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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 releasing it into public waters.
Water consumption increased 55 thousand tons from 2015. This was due to increase in production. In terms of water quality, total BOD in wastewater increased 1,341 kg from 2015, while nitrogen decreased 855 kg and phosphorus decreased 83 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. While NOx emissions increased 4 tons from 2015, but are trending downward overall because of declining use of Bunker A fuel oil and city gas. 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.

<Ukima plant>
A soil survey was conducted in association with the dismantling of a drug manufacturing facility. 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 will continue monitoring the groundwater to verify that it is no longer polluted. We plan to continue monitoring up to the end of 2017. No issues have arisen as of the end of 2016.

<Kamakura laboratory>
In association with the dismantling of a drug research facility, a soil survey was conducted in accordance with regulations. As a result, fluorine and selenium were detected in some soil at levels above standards, and after submitting a report to the authorities based on Kanagawa Prefecture’s Ordinance for the Protection of Living Environments, we excavated and removed all of the soil exceeding those standards. This work was completed in August 2016.

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