113 SECTION 4 SUSTAINABILITY JOURNEY INTEGRATED ANNUAL REPORT 2025 Effluent and Air Emissions Management We manage our liquid effluents and air emissions to ensure they do not harm the surrounding environment. We have implemented control measures at our operational sites to treat effluents before discharge and to manage air emissions from our activities, ensuring they comply with the permissible limits set by the Department of Environment (“DOE”) and other relevant authorities. Boundary Noise Monitoring To ensure our operations do not negatively impact our surrounding communities, we conduct regular boundary noise monitoring at our key facilities. In adherence to the EQA, the Group conducts boundary noise monitoring at multiple points along the perimeter of our operations, in line with the approval conditions outlined in Environmental Impact Assessments (“EIAs”). In 2025, the average noise level remained within the permissible limit of 75 decibels (dBA), as stipulated by the DOE’s Noise Limits and Control, Third Edition, 2019. Pollution Prevention and Control Wasco is committed to addressing pollution by taking the following measures to reduce and avoid pollution impacts. They include: • Identifying resources and the generation of all types of waste; • Avoiding their impact and improving efficiency; • Reducing or eliminating pollution at its source; and • Modifying production, maintenance, and facility processes through material substitution, conservation, recycling, and reuse wherever applicable. OUR APPROACH TO A CIRCULAR ECONOMY Beyond traditional waste management, we are actively exploring the principles of a circular economy. Our longterm ambition is to shift our perspective from viewing waste as a liability to seeing it as a potential resource. We are committed to identifying and assessing opportunities to design out waste, extend the life of materials, and create closed-loop systems for our key operational by-products. This represents a strategic focus area for innovation and our long-term environmental footprint reduction. Waste Amine • An authorised contractor collects amine waste using suitable containers for safe transport and disposal. • The client is responsible for providing a designated, bunded storage area for waste containers pending collection. Soil/Spoil • A civil contractor removes soil and spoils from operational sites, transporting them for disposal at an authorised facility. Waste Concrete • A civil contractor removes waste concrete from operational sites, transporting them for disposal at an authorised facility. Contaminate Soil • Contaminated soil, when identified, is removed and stockpiled for disposal at a suitably licensed facility. SUSTAINABILITY JOURNEY
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