Optimising our Heating, Ventilation and Cooling (HVAC) Systems In 2022, we implemented a “smart” building management system to enhance chiller plant performance and efficiency in our Singapore operations. This system collects and analyses system data to optimise operations. The pumps and fans were converted from fixed to variable speed drives, allowing dynamic set points to be controlled by machine learning algorithms. This helped to reduce our emissions by at least 80 tCO2e/year. Similarly, our U.S.-based subsidiary, Miltope, achieved operational energy reductions through seasonal preventative maintenance, reprogramming software and implementing smarter thermostats in their HVAC systems. Upgrading our Infrastructure and Equipment to Reduce Emissions We improve our operational efficiencies by upgrading the infrastructure and equipment at our facilities. This includes initiatives such as replacing switchgears with dry air-insulated models which eliminate the use of sulphur hexafluoride (SF6). We Use Water Efficiently We use water from municipal sources. This is predominantly for building and equipment cooling, cleaning, general sanitation, and operational activities, such as aircraft and vehicle washing. We monitor water usage, impact and management in our operations. In our Singapore operations, we conduct environmental aspect and impact evaluations as part of ISO 14001 Environmental Management Systems. Based on the results of the evaluation, we implement control measures to mitigate our environmental impact such as raising awareness among our employees on the importance of water conservation, and embarking on water recycling and conservation programmes. We strive to reduce the water intensity of our business. In our Singapore operations, we aim to reduce our water usage intensity target by 15% on a business-asusual basis by 2025, with 2015 as the base year. In 2022, our water consumption intensity as a measure of revenue in Singapore was 65m3/$million revenue. This was a decrease of 65% compared to the intensity in our 2015 base year. Supporting the Electrification of Transport Every action counts towards our efforts in reducing our GHG emissions, including electrifying our vehicle fleets. For example, our Mobile and Pensacola operations in the U.S. invested in electric vehicles and charging infrastructure to reduce emissions in the daily journeys between both sites. Additionally, our Urban Solutions business rolled out seven electric vehicle charging stations at our Singapore operations for employees, visitors and our own vehicle fleets, with more charging stations in the pipeline. The accessibility of the charging stations at our operational locations help to support the clean energy transition in our respective communities. ENVIRONMENTAL ENVIRONMENTAL PROTECTION 7 Based on our water consumption in our material Singapore operations WATER CONSUMED7 2020 2021 2022 (‘000m3) 638 717 588 1,000 800 600 400 200 0 40 ST ENGINEERING SUSTAINABILITY REPORT 2022
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