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Tamaki Plant: Environmental Data (FY 2022)
Environmental Performance
| Category | Unit | FY2021 | FY2022 |
|---|---|---|---|
| Energy use | kL/year (crude oil equivalent) | 8,757 | 10,005 |
| CO2 emissions | t-CO2/year | 16,112 | 17,178 |
| Water usage | m³/year | 87,683 | 112,326 |
| Industrial waste emissions | t/year | 469 | 543 |
| Discharge volume (wastewater treatment facility) | m³/year | 33,493 | 45,778 |
Water quality related to discharge
| Category | Unit | Regulatory threshold | Measured value |
|---|---|---|---|
| Hydrogen ion concentration (pH) | - | More than 5.0 and less than 9.0 | 7.0 |
| Biochemical oxygen demand (BOD) | mg/L | Less than 600 | 0.8 |
| Suspended solids (SS) | mg/L | Less than 600 | 1.9 |
| Content of n-hexane extractables | mg/L | Less than 5 | Less than 1 |
Noise-related
| Unit | Regulatory threshold | Measured value | |
|---|---|---|---|
| Morning (6 am～8 am) | dB | Less than 55 | 48.0 |
| Afternoon (8 am～7 pm) | Less than 60 | 51.6 | |
| Late afternoon (7 pm～10 pm) | Less than 55 | 53.0 | |
| Night (10 pm～6 am the following day) | Less than 50 | 47.8 |
Vibration-related
| Time division | Unit | Regulatory threshold | Measured value |
|---|---|---|---|
| All days | dB | Less than 60 | Less than 30 |
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