ENVIRONMENTAL AWARENESS & PRESERVAT ION 06 Sect ion 46 Ranhi ll Ut i l i t i es Berhad While Scope one emissions have decreased on the back of continuous efforts to reduce fuel consumption, Scope 2 emissions have increased by 16.6% year-on-year due to the high consumption of electricity to power WTP operations in particular. Scope 3 emissions have been provided as per the aspects mentioned in the Ranhill SAJ carbon footprint analysis. Overall, Scope 3 emissions have increased by 13.41% year-on-year due to increased consumption of goods and services from suppliers with the return to full business operations. RPI and RPII have recorded Nitrogen Dioxide and Carbon Monoxide emissions levels within the permissible limits set by the DOE, which are emissions not exceeding 150mg/m³ for Nitrogen Dioxide and 100mg/m³ for Carbon Monoxide. Emissions levels are monitored by DOE via the Continuous Emissions Monitoring System (CEMS). Both plants, as much as possible prioritise operating in Combined Cycle Operating Mode to minimise carbon and other emissions. Effective maintenance is performed regularly to optimise Gas Turbine (“GT”) performance and efficiency. Higher efficiency and lower heat rate contribute to lower emissions. RPI AND RPII AIR EMISSIONS Air Emissions Data FY2020 FY2021 FY2022 NOx emissions (excluding N2O) (mg/m³) RPI HRSG 11: 48.24 mg/m³ HRSG 12: 52.0 mg/m³ HRSG 21: 77.77 mg/m³ HRSG 22: 85.49 mg/m³ RPII HRSG1A = 8.93 mg/m³ HRSG1B = 11.40 mg/m³ RPI HRSG 11: 49.77 mg/m³ HRSG 12: 40.30 mg/m³ HRSG 21: 46.03 mg/m³ HRSG 22: 40.06 mg/m³ RPII HRSG1A = 8.29 mg/m³ HRSG1B = 7.06 mg/m³ RPI HRSG 11: 21.01 mg/m³ HRSG 12: 21.77 mg/m³ HRSG 21: 17.40 mg/m³ HRSG 22: 19.61 mg/m³ RPII HRSG1A = 25.15 mg/m³ HRSG1B = 11.40 mg/m³ Other standard categories of air emissions identified In relevant regulations – CO (mg/m³) RPI HRSG 11: 62.6 mg/m³ HRSG 12: 56.02 mg/m³ HRSG 21: 69.99 mg/m³ HRSG 22: 73.25 mg/m³ RPII HRSG1A = 8.93 HRSG1B = 11.40 RPI HRSG 11: 55.6 mg/m³ HRSG12: 47.4 mg/m³ HRSG 21: 41.6 mg/m³ HRSG 22: 40.0 mg/m³ RPII HRSG1A = 0.57 HRSG1B = 0.86 RPI HRSG 11: 12.6 mg/m³ HRSG 12: 10.0 mg/m³ HRSG 21: 9.4 mg/m³ HRSG 22: 7.05 mg/m³ RPII HRSG1A = 17.98 HRSG1B = 21.53 Greenhouse gas (GHG) emissions associated with power deliveries (tCO2eq) (%) RPI HRSG 11: 3.48% HRSG 12: 3.25% HRSG 21: 3.23% HRSG 22: 3.18% RPII HRSG1A = 3.48% HRSG1B = 3.26% RPI HRSG 11: 8.06% HRSG 12: 6.66% HRSG 21: 3.52% HRSG 22: 7.02% RPII HRSG1A = 3.55% HRSG1B = 4.58% RPI HRSG 11: 2.70% HRSG 12: 2.60% HRSG 21: 2.70% HRSG 22: 3.20% RPII HRSG1A = 1.17% HRSG1B = 1.20% Note: Station’s emission limit complied with Third Schedule, part A(2), Environmental Quality (Clean Air) Regulations 2014 (first enforced in June 2019), based on emission sources and O2 references corrected at 15%. Measurement of results is based on SOPs set by the DOE of Sabah and is conducted by an independent third party environmental consultant. Results can also be influenced by the following: • Quality of gas supplied to the gas turbine during the measurement period. • Load demand during sampling. • Operational conditions of the gas turbine i.e. temperature, efficiency and other ambient factors. NOx EMISSIONS CO2 EMISSIONS • Data for FY2020 is presented in mg/m³ compared to previous years, which uses g / m³. Hence, the disparity in figures. • NOx readings for RPI are higher as the power plant does not have a dry low NOx (“DLN”) system for its turbines. Effective 2017, a differing parameter was used to measure and assess CO2 emissions. Sampling is performed on different Gas Turbine loads as per requests from the offtaker, SESB. ENV I RONMENTAL Awareness & PRESERVAT ION
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