The company discloses that the volume of effluent by treatment method is measured daily with a voluntarily installed flowmeter at each production site, and the person in charge at each base checks the water discharge quality by standard effluent parameters every day by using automatic evaluation equipment or by manual or third-party evaluation equipment or under the standard on each base. Further, it discloses that wastewater passes through additional facilities (tertially treatment) before discharging at plants where secondary treatment is not enough to meet strict emission standards for wastewater, and for plants that meet water quality standards without removing phosphorus, nitrogen, and heavy metals from wastewater, it carries out secondary treatment. Moreover, it states that in plants that can meet the wastewater standards only through primary treatment, the wastewater is discharged after passing through the primary treatment facility (physical treatment). Additionally, it discloses that its subsidiary in Thailand treats wastewater using separate wastewater treatment facilities according to the COD concentration of the wastewater, and it has installed wastewater treatment facilities at many of its plants, which are maintained at a high level and properly treat plant wastewater before being discharged outside the plant. Also, it discloses that it has received ISO 14001 certification for many of its plant facilities.