Our Approach and SDGs Economy Society Reporting Center Sustainability in Actions Awards and Recognitions
Environmental Management System and Investments Climate Strategy Energy Management Sustainable Water Waste Management Product Stewardship Circular Economy Biodiversity
Emissions Reduction Target and Performance

Emission Reduction Programs

GC has conducted projects to enhance air pollution control efficiency, focusing on controlling emissions of nitrogen oxides (NOx), sulfur oxides (SOx), and volatile organic compounds (VOCs) both within its operating sites and in surrounding areas, in compliance with applicable laws, regulations, and international best practices. In addition, GC represents the petrochemical industry group in collaborating with government agencies to develop air pollution management guidelines. By applying advanced innovations, GC aims to maximize effectiveness through a strong working‑group network dedicated to environmental management.

GC has developed programs to monitor NOx and SOx emissions in order to reduce impact to environment such as

  • Using Continuous Emissions Monitoring System (CEMS) and regularly monitoring air emission quality by the certified external laboratories.
  • Improving Gas Turbines and Low NOx Burners to reduce the NOx pollution emitted from its source.
  • Adopting a policy for selecting raw materials and fuels, which have less impact to health and environment.
  • Using low sulfur fuel oil and feedstock to reduce SOx emissions from combustion.
  • Minimizing amount of fuel oil consumption to limit SOx emissions.

In 2025, highlights projects relating to improvement on control efficiency of air pollution include:

Predictive Emission Monitoring System, PEMs

GC has installed a Continuous Emission Monitoring System (CEMS) in accordance with legal requirements and EIA measures to strictly monitor stack emissions, prevent exceedances of emission standards, and prepare statutory reports. Emission data are also transmitted from the company’s Plant Information System through the Department of Industrial Works’ Pollution Online Monitoring System (POMS) to the Industrial Estate Authority of Thailand’s server for real time online reporting on the Department of Industrial Works’ web page.

In addition, the Department of Industrial Works allows factories to choose predictive emission monitoring (PEMS) as an alternative method for stack emission surveillance if the development and accuracy testing of PEMS comply with US EPA requirements.

In 2025, the company volunteered to be among the first plants in Thailand to join the environmental working group of the petrochemical industry under the Federation of Thai Industries to study practices for monitoring emissions using engineering principles and data science (PEMS).

Pollution Online Monitoring System, POMs

The company has also participated in the development of a remote pollution monitoring and early warning operating system in line with the draft Ministerial Regulation on requiring factories to install special instruments or equipment to report air emissions from stacks (No. 2), B.E. 2567 (2024). The company has cooperated by connecting its POMS application signal to the POMS Box developed by the Department of Industrial Works and the Industrial Estate Authority of Thailand, to facilitate data transfer from industrial operators to the Environmental and Safety Monitoring Center of the Industrial Estate Authority of Thailand. This demonstrates transparency in reporting air emissions from stacks and in disclosing treated wastewater quality indices from industrial plants.

In 2025, the company installed the POMS Box and connected air emission data from stacks measured by the Continuous Emission Monitoring System (CEMS), as well as COD and flow data of treated wastewater from the plant, to the Industrial Estate Authority of Thailand, thereby enhancing transparency in environmental information disclosure to the public.