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International Medical Scientific Journal       Issue-2 

10.5281/zenodo.5537109  

 147 

    



Art of Medicine           Volume-1 

International Medical Scientific Journal       Issue-2 

10.5281/zenodo.5537109  

 148 

 

Art of Medicine International Medical Scientific journal 

 

Founder and Publisher Pascual Izquierdo-Egea 

Published science may 2021 year. Issued Quarterly. 

Internet address: http://artofmedicineimsj.us 
E-mail: info@artofmedicineimsj.us 

11931 Barlow Pl Philadelphia, PA 19116, USA +1 (929) 266-0862 

 

 
  



Art of Medicine           Volume-1 

International Medical Scientific Journal       Issue-2 

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Results of assessment of class and degree of harmfulness of working conditions 

of medical workers, indexed by complexity and severity of the work process 

 

Sabirova G.A., Sadikov A.U., Khamrakulova M.A., Sadikov U.A. 

 
Research Institute of Sanitation, Hygiene and Occupational Diseases, Ministry of 

Health of the Republic of Uzbekistan Fiscal Institute under the State Tax Committee 

Republic of Uzbekistan 

 
Abstract 

The article presents the results of the study of working conditions of the 

workers of the Gissar oil and gas field in the Kashkadarya region of Uzbekistan, with 
the definition of the complex of unfavorable production factors at the main.  

According to studies, it was found that the body of workers in oil and gas 

production is affected by a number of adverse factors: the presence in the air of the 

working area of chemicals, noise, vibration, adverse microclimate, especially heating 
in the warm period and cold in winter, insufficient and uneven lighting, increasing 

stressful nature of the labor process. The impact of the above-mentioned production 

factors on the body of workers can cause the development of occupational and 
occupational diseases. 

Keywords: Oil and gas industry, working conditions, meteorological 

conditions, chemical factors, noise and vibration. 

In the light of structural transformations in the economy of the Republic of 
Uzbekistan, aimed at modernization and technical re-equipment of industries and 

enterprises, the most complete and efficient use of the rich natural potential of the 

country, the formation of export-oriented and import-substituting industries, the oil 
and gas industry occupies a priority place. The modern level of working conditions is 

characterized by improvements in technology and equipment.  

However, we do not imagine it is possible to completely exclude the negative 

impact of production factors on the body of workers. In the process of labor activity 
persons working in the oil and gas industry come into contact with components of 

multisulfur oil and oil products, physical factors and heating microclimate, which has 

a very adverse effect on the health of workers [4, 5]. 
Earlier studies on the health of the population employed or residing in the 

territory of oil refining areas revealed its negative changes at the level of neurological 

status and skin [1, 6, 18]. In view of this situation, the management of oil and gas 

refineries began to pay special attention to the problem of environmental protection 
and public health [3]. Numerous studies indicate that the impact of adverse working 

conditions on workers can be manifested by an increase in general medical morbidity, 

reduced life expectancy, early aging, increased mortality [8, 13]. It is known that 
chemical factors present at oil refineries have an adverse effect on the health of 

workers [11]. 



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The authors have studied working conditions and labor protection of oil 

workers in Kazakhstan. They established that the number of injured at work remains 
quite high and it is connected with such factors as production culture, technological 

and production discipline, availability of individual protective equipment, availability 

of special clothes and special footwear, good work organization [12]. Industrial 

injuries are still high in the industry, the main causes of which are considered to be 
the deterioration of production technology, weakening of departmental control, 

reduction of labor protection services at enterprises, depreciation of fixed assets, 

reduction of funding for safety [7].  

In order to preserve and protect the environment it is necessary to restore 
natural resources, it is necessary to carry out environmental control in the oil 

companies for emissions of pollutants, for water discharges, for the development of 

fauna and flora [9]. According to some authors, acidic products of some chemical 
industries, penetrating by air into the body, undoubtedly affect the cell membranes of 

the body, primarily red blood cells. Workers of these enterprises have the most 

significant changes, reflecting the adaptation reactions to harmful industrial factors 

[10].  
Studies on the study of hygienic assessment of working conditions of gas 

industry workers revealed early changes in the nervous system in workers. The author 

found that natural gas has a toxic effect on the central nervous system with the 
development of astheno-neurotic syndrome or vegetative dystonia [2, 15]. The degree 

of toxic damage of the nervous system, as well as in other occupational diseases, is 

determined by the length of service at the enterprise.  

Of the complex of adverse production factors the chemical components 
prevailed: hydrogen sulfide, hydrocarbons, ethylene glycol, ammonia, 

monoethanolamine, which in some shops exceeded the maximum allowable 

concentrations (MAC) on the average values, but their maximum values in some 
samples significantly exceeded the MAC [17].  

