Environment Initiatives to Prevent Pollution and Reduce Environmental Burdens
Curbing Emissions of Air Pollutants
The Mitsubishi Tanabe Pharma Group is curbing emissions of air pollutants. The Group's production and research bases have installed facilities that produce soot and smoke such as boilers, but, except for the three plants to which city gas is not supplied, they use city gas, which emits fewer air pollutants than fuel. In addition, we measure the levels of air pollutants (NOx, SOx, particulate matter) at facilities where smoke analysis is required under laws and regulations, and we confirm that those levels are within legal standard.
Domestic emissions of air pollutants in fiscal 2018 were NOx 12.24 tons (down 28% year on year), SOx 3.17 tons (down 47%), and particulate matter 0.15 tons (down 44%). Each of these indicators also declined year on year. This decline was due to proportionally distributing the emissions of other companies located within the Yoshitomi Plant to each company and excluding them from Yoshitomi Plant emissions. On the other hand, overseas emissions of air pollutants were NOx 2.13 tons (up 20% year on year), SOx 0.35 tons (down 19%), and particulates 0.02 tons (unchanged).
The Group's domestic bases have previously conducted surveys of air-borne asbestos and took anti-scattering measures where applicable. In addition, when we demolish facilities, we check for the presence of asbestos in sprayed materials, heat insulating materials, building materials, and other materials that are removed, and as needed, we take measures to properly manage and prevent scattering.
The Group's domestic bases do not have facilities that generate particulate matter or VOC as legally defined. Regarding VOC emissions into the atmosphere, please refer to the section "Emissions of Chemical Substances into the Environment and Status of PRTR Emission Reduction Target Achievement."
Prevention of Water Pollution
The Group's production and research bases treat harmful substances, physiologically active substances, and others as wastes, thereby limiting their mixture with wastewater as much as possible. Also, we adjust the pH, perform purification, and comply with emission standards prior to wastewater discharge. Especially at the Onoda, Yoshitomi, and Tanabe Indonesia Bandung plants, where wastewater is discharged into public water bodies (rivers, oceans, etc.), wastewater undergoes activated sludge treatment, and we comply with emission standards for public water bodies that are stricter than that for sewage discharge.
The domestic discharge of wastewater in fiscal 2018 was 4,427 thousand m3 (down 12% year on year) for public water bodies and 210 thousand m3 (down 19%) for sewage. Emissions of water pollutants contained in wastewater discharged into public water bodies were BOD 8.40 tons (down 5.1%), COD 10.22 tons (down 71%), nitrogen 5.23 tons (down 76%), and phosphorus 0.33 tons (down 65%). The decreases in COD, nitrogen and phosphorus emissions were due to proportionally distributing the emissions of other companies located within the Yoshitomi Plant to each company and excluding them from Yoshitomi Plant emissions. Since the Yoshitomi Plant has no obligation to measure when directly discharging into the ocean, BOD is the only value used at the Onoda Plant.
On the other hand, overseas wastewater discharge into public water bodies was 2.6 thousand m3 (down 33% year on year) and sewage was 65.3 thousand m3 (up 3.8%). Emissions of water pollutants contained in wastewater discharged into public water bodies were BOD 0.04 tons (down 20% year on year), COD 0.11 tons (down 21%), and nitrogen 0.01 tons (down 63%).
Emissions of Chemical Substances into the Environment and Status of PRTR Emission Reduction Target Achievement
In addition to properly managing PRTR substances and VOCs, the Group is constantly working to reduce emissions into the environment by improving equipment and manufacturing processes.
Domestic air emissions of PRTR substances in fiscal 2018 were 3.2 tons (down 3.0% year on year), and emissions into public water bodies were 0.5 tons (down 19%). In addition, air emissions of VOCs were 32 tons (down 9.3%), and emissions into public water bodies were 14 tons (up 7.7%).
On the other hand, overseas emissions of PRTR substances were 0.0 tons (unchanged year on year), emissions into public water bodies were 0.0 tons (unchanged), and air emissions of VOCs were 7.5 tons (up 121%), and emissions into public water bodies were 7.9 tons (unchanged).
The Medium-Term Environmental Action Plan aims to reduce toluene emissions by at least 30% by fiscal 2020 compared to fiscal 2010 levels. The toluene emissions in fiscal 2018, which were 2.5 tons for air and public water bodies combined, were down 32% compared to fiscal 2010, thus maintaining the target achievement level. As in the previous fiscal year, emissions at the Yoshitomi Plant have been calculated using values apportioned to other companies within the plant premises.
Prevention of Soil and Ground Water Contamination and Countermeasures
At Group production and research bases, we implement thoroughgoing measures to prevent soil and ground water contamination from leakage of chemical substances.
At domestic bases, we implement surveys of past usage conditions of harmful substances (land use history surveys) and work to understand the level of risk related to soil contamination. In addition, in the construction and demolition of buildings, we work closely with the supervisory authorities, and analyze the soil and ground water (soil and ground water surveys) through methods stipulated by law. In the event that contamination is confirmed, we respond appropriately.
In fiscal 2018, we conducted a land use history survey of three domestic production and research bases that had a history of using harmful substances.
With regard to the groundwater pollution that was discovered at the Yoshitomi Plant, which was identified in fiscal 2013, we are conducting clean ups by pumping up ground water, and performing periodic groundwater analyses, following the instructions of the supervisory authorities. Pumping was continued for one year from September 2017, and the concentration of pollutants in the groundwater during that period was shown to be below regulatory standards. Therefore, with the approval of the supervisory authorities, we stopped pumping and continued groundwater analyses only (as of March 2019).