Data on Environmental Impacts of Business Activities
CY2022 Key Performance
Changes in Environmental Impact Data Over Time
With the gradual expansion of our factory production capacity, both the usage (INPUT) and emissions (OUTPUT) of environmental impact data are increasing. However, we are working to reduce our environmental impact through proper management of energy, greenhouse gases (GHG), water, chemicals, and waste.
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GHG Emissions (Scopel,Scope2)
Unit:Tons-co2
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Water Usage (Purchased volume)
Unit:TCM
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PRTR Chemical Substances Usage
Unit:Tons
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Industrial Waste
Unit:Tons
※The CO2 conversion factor for power consumption was calculated as 0.570 t-CO2/MWh until 2019, and the emission factor by electric utility is used since 2020.
Greenhouse Gas (GHG) Emissions in 2022
USJC has calculated our GHG emissions in accordance with ISO14064-1:2018 and our carbon footprint (CFP) in accordance with ISO14067:2018. We will use this information to proactively engage in decarbonization with our customers.
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- Calculation period
- January 1, 2022 -December 31, 2022
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- Total GHG emissions
- 307,736 t-CO2e
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- CFP※
- 781.0 ㎏-CO2e per sheet
※CFP：GHG Emissions per wafer USJC manufactured.
Breakdown
| Category of Emission | GHG Emissions (t-CO2e) | Percentage (%) | |
|---|---|---|---|
| Scope 1 | Direct GHG Emissions | 51,421 | 16.7 |
| Scope 2 | Indirect GHG Emissions from Supplied Energy | 136,346 | 44.3 |
| Scope 3 | Indirect GHG Emissions other than Scope1 or Scone2 | 119,969 | 39.0 |
| Total Amount of Emissions | 307,736 | 100.0 | |
| Breakdown of Scope3 | GHG Emissions (t-CO2e) | Percentage (%) | |
|---|---|---|---|
| Category 1 | Purchased Products and Services | 62,547 | 52.1 |
| Category 2 | Capital Goods | 29,860 | 24.9 |
| Category 3 | Fuel and Energy Activities not included in Scope1 or Scope2 | 25,241 | 21.0 |
| Category 4 | Transportation, Distribution ( Upstream) | 378 | 0.3 |
| Category 5 | Waste Generated in Operation | 320 | 0.3 |
| Category 6 | Business Travel | 62 | 0.1 |
| Category 7 | Employee Commuting | 1,440 | 1.2 |
| Category 8 | Transportation, Distribution (Downstream) | 120 | 0.1 |
Since 2022, the global warming potential (GWP) of the IPCC 6th Assessment Report has been applied.
In addition, a part of Scope 3 was calculated using "National Research and Development Agency, National Institute of Advanced Industrial Science and Technology, Safety Science Research Division IDEA Ver.3.2."
Water Footprint in 2022
USJC has calculated our water footprint (WFP
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- Comprehensiveness
- Non-Comprehensive Water Footprint
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- Calculation Period
- January 1, 2022 - December 31, 2022
※WFP：Water Usage per wafer USJC manufactured
Breakdown
| Usage Phase | Green Water (㎡/wafer) |
Blue Water (㎡/wafer) |
Gray Water (㎡/wafer) |
Total (㎡/wafer) |
|---|---|---|---|---|
| Supplier Phase | 0.0 | 13.2 | 21.1 | 34.3 |
| Manufacturing Phase | 0.0 | 12.2 | 11.7 | 23.9 |
| Total Volume Usage | 0.0 | 25.5 | 32.7 | 58.2 |
- Supplier Phase 58.9%
- Blue Water
- Gray Water
- Manufacturing Phase 41.1%
- Blue Water
- Gray Water
Citing the Calculation Methodology of The Water Footprint Assessment Manual (2011)
- Green Water
- Rainwater withdrawal
- Blue Water
- Water withdrawal other than rainwater
- Gray Water
- Amount of wastewater discharged when the pollution concentration of wastewater is diluted until it becomes equal to the environmental standard of the discharge water body(Indicators used: BOD, COD, total nitrogen, total phosphorus, SS)
In addition, part of the WFP at the raw material procurement stage was calculated using "National Research and Development Agency, National Institute of Advanced Industrial Science and Technology, Safety Science Research Division IDEA Ver.3.2."
Reduce Discharges of VOCs
USJC sets up exhaust-gas treatment equipment for emission prevention of acid and alkaline gas, takes measures to remove organic exhaust-gas (VOCs) by adsorption systems using activated charcoal, and works to reduce the effects on the environment.
In 2022, VOCs emissions increased by approximately 1.3 times compared to the previous year due to increased plant operations. Since VOCs emissions are expected to increase in the future due to high operations, we built an activated carbon adsorption facility for VOCs in 2023 to reduce emissions.
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VOC emissions
Unit:Tons
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Reduce PFCs Emissions
We have been making effort to reduce GHG emissions other than CO2 (PFC, HFC, NF3, SF6). On production lines, catalytic decomposition systems have been installed on all equipment producing GHG, and we aggressively promote GHG emission reduction.
The calculation method has been changed from the IPCC Guidelines 2006 Revision to the 2019 Revision starting with the 2021 results. As a result, more of by-product PFCs generation and emissions were included in the calculation.
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PFCs Emissions
Unit:Tons-co2
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