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About Toshiba > Social and Environmental Activities > Environmental Management > Eco Processes > Management of Chemicals:
Toshiba Group is working to grasp the extent of emissions of sulfur oxides (SOx) and nitrogen oxides (NOx), both of which are major causes of air pollution, as well as of water pollutants and is also working to ensure appropriate management of such emissions. Each business site voluntarily sets the maximum permissible levels of concentrations for these substances and complies with these prescribed standards, but total emissions fluctuate as production volumes increase or decrease.
In accordance with the Air Pollution Prevention Act, the amount of impact is calculated by multiplying the concentration of each substance by the amount of the substance emitted.
In accordance with the Water Pollution Control Act, the amount of impact is calculated by multiplying the concentration of each substance by the amount of the substance discharged.
Starting in FY2007, data include those for Sigma Power Ariake and Sigma Power Tsuchiura.
The Oita Operations takes in and uses industrial water for semiconductor manufacturing, which comes from clear waters from the Ono River, one of the cleanest streams in Japan. The used industrial water is categorized into detailed types for advanced treatment and treated such that its quality will become equivalent to the original waters to such an extent that it can even support carp, following which it will be returned to the river.
Wastewater treatment facility
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