practices, we have implemented the rainwater harvesting system at TNB Sepang Solar and TNB Bukit Selambau Solar, which currently hold capacities of 24,000 litres and 1,000 litres respectively. Boiler combustion tuning for our coal-fired boilers and gas turbine tuning to optimise water circulation ratio and feed water consumption when consuming fuel of diverse quality 1 Continuous upgrade of high-pressure valve materials to sustain continuous operation at zero leak and passing conditions 2 Pre-emptive thermography and thermal scanning before planned outages to correctly identify and replace leaking valves 4 Periodical inspection of condensers using both online and offline methods to identify and reduce condenser tube leak incidents 3 Improving feed water heaters and economiser temperatures by reducing spray water cooling upstream of the condenser neck 5 We are committed toeffectively managing waste to reduce the adverse effects on human health and the environment. Hazardous and non-hazardous waste are two (2) primary types of waste generated in TNB, each demanding distinct handling and disposal strategies. Hazardous Waste Our hazardous waste handling and disposal process is regulated by the Department of Environment (DOE) and governed by the Environmental Quality Act 1974. Our Scheduled Waste Roadmap 2018-2030 aims to strengthen hazardous waste management with a phased approach involving all employees and key stakeholders. Waste Management Closed-loopwaterusagefor steamgeneration Waterusagefor powerplantcoolingsystem Water usage in our closed-loop steam generation process is relatively small, 1.87% to 3.08%, minimising our reliance on municipal water sources. Power plants continue to operate efficiently using the closed-loop steam generation processes efficiently to reduce water usage percentage through water treatment measures, blowdown minimisation and leak prevention Our cooling process, facilitated through the open circuit Main Cooling Water system, operates efficiently by utilising seawater or river water