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Preventing Contamination and Reducing Contamination Risks

In order to prevent contamination with chemical substances and reduce contamination risks, Toshiba Group independently established the Structural Design Guidelines to prevent leaks of chemicals at its eight types of environment-related facilities (including wastewater treatment plants), and its overseas sites are also promoting continuous improvements in this area. In FY2015, Toshiba Group achieved a compliance rate of 99.7% for all of Toshiba's sites and 95.5% for all of its group companies' sites in Japan.

In its overseas operations, at the time of establishing a new business or relocating a business, Toshiba Group also assesses contamination risks by investigating land use and contamination histories. Assessments are made in accordance with laws and regulations in each country, and Toshiba Group's own rigorous standards are applied in countries without relevant legislation.

Rate of compliance with the Structural Design Guidelines (FY2015)
[Image] Rate of compliance with the Structural Design Guidelines

In order to ensure effective prevention of groundwater contamination, an act revising part of the Water Pollution Control Act was promulgated on June 22, 2011 and came into force on June 1, 2012. To prevent groundwater from becoming contaminated with hazardous substances*, new provisions have been added that require those who install facilities where hazardous substances are used, stored, or otherwise handled to comply with structural, equipment, and usage standards to block hazardous substances from entering the ground and to record and maintain records of periodic inspection results.

As early as FY1990, Toshiba Group established the Structural Design Guidelines, an initiative that anticipated the purpose of these revisions to the Act, and has since been working to improve compliance with these guidelines by developing measures to prevent underground infiltration and by conducting periodic facility inspections to facilitate on-site improvements.

Through such measures, we aim to further reduce environmental risks.

*
As stipulated in Article 2 of the Order for Enforcement of the Water Pollution Control Act, the 28 hazardous substances subject to regulation include cadmium, lead, and trichloroethylene (as of April 2016).

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Case Study: Soil purification at Saku Operations

Saku Operations, Toshiba Corp.

The result of a survey conducted on the Saku Operations premises based on the Soil Contamination Countermeasures Act revealed that some parts of the premises were contaminated beyond what the standards permit. Therefore, we have been working to purify the soil.
We removed buildings to implement measures to reduce contamination. We plan to remove soil on the premises that has been contaminated beyond what the standards permit.

[Image] Overview of the construction site

[Image] Overview of the construction site
Overview of the construction site

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Case Study: Soil countermeasures at Kitakyushu Operations

Kitakyushu Operations, Toshiba Corp.

In the manufacturing area at Kitakyushu Operations, Toshiba conducted investigations based on the Soil Contamination Countermeasures Act upon the abolition of specified facilities stipulated in the Water Pollution Control Act. Since soil contamination exceeding the minimum permissible level was confirmed in some locations, the company removed the buildings and began work to purify the contaminated soil. Plans call for the company to prevent the spread of contamination to areas around the factory site using the SMW method* and to remove contaminated soil at the site.

*
The SMW method involves mixing soil with cement slurry at a construction site and using the mixture to build continuous walls in the ground.

[Image] Overview of the construction site
Overview of the construction site

[Image] Location where the SMW method was used
Location where the SMW method was used

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Case Study: Treatment of volatile organic compounds in soil, Biostimulation method

Himeji Operations, Toshiba Corp.

Toshiba used the biostimulation method to purify volatile organic compounds contained in the soil at Himeji Operations. This method injects purifying chemicals that provide nutrients to microorganisms into the targeted soil in order to activate anaerobic microorganisms within the soil, thereby dechlorinating hazardous substances (trichloroethylene, etc.) and decomposing them into harmless substances.

[Image] Treatment of volatile organic compounds in soil, Biostimulation method

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