Despite the improvement of oil exploration and oil production technologies and 

the improvement of working and living conditions of shift workers, in most cases 

their working and living conditions associated with exposure to climatic and 
production factors are harmful and dangerous [9]. Temperature factor, physical loads, 

high air humidity are dangerous for workers' health. A group of authors proposed a 

developed and tested system of industrial preventive medicine, taking into account 
the specifics of gas industry and extreme climatic conditions of high northern 

latitudes, which gives an opportunity of targeted prevention of diseases and recovery 

of workers' health, prolongation of professional longevity [12, 16]. 

Research Objective: Assessment of working conditions and levels of harmful 
factors at the main oil and gas production sites of Gissar.  

Research material and methods: The main unfavorable factors of the 

working environment in oil and gas production are chemical and physical (noise and 
vibration) factors, as well as unfavorable meteorological conditions. Taking into 

account the purpose of the study, we studied the main chemical factors in the working 

areas as a factor determining the functional state of the digestive organs. 



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Study of working conditions of workers engaged in extraction, processing and 

transportation of natural gas was conducted according to SanPiN № 0141-03 
«Hygienic classification of working conditions according to indicators of harmfulness 

and hazard of factors of industrial environment». Concentration of chemical 

substances in the air of working zone of Gissar oil and gas production fields was 

determined in accordance with GOST 12.1.005, and the results were evaluated in 
accordance with the requirements of SanPiN RUz №0209-06 «Sanitary rules and 

hygienic requirements for oil industry». 

Noise was evaluated on the basis of SanPiN RUz №0325-16 «Sanitary norms 

of permissible noise levels in workplaces», and vibration was evaluated on the basis 
of SanPiN RUz №0326-16 «Sanitary norms of general and local vibration in 

workplaces». 

Results and their discussion: We studied the working conditions of workers 
at modern oil and gas producing branches of the republic by the example of one of 

the largest divisions of LUKOIL Uzbekistan Operating Company, South-West 

Gissar. The Southwest Gissar project includes seven fields, of which the main ones 

are Adamtash, Gumbulak and Dzharkuduk-Yangi Kyzylcha, as well as several other 
areas. The fields are located in the mountainous regions of the Kashkadarya region, 

near the border with Tajikistan, and in addition to gas contain oil and condensate 

reserves. 
Noise and vibration parameters at the main objects of Gissar field are presented 

in Table 1. 

The table shows that the objects of special noisiness (85-110dBA) are the site 

of gas extraction and treatment Adamtash (94,0±1,41 dBA), oil and gas extraction 
shop (92,0±1,38), industrial and technological service (92,2±1,5 dBA), gas extraction 

and complex treatment area Gumbulak - Jarkuduk (94±1,52 dBA). Noise level at the 

above-mentioned objects exceeds MPL from 10 to 15 dBA. 
 

 

Table 1. 

Noise level at the oil and gas production sites  
Gissar field 

№ Measurement location Maximum 

permissible 

level 

Equivalent 

sound 

level, 

dBA 
(M±m) 

Class of 

working 

conditions 

1 Oil and Gas Production Shop 80 92±1,38 3.2 

2 Production and technological service 80 92,2±1,50 3.2 

3 Chemicalization Department 80 75±1,67 2 

4 Chemical and analytical laboratory 80 72±1,15 2 

5 Transportation section 80 82±2,07 3.1 

6 Gumbulak-Jarkuduk production and 80 94±1,52 3.2 



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comprehensive gas treatment facility 

7 Adamtash gas production and 
treatment section 

80 94±1,41 3.2 

8 Pipeline and metering units operation 

section 

80 84±2,43 3.1 

9 Central dispatch service 80 75±2,88 2 

10 Instrumentation, Control and 

Metrology Department 

80 75±3,16 2 

11 IT and Communications Service 80 72±1,36 2 

12 Technological equipment repair unit 80 85±3,49 3.1 

13 Mechanical-repair shop team 80 78,2±1,39 2 

 

At the transport section, as well as in the sections of operation of pipelines and 

metering units, on repair of technological equipment and repair-technological 

workshop brigade, a slight increase of the maximum permissible level of noise is 
observed, on average from 82±2,07 to 85,0±3,49 dBA. At the other facilities and sites 

(chemicalization team, chemical-analytical laboratory, central dispatcher service, 

instrumentation and metrology site, communication service) the noise level is lower 
than the permissible level by 5-15 dBA.  

Our measurements of vibration at the main working places showed the 

following: the parameters of general vibration were depending on the technical 

features of the equipment (power, number of revolutions and shocks). The highest 
frequency of vibration was detected on the transport area for car drivers, in the 

premises of the repair-mechanical workshop on the working places of the foreman for 

repair of technological equipment, fitter for repair of technological installations and 

general machinist the level of general vibration exceeded MPL from 10 to 36 Hz (tab. 
2.).   

