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Waste Management

Challenges and Commitments

GGC strives to reduce waste quantity and efficiently manage both hazardous and non-hazardous waste in the production process to minimize environmental and social impacts, while also reducing waste management costs.

Key Stakeholders

Employee
Community
Shareholder, Investor and Analyst
Government
Supplier and Business Partner
Customer

For additional information on stakeholder engagement: Stakeholder Engagement

Goals

Maintain effective management of hazardous and non-hazardous waste from production, with zero landfill disposal.
Achieve more than 50% reuse of Insulation & Jacket Cladding dismantled during maintenance shutdown activities.

Key Performance in 2025

Hazardous and non-hazardous waste from production sent to landfill: 0
Reduce the quantity of Insulation & Jacket Cladding requiring disposal during maintenance shutdowns by more than 50%.
Reduce total waste disposal volume by 20% from 2024, and lower waste management expenses by more than 5 million baht.
Reduce Scope 3 greenhouse gas emissions by more than 9,000 tons CO2e

Management Approach

Waste Management Guidelines
GRI 306-1 (2020), GRI 306-2 (2020)

GGC is committed to maximizing the treatment of hazardous and non-hazardous waste generated from production processes, maintenance activities and other organizational operations. This approach ensures optimal resource utilization throughout the value chain and minimizes overall waste generation. GGC also aims to prevent and reduce potential impacts on surrounding communities and the environment at all stages from upstream waste sources to waste arising across the entire production process.

GGC implements a Waste Management Process aligned with the Circular Economy principles and the 5Rs, comprising Reduce (minimizing waste), Reuse (reusing materials), Recycle (reprocessing materials), Refuse (eliminating the use of environmentally harmful substances), and Renewable (using renewable resources). This is carried out in parallel with maintaining a zero-landfill target on a continuous basis.

Waste Management Process
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5Rs Environmental Culture

Reduce
Maximize resource efficiency in production and minimize resource consumption.
Reuse
Reuse waste to reduce overall waste generation without affecting production processes.
Recycle
Reprocess waste to increase its value and enable reuse, thereby reducing waste volume and decreasing the need for raw material imports.
Refuse
Eliminate the use of substances or processes that are harmful to the environment.
Renewable
Select renewable resources to reduce the use of non-renewable materials.

GGC has also established operational plans to control, inspect and monitor waste management at all plants on a regular basis. This includes the collection, storage and transportation of waste generated from GGC’s activities to certified treatment and disposal facilities, in accordance with the Ministry of Industry Announcement on the Disposal of Waste or Unused Materials. In addition, GGC monitors and reports waste data through the Electronic Waste Manifest System (E-manifest) for every transaction.

Waste Management Programs

GGC manages waste to reduce overall waste generation by maximizing resource efficiency and supporting the continuous achievement of the zero-landfill target. GGC regularly conducts Waste Audits to identify waste generation points, waste types and waste quantities, determine sources, and analyze waste-generation processes. These findings help identify opportunities to improve production operations and waste management practices, with an emphasis on sustainable environmental stewardship.

GGC has developed a waste management action plan for plant shutdown periods to ensure effective waste reduction and management. The plan is based on the 5Rs environmental principles and incorporates waste management strategies as follows:

1. Production Waste Reduction

GGC improves production processes to minimize waste generation at the source and promotes the reuse of waste materials. The Company also prepares designated areas and containers for proper storage and efficient waste segregation. For example, insulation removed from equipment is carefully sorted and stored to enable future reuse. This approach helps reduce the volume of waste requiring disposal and enhances sustainable resource management.

2. Enhancing Waste Value through Reuse

GGC collaborates with waste management partners to utilize non-hazardous waste as raw material in biogas production. This initiative not only reduces the amount of waste requiring incineration but also promotes environmentally friendly alternative energy. It increases resource efficiency and supports the sustainable development of renewable energy.

3. Equipment and Machinery Maintenance

GGC evaluates and improves the selection of materials and equipment used in production lines to ensure suitability for operation. This helps extend equipment lifespan, reduce deterioration risks and lower the likelihood of unexpected shutdowns. The Company also implements systematic cleaning schedules during maintenance shutdowns to prevent waste accumulation, enhance operational efficiency and support sustainable production.

4. Chemical Use Improvement

GGC studies and tests alternative cleaning chemicals that are safer and more environmentally friendly for equipment cleaning processes. The Company has also established practices and procurement requirements aligned with its policy to reduce hazardous chemical use, thereby promoting safer operations and minimizing environmental impacts.

