มลพิษและทรัพยากร
Pollution & Resources

The Company recognizes air quality management as a critical aspect of environmental performance, particularly for emissions from production processes and supporting activities. The Company systematically identifies and analyzes sources of air pollutants to determine root causes and implement appropriate controls, ensuring emissions are treated before release. Key pollutants, including dust, NOx, SOx, and CO, are continuously monitored and managed through established control systems, while new technologies and innovations are evaluated and adopted to further improve emission control and air quality performance.

The Company also manages risks associated with inadequate air emission controls and non-compliance with regulatory requirements, which could result in environmental impacts and legal consequences. Effective monitoring, compliance management, and continuous improvement are therefore emphasized to ensure safe, compliant, and environmentally responsible operations.

Management Approach

Air Pollution Management

The Company systematically manages air emissions by identifying emission sources from production and supporting activities, analyzing root causes, and implementing appropriate controls to minimize environmental impacts. Key pollutants, including NOx, SOx, CO, and particulate matter, are treated and controlled before release to ensure compliance with applicable regulatory requirements.

To strengthen monitoring and compliance, the Company has installed Continuous Emission Monitoring Systems (CEMS) across all three plants, with real-time data integrated into the Pollution Online Monitoring System (POMS) of the Department of Industrial Works. This enables continuous monitoring, timely response to deviations, and enhanced air quality management. The Company also evaluates and adopts new technologies to further improve emission control efficiency and environmental performance.

Dust Management

The Company implements targeted dust management measures across operational activities, including raw material handling, transportation, production processes,
and storage, to minimize environmental impact and prevent potential effects on surrounding communities. Dust generated from high-temperature production
processes is treated through a combination of cyclone systems and bag filters to reduce Total Suspended Particulates (TSP) to levels below regulatory limits, with
collected dust selectively recycled for reuse as raw material.

For dust from storage and outdoor areas, preventive measures such as water spraying, material covering, wind direction control, and the establishment of green
buffer zones are applied. In addition, the Company promotes employee awareness and participation through regular communication and initiatives on
proper handling practices and energy efficiency, further strengthening environmental performance and operational responsibility.

FY2027 Action Plan

In FY2027, the Company will prioritize compliance with the new Notification of the National Environment Board on General Atmospheric Air Quality Standards
(B.E. 2569) as a key focus area. The Company plans to strengthen its air emission management practices through the enhancement of monitoring systems, including
the optimization of Continuous Emission Monitoring Systems (CEMS), and improvement of data accuracy and reporting processes to ensure alignment with the
updated regulatory requirements.

In addition, operational controls and maintenance programs will be reviewed and upgraded to support emission reduction and prevent potential noncompliance. Capacity building and awareness programs will also be conducted for relevant employees to reinforce understanding of the new regulation and ensure effective implementation. These initiatives aim to enhance regulatory compliance, reduce environmental impacts, and support the Company’s commitment to
sustainable environmental performance.

Targets and Goals

Highlighted Implementation and Activities

Continuous Emission Monitoring System (CEMS)

The Company has strengthened its air emission management through the implementation of Continuous Emission Monitoring Systems (CEMS) across three plants, with real-time data integrated into the Pollution Online Monitoring System (POMS) of the Department of Industrial Works (DIW). This system enables continuous monitoring of key emission parameters, including dust, NOx, SOx, and CO, supporting timely identification of deviations and effective regulatory compliance.

As part of continuous improvement efforts, the Company has enhanced real-time monitoring practices and preventive maintenance of air pollution control equipment, particularly baghouse systems, to ensure stable emission control performance. These improvements were implemented to prevent emission exceedances and enhance overall environmental performance.

360° CCTV Monitoring for Safety and Environmental Control

The Company enhanced its safety and environmental monitoring capabilities by installing 360-degree CCTV systems at SCSC to enable real-time observation of operational areas. The system is designed to support proactive monitoring of potential safety risks and environmental conditions, including dust and smoke emissions, allowing for early detection and timely response to abnormal situations before they impact surrounding communities. This initiative
helps strengthen operational control, improve site visibility, and reduce the risk of incidents related to workplace safety and air quality. The implementation also supports continuous improvement in environmental performance and reinforces the Company’s commitment to safe and responsible operations.

The effectiveness of these monitoring and control measures is reflected in ambient air quality performance across operational sites and surrounding communities. As shown in the table below, the Company continuously monitors Total Suspended Particles (TSP) concentrations at key locations, with results consistently maintained well below the regulatory standard of 0.330 mg/m³. Overall performance indicates effective control of particulate emissions, with most monitoring points showing improved or stable trends during the reporting period, reinforcing the Company’s capability to manage air quality impacts in surrounding areas.

FY 2026 Performance

Waste Management

The Company recognizes waste management as a critical component of environmental stewardship and regulatory compliance. All unused materials and industrial waste are managed in accordance with the Company’s Environmental Policy and applicable laws and regulations. Waste handling, transportation, and disposal are strictly controlled through a permitting process with the Department of Industrial Works, ensuring treatment and disposal are conducted according to specified waste types and approved methods.

