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Reducing the Amount of Water Received

In response to a global increase in concerns regarding water problems, Toshiba Group is promoting sustainable water resource management. Each of our production sites has incorporated reducing the amount of water received into its annual plan in order to develop specific strategies and conduct follow-up surveys on an ongoing basis. We are promoting wide-ranging initiatives including recycling the wastewater generated in sites and introducing systems for using rainwater.

Results of FY2017

The total amount of water received in FY2017 was 19.4 million m³ and the amount of water received per unit production was 89% of the total for FY2013, exceeding the initial target by 10 percentage points.

Future initiatives

We will promote recycling wastewater and using rainwater and aim to improve the amount of water received per unit production by 4% of the FY2013 level in FY2020.

Amount of water received per unit production

  FY2013
(Benchmark year)
result
FY2017
target
FY2017
result
FY2018
target
FY2020
(Final fiscal year)
goal
Amount of water received 21.2 million m³ 19.4 million m³
Per unit production 100% 99% 89% 98% 96%

Breakdown of the amount of water received (FY2017)
[Image] Breakdown of the amount of water received

Case : Environmental Impact Reduction Measures at Toshiba Subsidiaries in India

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Initiatives for water risk prevention

Toshiba Group is working to enhance analysis and management of production sites located in high-water-risk regions and sites that need large amounts of water. To analyze data on high-water-risk regions, we used "Aqueduct", a water risk assessment tool developed by the World Resources Institute (WRI), and we considered water problems from various perspectives, including the risk of pollution by wastewater and level of interest in water issues among area residents, in addition to the physical amounts of water resources in individual river basins.

Assessment of water risks in regions with sites

Working in collaboration with InterRisk Research Institute & Consulting, Inc., Toshiba Group selected eight production sites located in areas where water is used in large quantities or with high water risks to conduct water risk assessment at such sites. We assessed water demand (current demand and future trends), water disaster risks, and water contamination vulnerabilities (public health and ecosystems) from various perspectives in river basins where our sites are located. Based on the information acquired, we will review water risk prevention measures going forward.

Water Risk Assessment Results (Example)

  Water demand Water
disasters
Water contamination
vulnerabilities
Total
Evalua-
tion
Present Future
trends
Public
health
Ecosystem
Site A (Japan)BAA+A-A+A-
Site B (Philippines)BC+A+B-A+B+
Site C (India)C+A-A+B-BB

Assessment on a 9-point scale from A+ (low risk) to C- (high risk)

Correlation analysis between rainfall and the amount of water used in regions with Toshiba production sites

Also, Toshiba Group is analyzing the correlation between the monthly amount of water received by factories and rainfall in regions where our sites are located. Assuming that months with small amounts of rainfall are periods with high water risks, we aim to contribute to water resource conservation in surrounding areas by reducing the amount of water received as much as possible.

Amount of water received and rainfall (example)
[Image] Amount of water received and rainfall (example)

In the months enclosed by blue circles, the amounts of water received and rainfall are large. By contrast, in the months enclosed by orange circles, the amount of rainfall is low. In these months, there is a need to reduce the amount of water used.

By performing such an analysis at each site, we aim to contribute to water conservation in areas with high water risks as well as to raise awareness about water resources at sites in areas assessed as having low water risks.

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Case : Waste management and local communication that support semiconductor production

Japan Semiconductor Corporation Oita Operations

Japan Semiconductor Corporation Oita Operations manufactures mixed signal ICs and other semiconductors. During production, the plant uses many chemicals, all of which are appropriately treated in order to discharge wastewater that meets the various applicable standards. In addition, the plant uses wastewater to breed Japanese freshwater snails, which fireflies feed on, and has worked with local community organizations, local government organizations, and companies in the vicinity to release the snails in the upstream of the Kitabana River, thereby successfully breeding fireflies. (2014: Several fireflies ⇒ 2015: 1,200 fireflies observed)

For these activities, the plant was awarded the Ministry of the Environment Award at the FY2015 Model Environmental Initiative Award Celebration held by the Ministry of the Environment. The plant will continue to promote local communication while expanding its ecosystem preservation activities.

[Image] Working with a local community association to confirm the release of freshwater snails (feed for fireflies)
Working with a local community association
to confirm the release of freshwater snails
(feed for fireflies)

[Image] Raising employees' environmental awareness by creating artwork with aluminum cans (firefly motif )
Raising employees' environmental awareness
by creating artwork with aluminum cans
(firefly motif )

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Case : Initiative for water resource management at Oita Operations

Oita Operations, Toshiba Corp.

To meet its need for large amounts of water necessary to manufacture semiconductors, Oita Operations promotes comprehensive, strategic water resource management.

Reinforcing the transport tubes connecting multiple pure-water production systems has enabled efficient resource management, greatly reducing industrial water consumption. In addition, separately collecting relatively clean wastewater has increased the amount of water recycled. Wastewater treated and discharged into the river is monitored continuously based on independent standards stricter than legal requirements. In collaboration with the local community, Oita Operations is also developing activities for cleaning areas along the river and ecosystem conservation activities.

[Image] Wastewater treatment facility designed to discharge wastewater cleaner than the river water
Wastewater treatment facility designed to discharge wastewater cleaner than the river water

[Image] River survey conducted along the Kitahana River to restore firefly habitats
River survey conducted along the Kitahana River to restore firefly habitats

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