At JSC Bashkir Soda Company, the monitoring of atmospheric air is conducted by the Laboratory for Environmental and Sanitary-Hygienic Control (LEiSGK), which is accredited as a testing laboratory (center) under accreditation certificate No. ROSS RU.0001.515509.

The laboratory (LEiSGK) is equipped with the necessary measuring instruments and auxiliary equipment. All measuring instruments undergo timely calibration in accordance with established schedules. To ensure operational readiness, the laboratory equipment is subject to a system of technical maintenance and repair.

The LEiSGK maintains a collection of regulatory documentation required for analytical work; this collection is kept up to date, and any changes or additions are communicated to the staff.

The laboratory is adequately supplied with certified reference materials, chemical reagents, and other necessary materials.

Analyses are performed according to the following methodologies:

1. Chlorine: in accordance with RD 52.04.798-2014, "Mass concentration of chlorine in atmospheric air samples: Measurement procedure using a photometric method based on the fading of a methyl orange solution."

2. Ammonia: in accordance with RD 52.04.791-2014, "Mass concentration of ammonia in atmospheric air samples: Measurement procedure using a photometric method with sodium salicylate."

3. Hydrogen chloride: in accordance with RD 52.04.793-2014, "Mass concentration of hydrogen chloride in atmospheric air samples." Photometric measurement method.

4. Organochlorine compounds (1,2-ethylene dichloride, chloroform): per MI 73-GC-2020, "Procedure for measuring the mass concentration of organochlorine compounds in ambient air by gas-liquid chromatography." The procedure is certified (certificate no. 044.10.06.2020/RA.RU.312345).

5. Mercury: per RD 52.04.186-89, "Guidelines for Atmospheric Pollution Monitoring," Part 1: "Atmospheric Pollution in Cities and Other Settlements."

6. Chloroethene (vinyl chloride): per PND F 13.2:3.37-03, "Procedure for the quantitative chemical analysis of ambient air and workplace air for vinyl chloride content by gas chromatography." Developed by the "Regional Center for Environmental Monitoring"; certificate no. 01-200, dated September 21, 2005.

7. Ethylene: per MI 36-GC-2019, "Procedure for measuring the mass concentration of ethylene in ambient air by gas-liquid chromatography." The procedure is certified (certificate no. 030.21.06.2019/RA.RU.312345, dated June 21, 2019; valid until June 10, 2020).

8. Carbon monoxide: per RD 52.04.186-89, "Guidelines for Atmospheric Pollution Monitoring," using an electrochemical method with a "Palladium" gas analyzer.

9. Ammonia: in accordance with RD 52.04.186-89 "Guideline on Atmospheric Pollution Monitoring," using a photometric method.

10. Nitrogen dioxide: in accordance with RD 52.04.792-2014 "Mass concentration of nitrogen oxide and nitrogen dioxide in atmospheric air samples. Measurement procedure using a photometric method with sulfanilic acid and α-naphthylamine." The procedure is certified (certificate No. 18.11.792/01.00305-2011/2014, dated June 25, 2014).

11.Hydrogen sulfide: in accordance with RD 52.04.795-2014 "Mass concentration of hydrogen sulfide in atmospheric air samples. Measurement procedure using a photometric method based on the formation of methylene blue." The procedure is certified (certificate No. 18.16.795/01.00305-2011/2014, dated June 25, 2014).

 12.Sulfur dioxide: in accordance with RD 52.04.822-2015 "Mass concentration of sulfur dioxide in atmospheric air samples. Measurement procedure using a photometric method with tetrachloromercurate and pararosaniline." The procedure is certified (certificate No. 18.08.882/01.00305-2011/2015, dated January 22, 2016).

Suspended matter, in accordance with RD 52.04.893-2020, "Mass concentration of suspended matter in atmospheric air samples: Gravimetric measurement procedure." The procedure is certified (certificate no. 103-195/RA.RU.311787-2016/2018, dated June 19, 2018).