Prevention of Air, Water and Soil Pollution

Water Pollution Prevention and Associated Measures

Based on the Water Pollution Control Act and various prefectural ordinances, the Chugai Group treats its wastewater at wastewater treatment plants, verifying compliance with wastewater standards before dischaging it into public waters.

Water consumption increased 142 thousand tons from 2016 to 1.73 million tons. This was due to increase in production. Wastewater is 1.601 million tons, and in terms of water quality, total BOD in wastewater increased 171 kg from 2016, while nitrogen increased 1,156 kg and phosphorus increased 82 kg. Note that these wastewater quality indicators were well within the prescribed wastewater quality standards (BOD: 160 mg/L, Nitrogen: 120 mg/L, Phosphorus: 16 mg/L) at all plants and laboratories.

Water Consumed and Wastewater

Graph: Water Consumed and Wastewater

Total BOD, Nitrogen and Phosphorus

Graph: Total BOD, Nitrogen and Phosphorus

Air Pollution Prevention and Associated Measures

Based on the Air Pollution Control Act and various prefectural ordinances, the Chugai Group measures emissions of nitrogen oxides (NOx), sulfur oxides (SOx) and particulates, verifying compliance with emissions standards before releasing them.

Figures for air pollutants emitted at each site are trending significantly below prescribed environmental limits. NOx emissions increased 9 tons from 2016. Since the second half of 2014, Chugai has been promoting the conversion of the main fuel in heat source equipment to city gas from Bunker A fuel oil. This was reflected in a significant decrease in SOx emissions. Ash and dust emissions also decreased for the same reason.

NOx emissions

Graph: NOx Emissions

SOx and Dust Emissions

Graph: SOx and Dust Emissions

Soil Pollution Prevention and Associated Measures

Based on the Soil Pollution Control Act and various prefectural ordinances, the Chugai Group conducts appropriate soil surveys in compliance with the law.
In the event that soil pollution were to be found, we would discuss the issue with the authorities, and take appropriate steps to contain it and clean it up.

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A soil survey was conducted in association with the dismantling of a drug manufacturing facility in 2014. As a result, fluorine, arsenic and lead were detected in some soil and groundwater at levels above standards, and after submitting a report to the authorities based on the Soil Pollution Control Act, we excavated and removed all of the polluted soil exceeding those standards.
While the removal of the polluted soil also eliminated the cause of the groundwater pollution, in accordance with the law we have monitored the groundwater and verified that it is no longer polluted. As a result of monitoring conducted through the end of 2017, we verified that all pollution-causing substances were at levels below standards, thus completing the soil remediation.
Under the guidance of the authorities, we also took steps to prevent scattering of soil containing lead in excess of standards, found in a soil survey conducted in 2003. In constructing the new building, we reported to the authorities based on the Soil Pollution Control act, and the excavation and removal of the soil in question was completed in July 2018.

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Environmental Protection, Safety and Health

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