Table 2 

Vibration levels at workplaces  
Oil and Gas Production Field Gissar 

Shop, work place Type 
vibrati

on/ 

catego

ry 

Direction 
actions 

Maxim
um 

permis

sible 

level, 
dB  

Equivalent 
corrected 

vibration 

velocity 

level, dB 

Duration of 
exposure 

(hours %) 

Class 
of 

worki

ng 

condit
ions 

1 2 4 5 6 7 8 
 Transport area  

Driver of the car 

(passenger car) 

I General 107 88 80 2 

 Local 112 104  2 

Operator of truck lifts 

and hydraulic elevator 

 

II General 101 104 80 3.1 

 Local 112 108  2 

Hydraulic crane operator  II General 101 109 80 3.1 



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 In all workplaces of the transport section the level of local vibration was low 
by 2-8 dB in relation to MPL (112 dB). In the repair-mechanical workshop team the 

highest vibration frequency was observed in the rooms and workshop for repair of 

technological equipment, the fitter for repair of technological installations was lower 
than the MPL by 36 Hz, and in the workplace of the electric welder the local 

vibration level was higher by 3-20 Hz (MPL - 115-128 Hz). 

 Study of meteorological conditions during the observation period in the oil and 

gas production industry, which was carried out in the following areas: oil and gas 
production shop; production and technological service; chemistry team; chemical and 

analytical laboratory; tractor shop; production and comprehensive gas treatment; gas 

production and treatment area; pipeline operation; central control room; metrology 
area; IT service; mechanics repair of process equipment; repair and mechanical 

workshop team. Changing meteorological conditions were conducted 3 times during 

the working day: at 800, 1200 and 1600 hours at the field workplaces.  

At investigated sites of oil and gas extraction industry in the hot period of year 
(July) there were sharp changes of indicators of physical factors (temperature, 

relative humidity of air, speed of air movement). At the same time, in the workshops 

of oil and gas production and in other open sections the air temperature during the 

day (1600 hours) was at the level of 36,8 – 42,8
o
C, at other closed sections the air 

temperature ranged from 25,8±0,26 to 26,8±0,22
o
C. Relative humidity in the above 

(closed) sections ranged from 15,4 to 18,2%, and air velocity from 1,1 to 1,2 m/s. The 

study of the microclimate of workplaces in open areas showed that the maximum air 
temperature during the warm season ranged from 38°C to 42°C. Relative humidity, 

  Local 112 107  2 

Operator of mobile 

steam dewaxing units 

III «а» General 92 104 80 3.2 

 Local 112 105  2 

Operator of mobile 

compressor 

 

III «а» General 92 105 80 3.2 

 Local 112 107  2 

Operator of a bulldozer II General 101 106 80 3.1 

 Local 112 108  2 

Cementing machine 

operator 

III «а» General 92 88 80 2 

 Local 112 

 

 

104  2 

 Repair and mechanical workshop team  

Master of repair of 

technological equipment 

II General 101 65 20 2 

Technological systems 

fitter 

II General 101 65 60 2 

General machine 

operator 

III «а» Local 112  92 60 2 

Automotive mechanic III «а» Local 112  92 60 2 



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the highest in the morning hours (29%). The speed of air movement was determined 

on average at 1,0-3,7 meters per second.  
We conducted a study of the chemical composition of oil and gas for the 

content of hydrogen sulfide, nitrogen oxide, carbon monoxide, hydrocarbon, sulfur 

dioxide and ammonia in the workplace in the oil and gas production industry in the 

study areas.  The air environment in the working zone of the main facilities (oil and 
gas production shop, production and technological service, gas production and 

preparation sections, process equipment repair section) of oil and gas production 

industry was contaminated with a complex of chemical harmful substances. 

Concentrations of hydrogen sulfide, nitrogen oxide, hydrogen oxide and hydrocarbon 
sulfide also increased at the main sites, which exceeded MPL from 1.5 to 4.32 times. 

At the other sites, the content of chemical substances was within less or permissible 

norms.  
 

Conclusion: Conducted studies of working conditions of workers in the oil and 

gas field Gissar Kashkadarya region of the Republic of Uzbekistan is characterized 

by a complex of unfavorable production factors: the presence in the air of the 
working area of chemicals, noise, vibration, unfavorable microclimate, especially 

heating in the warm period and cold in winter, which can cause a negative impact on 

the body of workers. 
 

  



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References: 

1. Agakishiev D.D. Influence of products of oil refining industry (furfural-distillate of 
mineral oil) on the development of skin pathology in workers and measures of 

complex prevention: Author's dissertation. D. in medical sciences. - М., 1992. - 28 с.  

2. Azizkhodjaev A.A. General and neurological morbidity of workers engaged in 

mining and transportation of oil and oil products // Actual problems of hygiene, 
sanitation and ecology. -Т., 2004. - С. 220-221.  

