Appendices

PJSC Gazprom, the Company — the parent company of the Gazprom Group — Public Joint-Stock Company Gazprom — and its 100% subsidiaries and entities involved in exploration, production, transportation, underground storage, processing of hydrocarbons, as well as operation of the Unified Gas Supply System (UGSS).

The Gazprom Group, Gazprom or the Group mean PJSC Gazprom and the following companies: Gazprom Neft Group, Gazprom Energoholding, Gazprom Neftekhim Salavat, Vostokgazprom Group (JSC Gazprom Dobycha Tomsk), Gazprom Mezhregiongaz Group, JSC Daltransgaz, Sakhalin Energy LLC, OJSC Severneftegazprom, CJSC Purgaz.

The Group’s gas business companies include PJSC Gazprom (100 % of its subsidiaries and entities involved in production, transportation, underground storage and refining of hydrocarbons, as well as operation of the UGSS): Gazprom Mezhregiongaz, Vostokgazprom Group (JSC Gazprom Dobycha Tomsk), JSC Daltransgaz, Sakhalin Energy LLC, OJSC Severneftegazprom, CJSC Purgaz.

Gazprom Neft Group and Gazprom Neft mean PJSC Gazprom Neft and its subsidiaries.

Gazprom Neftekhim Salavat means Gazprom Neftekhim Salavat LLC and its subsidiaries.

Gazprom Energoholding means Gazprom Energoholding LLC and its subsidiaries (PJSC Mosenergo, PJSC MOEK, PJSC OGK-2, PJSC TGC-1).

Gazprom Mezhregiongaz Group, or Gazprom Mezhregiongaz, means Gazprom Mezhregiongaz LLC and its subsidiaries.

The environmental impact, ecological and economic indicators are shown for the Gazprom Group’s operations in Russia.

The following standards were used to calculate the fuel and energy savings:

1. STO Gazprom 3.3-2-044-2016 Standards and Targets of Resource Consumption, Equipment Usage and Inventory Development at PJSC Gazprom. Methodology of Setting Natural Gas Consumption Limits for Internal Process Needs and Technological Losses during Trunkline Gas Transportation;
2. STO Gazprom 2-1.20-601-2011 Methodology of Estimating the Effect of Fuel and Energy Savings from Internal Process Needs of the Gas Trunkline Transportation;
3. STO Gazprom 2-1.9-191-2008 Methodology of Estimating the Heat Consumption Limits for the Internal Process Needs of OJSC Gazprom’s Gas Transportation Businesses;
4. STO Gazprom 2-3.5-113-2007 Methodology for Assessing Energy Efficiency of Gas Transportation Facilities and Systems;
5. STO Gazprom 3.3-2-001-2006 Methodology of Setting Power Consumption Limits for Internal Process Needs of Gas Transportation;
6. STO Gazprom 3.0-2006 Standards and Targets of Resource Consumption, Equipment Usage and Inventory Development at OJSC Gazprom. Main Provisions;
7. STO Gazprom RD 1.19-126-2004 Methodology of Estimating Unit Gas Consumption Standards for Heat Generation and Calculation of Losses in Heating Systems (Boiler Stations and Heat Supply Networks);
8. R Gazprom 2-1.20-819-2014 Methodology of Estimating the Amount of Fuel and Energy Savings from Implementation of Energy Saving Initiatives at the Subsidiaries;
9. R Gazprom 2-1.20-742-2013 Methodology of Defining the Energy Saving Potential of Process Facilities.

The decline in waste generation is due to a reduction in bottom ash waste resulting from the growing share of natural gas in the fuel mix.

At the Gazprom Group, most of the waste is Gazprom Neft’s drilling waste, Gazprom Energoholding’s bottom ash waste (solid coal combustion products generated by TPPs), as well as oil sludge mainly generated by oil and gas production and processing facilities.

The decline in the Gazprom Group’s waste generation ensues from a reduction in Gazprom Energoholding’s bottom ash waste by 64% due to the growing share of natural gas in the fuel mix.