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

Environmental Preservation System Diagram Environmental Preservation 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

Waste gas scrubber
Structures and specifications for stable processing

Overhead piping

Overhead piping
Reducing soil contamination risks

Drainage dike

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

Wastewater treatment

Wastewater treatment
Stable processing system and preventing outflow of wastewater

Double joints in piping

Double joints in piping
Monitoring and preventing liquid leakages

Six-sided inspection

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 ≦120 mg/L, Mie Prefecture Ordinance ≦20 mg/L, Yokkaichi-city Pollution Prevention Agreement ≦4.5 mg/L, Voluntary Control Value ≦4.0 mg/L, Actual in FY2020 3.3 mg/L

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

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

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

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/N㎥, Mie Prefecture Ordinance N/A, Yokkaichi-city Pollution Prevention Agreement ≦50mg/N㎥, Voluntary Control Value ≦35 mg/N㎥, Actual in FY2020 <1mg/N㎥

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 ≦1.2N㎥/h, Mie Prefecture Ordinance N/A, Yokkaichi-city Pollution Prevention Agreement N/A,  Voluntary Control Value 0.099N㎥/h, Actual in FY2020 < 0.01N㎥/h

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

KIOXIA Group Environmental Plant Audit System Diagram KIOXIA Group Environmental Plant Audit System Diagram