3. Azizkhojaev A.A., Iskandarova G.T. Optimization of working conditions to 

improve the health of workers employed in compressor workshops of oil and gas 

industry // Oil and Gas. - Tashkent, 2009. - № 4. - С. 54-55.  
4. Alieva R.Kh. Labor hygiene of oil workers working on the mainland and 

continental shelf: Author's abstract. D. in Medical Sciences. - Moscow, 1991.- 41 p. 

5. Boyarchuk I.F., Goncharova O.V. Evaluation of modern methods and equipment 
used to determine the components of oil and oil products in the air // Hygiene and 

Sanitation. -2001.-№4.-С.78-79. 

6. Gainullina M.K., Sukhotina K.I. Functional state of the central nervous system in 

pregnant female workers of oil refineries // Worker's hygiene and health protection in 
the oil and chemical industry. -M., 1982.-P.85-89. 

7. Gimranova GG, Bakirov AB, Karimova LK, Beigul NA, Shaykhlislamova ER 

Factors and indicators of occupational risk in oil production // Bulletin of the Russian 
State Medical University. - 2014. - №1. - Р. 72-75. 

8. Zaidullin PB, Kildebekova RN, Vasilieva LY, Arslanova YA, Minutgazova LR 

The role of the outpatient rehabilitation stage in the correction of psycho-emotional 

state in persons with a high degree of occupational risk. // Medicine of work and an 
industrial ecology. - 2008. - № 7. - С. 40-43. 

9. Zaidullin P.P., Mukhametshin A.A., Mukhametshin F.S., Mukhametshin Z.A. 

Health preservation of the working population of the oil and gas production industry. 
// Oil and Health: a collection of scientific papers of the All-Russian conference. - 

Ufa, 2007. - С. 392-395. 

10. Ivanov A. V., Tafeeva E.A. Effectiveness of sanitary and hygienic measures in 

areas of oil production // Hygiene and sanitation. - 2004. - №1.-С. 22-25. 
11. Kamilov R. F., Shakirova E.D., Kudryavtsev V. P., Shakirov D.F. Acid and 

osmotic resistance of erythrocytes in workers employed in the production of rubber 

and rubber products petrochemical industry. (in Russian) // Labor medicine and 
industrial ecology. - 2008. - №8. - С. 11-16. 

12. Kononov V. I., Babkin V. P., Shishkina T.N., Golubkin V. K. Prophylactic 

industrial medicine for the gas-extractors of the Far North in the implementation of 

the National Project "Health" // Medicine of Labor and Industrial Ecology. - 2008. - 
№7. - С. 12-17. 

13. Mukhitdinova M. E. Hygienic assessment of working conditions of gas industry 

enterprises and the identification of early functional changes in the liver of workers: 
Author's abstract. Diss. Candidate of medical sciences. - T., 2004.-23 p. 



Art of Medicine           Volume-1 

International Medical Scientific Journal       Issue-2 

10.5281/zenodo.5537109  

 156 

14. Nursultanova L. N. The oil and gas industry of modern Kazakhstan: the historical 

aspect (1985-2007): author's dissertation doctor of historical sciences. - Almaty. - 
2008. - 45 с. 

15. Rustamov M.S. Functional changes in the eyes of workers in the gas and oil 

refining industry. Medical journal of Uzbekistan 2012 № 4 P -72-78. 

16. Setko N. P., Beylin S. M. Hygienic assessment of nutritional organization and 
nutritional status of workers of the main professions employed in the gas-oil refining 

industry // Medicine of Labor and Industrial Ecology. - 2008.-№7.-С.11-16.  

17. Ergasheva N.O., Khamrakulova M.A. Features of the influence of chemical and 

physical factors on carbohydrate-energetic metabolism in the brain // Journal of 
Theoretical and Clinical Medicine. - Tashkent, 2017. - №3. - С. 30-32 

18. MajjiAB, de Juan E Jr. Retinal pigment epithelial autotransplantation: 

morphological changes in retina and choroid // Graefes Arch Clin Exp Ophthalmol. 
2000 Sep; 238 (9): 779-91. 

19. National Toxicology Program. NTP technical report on the toxicology and 

carcinogenesis studies of 2,2',4,4',5,5'-hexachlorobiphenyl (PCB 153) (CAS No. 

35065-27-1) in female Harlan Sprague-Dawley rats (Gavage studies) //Natl Toxicol 
Program Tech Rep Ser. 2006 May; (529): 4-168. 

http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=Search&Term=%22National%20Toxicology%20Program%22%5BCorporate%20Author%5D&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVAbstract
javascript:AL_get(this,%20'jour',%20'Natl%20Toxicol%20Program%20Tech%20Rep%20Ser.');
javascript:AL_get(this,%20'jour',%20'Natl%20Toxicol%20Program%20Tech%20Rep%20Ser.');

