ministry of Health, which are published in the appendices to the “Maximum Permissible Concentrations of Chemicals in Soil (MPC)” (1979, 1980, 1982, 1985).