IRPC One Report 2022 EN

• Thailand Voluntary Emission Reduction Program: T-VER IRPC’s 12.5 MW Floating Solar Power Plant project at solar power plant project Floating Solar Power (Floating Solar Power) at its reservoir was awarded a plaque of recognition and certificate for Thailand Voluntary Emission Reduction (T-VER) by Thailand Greenhouse Gas Management Organization (Public Organization) following the project’s registration as a T-VER project, which is expected to reduce greenhouse gas emissions by an average of 9,459 tons of carbon dioxide equivalent per year (tCO2eq/y) during the carbon credit calculation period of 7 years from January 1, 2021 to December 31, 2027. T-VER Thailand Voluntary Emission Reduction Program 2021 2022 2023 Project T-VER (Floating Solar Power) T-VER (Floating Solar Powerr: Monitoring)) PP, PS (cont.), ABS, SAN WAY • Support government for develop Eco-industrial town • As a consequence of the global warming problem that has resulted from excessive greenhouse gases (GHG) emissions Greenhouse gas emissions by an average of 9,459 tCO2eq/year • Internal Carbon Pricing In 2021, IRPC adopted the concept of internal carbon pricing (ICP), or shadow price, in evaluation and decisionmaking on green projects and investments, alongside other financial tools, such as internal rate of return (IRR). IRPC set an ICP US$20/tCO2eq in accordance with the guidelines on the determination of carbon pricing and low carbon investment as recommended by Thailand Greenhouse Gas Management Organization (TGO) in collaboration with World Bank. Such green investments include the Floating Solar Phase II 9.0 MW for PP Plant, VDU Heater Energy Efficiency Improvement for Lube Plant. • Assessing risks, impacts, and opportunities according to the Task Force on Climate Guidelines-related Financial Disclosures (TCFD) IRPC fully recognizes the risks associated with climate change as a major threat to sustainable development that may impact the company’s business operations. These include physical risks from natural disasters and transition risks arising from the rapid changes in policies, regulations, and technologies. The company has adopted the Task Force on Climate-Related Financial Disclosures (TCFD) in four key areas: Governance, Strategy, Risk Management, and Metrics and Targets as guidelines for assessing risks, impacts, and opportunities to align with our business operations in 2023. 167 Business-Driven Sustainability IRPC PUBLIC COMPANY LIMITED

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