Environmental Protection System
Environmental Protection System
To promote environmental preservation activities continually and efficiently, in each manufacturing site of KIOXIA Group we have established environmental preservation procedures overseen by a General Manager with clearly defined responsibilities and authority. An Environment Management Committee deliberates environmental preservation across the entire spectrum of environmental activities, including environmental management systems, policies, and objectives. We have further established a Compliance Committee to supervise and ensure full compliance with all relevant environmental laws and ordinances.
Environmental Protection System Diagram


Introduction of environmental-related facilities
In order to prevent contamination by chemical substances and reduce contamination risk, KIOXIA Group has established Structural Design Guidelines to reduce the risk of chemical leaks at environmental facilities.
Examples


Waste gas scrubber
Structures and specifications for stable processing


Overhead piping
Reducing soil contamination risks


Drainage dike
Preventing wastewater from discharging into underground or public water areas


Wastewater treatment
Stable processing system and preventing outflow of wastewater


Double joints in piping
Monitoring and preventing liquid leakages


Six-sided inspection
Six-sided inspection finds abnormality easily at an early stage
Status of water and air quality management
In order to ensure compliance with standards specified in laws, ordinances and agreements, KIOXIA Group has set voluntary management targets for water and air quality at its manufacturing sites, and manages these on a daily basis.
In FY2020, we were not subjected to any government fines or penalties in respect of environmental protection issues such as water or air quality. The table below shows the results for wastewater (COD, T-N, T-P) and exhaust gas (NOx, Soot and dust, SOx).
Outcomes
Wastewater (Actual measured value are averages for FY2020)
COD (chemical oxygen demand)

Law | ≦ 120mg/L |
---|---|
Mie Prefecture Ordinance | ≦ 20mg/L |
Yokkaichi City Pollution Prevention Agreement | ≦ 4.5mg/L |
Voluntary Control Value | ≦ 4mg/L |
Actual in FY2020 | 3.3mg/L |
T-N (total nitrogen)

Law | ≦ 60mg/L |
---|---|
Mie Prefecture Ordinance | N/A |
Yokkaichi City Pollution Prevention Agreement | ≦ 6.5mg/L |
Voluntary Control Value | ≦ 6mg/L |
Actual in FY2020 | 2.1mg/L |
T-P (total phosphorus)

Law | ≦ 8mg/L |
---|---|
Mie Prefecture Ordinance | N/A |
Yokkaichi City Pollution Prevention Agreement | ≦ 0.5mg/L |
Voluntary Control Value | ≦ 0.45mg/L |
Actual in FY2020 | 0.03mg/L |
Exhaust gas (Actual measured value are averages for FY2020)
NOx (nitrogen oxides)

Law | ≦ 120ppm |
---|---|
Mie Prefecture Ordinance | N/A |
Yokkaichi City Pollution Prevention Agreement | ≦ 100ppm |
Voluntary Control Value | ≦ 72ppm |
Actual in FY2020 | 39ppm |
Soot and dust

Law | ≦ 50mg/Nm3 |
---|---|
Mie Prefecture Ordinance | N/A |
Yokkaichi City Pollution Prevention Agreement | ≦ 50mg/Nm3 |
Voluntary Control Value | ≦ 35mg/Nm3 |
Actual in FY2020 | < 1mg/Nm3 |
SOx (sulfur oxides)

Law | ≦ 1.2Nm3/h |
---|---|
Mie Prefecture Ordinance | N/A |
Yokkaichi City Pollution Prevention Agreement | N/A |
Voluntary Control Value | ≦ 0.099Nm3/h |
Actual in FY2020 | < 0.01Nm3/h |
Environmental Plant Audit System
KIOXIA Group audit teams conduct annual environmental audits of its sites based on the following principles: three “Zen" approach (all aspects, all facilities, all staff), three “Gen" approach (actual place, actual product, actual reality), and visual control approach (look, visualize, show).
Through audits, we promote improvement in compliance with laws and regulations, measurement and management of controlled substances, and the 4S approach (sorting, straightening up, sanitation, sweeping). These audits target eight facilities, including the legally mandated wastewater treatment facilities.
KIOXIA Group Environmental Plant Audit System Diagram