The Company also provides regular training to enhance employees’ awareness and capabilities in pollution prevention, waste management, and proper disposal practices. Potential risks, including improper handling, spillage during transportation, and regulatory non-compliance, are managed through robust controls, monitoring, and continuous improvement to ensure safe, compliant, and responsible waste management across operations.

Management Approach

The Company manages waste and unused materials in accordance with its Environmental Policy and applicable environmental laws and regulations. All industrial waste is handled under strict regulatory requirements, including approval from the Department of Industrial Works for transportation, treatment, and disposal outside the Company’s facilities. Waste is disposed of only through licensed operators according to specified waste classifications and approved disposal methods, ensuring safe and compliant waste management while enhancing employee awareness and capability.

The Company promotes resource efficiency and circular practices by maximizing waste utilization, with a target of approximately 99%, to minimize landfill disposal, reduce environmental impacts, and support efficient resource use in line with sustainable development objectives.

In FY 2027, the Company plans to explore reducing landfill waste by collaborating with external vendors to assess the feasibility of recycling refractory materials through technical studies, suitable recycling technologies, and pilot projects for potential reuse applications. The Company will also strengthen waste segregation and compliance controls throughout the waste management process. Performance will be monitored through key indicators, including landfill waste reduction and recycling rates, to identify opportunities for scaling up and improving resource efficiency.

Targets and Goals

Highlighted Implementation and Activities

Waste Management Process

The Company has a waste management approach focusing on systematic segregation, controlled storage, and proper disposal of different waste streams to ensure safe, compliant, and environmentally responsible operations.

Radioactive Material Management

The Company has implemented radiation detection systems to prevent the use of contaminated scrap materials in the production process, thereby safeguarding product safety and protecting end-users. Screening is conducted at the earliest stage of raw material handling, with all scrap deliveries being inspected upon entry into the plant and prior to material acceptance.

Waste Awareness Training and communication to employees

The Company promotes effective waste management through continuous awareness and training initiatives across its operations. Waste awareness sessions conducted at SISCO enhanced employees’ understanding of proper waste segregation and disposal practices, including classification into general, recyclable, and hazardous waste. These efforts are supported by visual communication tools, on-site demonstrations, and clear signage across operational areas to reinforce correct practices. Through strengthened employee awareness and engagement, the Company improves compliance, enhances waste utilization efficiency, and supports its commitment to sustainable resource management.

Improvement for Waste Storage Area

The Company is undertaking an initiative to improve the efficiency and safety of its waste storage area by enhancing layout design, segregation practices, and storage control systems. The project aims to reduce the risk of improper waste handling, improve operational efficiency, and support compliance with environmental regulations. Key improvements include the reorganization of storage zones, implementation of clear signage and labeling systems, and strengthening of waste inventory tracking and monitoring processes. As a result, the Company expects to improve waste handling efficiency, minimize potential environmental risks, and enhance overall site management performance. The project is being implemented for EAF Dust and Mill Scale storage area at NTS, SCSC, SISCO, with expected outcomes including prevent rain and spillage to contaminate with soil

Tata Steel World Environment Day

The Company celebrated World Environment Day on 6 June across its operational locations in alignment with Tata Steel Group initiatives. The activities included tree plantation campaigns, environmental awareness initiatives, sustainability workshops, and community engagement programs aimed at promoting environmental responsibility.

In addition, the Company emphasized reducing plastic waste across its operations by promoting the principles of reduce, reuse, and rethink. These initiatives reflect the Company’s commitment to translating environmental awareness into tangible actions and fostering a culture of sustainability among employees and surrounding communities.

SCSC and NTS Open House under the Green Star Project

SCSC and NTS participated in the Green Star Award program organized by the Industrial Estate Authority of Thailand (IEAT), which evaluates environmental and
operational performance across four key dimensions: physical, environmental, social, and management aspects. These include green area management, waste
and air quality control, community engagement, and plant safety and emergency preparedness.

As part of this initiative, both plants organized Open House activities, inviting local communities to visit the facilities. The program was designed to enhance
transparency in environmental management, build trust with stakeholders, and demonstrate the Company’s commitment to responsible operations and sustainable
development.

Waste Exchange to value campaign

The Company implemented the “Waste Exchange to Value” campaign to promote waste reduction and resource reuse through employee engagement and
circular economy practices. The initiative encourages employees to segregate and exchange recyclable waste items for practical goods, thereby increasing awareness of proper waste management and creating value from waste materials. Activities included on-site collection points, awareness campaigns, and participation across various functions at SCSC. As a result, the campaign contributed to improving waste segregation efficiency and recycling rates, while fostering a culture of sustainability and shared responsibility among employees. The initiative supported the reduction of general waste sent to landfill and is aligned with the Company’s broader waste management and resource efficiency objectives.

FY 2026 Performance