For additional information on waste management performance: GGC Performance Data 2025

Zero Waste to Landfill

Since 2014, GGC has achieved zero landfill disposal from all plants. GGC obtains approval for transporting waste or unused materials outside plant premises through the electronic system of the Department of Industrial Works, using only licensed disposal methods and authorized waste operators. GGC also reports annual waste data from both plants to the Department of Industrial Works according to the reporting cycle and undergoes verification by external organizations for relevant certifications.

In addition, GGC continuously explores alternative waste management methods to identify opportunities to improve waste-generation processes and maximize the recovery and reuse of unused materials.

Waste Training

GGC places high importance on effective waste management to reduce overall waste generation, enhance resource efficiency and support the continuous achievement of the zero-landfill target. As such, building employee capability is essential. GGC provides training programs related to waste management, and in 2025 the Company conducted the following waste management training:

ISO 14001 Based Training

GGC conducts annual waste management training for employees using the ISO 14001 standard to enhance understanding and awareness, enabling employees to apply the knowledge in practice and support national waste management goals. The training curriculum includes the following topics:

  1. Basic knowledge of waste and waste management
  2. Waste awareness
  3. Safety commitment for contractors
  4. Improving resource efficiency for appropriate utilization
  5. Enhancing process efficiency and reducing production waste
  6. Management of non-hazardous and hazardous waste

Outcomes and Benefits

  • A total of 168 employees participated.
  • Participants demonstrated improved knowledge of waste management in accordance with ISO 14001.
  • The training assessment results achieved 100% completion by operational excellence employees.

Employee Training Program for Plant Shutdown Preparation

GC conducted training sessions for employees and contractors working at both plants to ensure readiness for the Plant Shutdown period, during which machinery and equipment maintenance and cleaning activities take place to enhance production efficiency. The training covered waste management practices specific to plant shutdown operations, including:

  • Managing environmental impacts
  • Improving water resource and energy efficiency, including reducing operational waste
  • Occupational health and safety to minimize potential incidents or losses

In 2025, GGC conducted a total of five training sessions.

Outcomes and Benefits

  • More than 200 employees and contractors participated
  • Participants demonstrated improved knowledge of waste management
  • Resource and waste management planning became more systematic

Waste Management Project

GGC continues to maintain its zero-landfill standard and has implemented additional waste management initiatives to minimize environmental impacts. In 2025, GGC carried out the following project:

Waste to Biogas

GGC collaborated with capable partners equipped with ready-to-use technology to study and pilot the conversion of waste and wastewater generated from production processes—including Glycerin Residue Sludge, Glycerin Residue (Salt), Scum Oil from wastewater treatment, Wastewater Sludge, Spent Bleaching Clay, and Sweet Water—into biogas. The resulting biogas is then used as fuel to generate heat and steam for GGC’s plants. This initiative reduces the volume of imported fuel oil, increases opportunities to expand the use of renewable energy, enhances waste valorization through recycling and reduces waste requiring incineration.

Outcomes and Benefits

  • In 2025, GGC reduced waste requiring incineration by more than 5,500 tons, equivalent to 9,000 tons CO2e
  • Reduced waste disposal expenses by more than 7 million baht
  • Reduced fuel procurement costs by more than 14 million baht, and decreased fuel consumption by over 6 million liters

For additional information on project: https://www.ggcplc.com/th/sustainability/environment/climate-strategy

InsuCycle: Smart Reuse for Shutdown

GGC applies the Reuse principle by sorting usable insulation materials. During machinery and equipment inspection or repair, insulation must be removed; it is then categorized based on its condition and quality at the source. Insulation suitable for reuse is stored at the Insulation House and prepared for future application using the correct installation procedures. This initiative reduces the volume of waste requiring disposal and lowers the cost of purchasing new insulation materials.

GGC has also established procedures covering data collection, result recording, calculation and analysis to improve insulation management and future insulation procurement.

Process: Insulation Removal Data Collection

Process: Reinstallation Data Collection for Reused Insulation

Outcomes and Benefits

  • More than 50% of insulation materials were reused
  • Insulation requiring incineration decreased by 67% compared with 2024, reducing disposal costs by more than 17,000 baht.
  • Reduced new insulation procurement costs by more than 580,000 baht.