Promoting Legal Compliance, and Pollution Mitigation and Prevention

Independent Practitioner's Assurancecheckmark

Komatsu Group companies periodically report and archive environmental measurement results, in accordance with applicable laws and regulations of national and local authorities.
In FY2016, there were no infractions of legal regulations regarding the environment.
No major accidents or legal violations occurred that would threaten environmental contamination.

Addressing Soil and Groundwater Contamination

Komatsu has established guidelines for testing soil and groundwater at our Japan facilities, and we perform investigations according to applicable laws and regulations at business units that are to be sold, closed, or demolished. If contamination is found, the Company takes appropriate measures under the supervision of local authorities.
We are performing voluntary investigations at currently operating business units in order to check for contamination from volatile organic compounds (VOC) from cleaning solvents that were used in the past and working on clean up measures.
Komatsu has been surveying soil and groundwater for VOC contamination at Group business units in Japan since 2005. Business unit sites at which contamination has been detected have implemented countermeasures. The Company has selected methods to clean up the sites as quickly as possible.
Work at the Oyama Plant was completed in FY2009. The clean up work at the other sites are continuing, and at the same time we are also checking on the effectiveness of the clean up measures being taken.
Going forward, along with driving the clean up activities, we will monitor groundwater at the site boundaries to make sure that off-site outflow of groundwater does not exceed the standards.

Status of Soil and Groundwater Cleanup in Japan

Business unit Cleanup method Cleanup status
Awazu Plant

Excavation and removal, soil vapor extraction, groundwater withdrawal and aeration, bioremediation

In process

Komatsu Plant
(formerly)

Excavation and removal, groundwater withdrawal and aeration, bioremediation

In process

Osaka Plant

Soil vapor extraction, air sparging, groundwater withdrawal and aeration, bioremediation

In process

Shonan Plant

Excavation and removal, groundwater withdrawal and aeration

In process

Tochigi Plant

Excavation and removal, bioremediation

In process

  1. Bio-remediation is purification process of hazardous materials through utilizing micro organisms and returning the soil to a non-hazardous state.
  • Surveys revealed no contamination for the Koriyama Plant, Technology Innovation Center in Hiratsuka, Techno Center in Izu and Field Testing Department in Oita.

Managing PCB (Polychlorinated Biphenyl) Waste

Komatsu stores and disposes PCB-containing waste, such as transformers and fluorescent stabilizers, in accordance with Japan's "Law Concerning Special Measures Against PCB Waste" and the "Waste Disposal and Public Cleansing Law."
Since FY2008, Komatsu entrusted PCB disposal to the Japan Environmental Safety Corporation (JESCO) and about 90% of the PCB-containing transformers and stabilizers have been disposed by FY2016.
Continuing through FY2017, we plan to carry out further disposal work to locate low-concentration PCB waste as well.

Number of High Concentration PCB-containing Transformers and Stabilizers in Storage

Company Site Transformers Stabilizers
Number of disposal in FY2016 Number of awaiting disposal Number of disposal in FY2016 Number of awaiting disposal
Komatsu Ltd. Head office

0

4

0

30

Awazu Plant

16

2

0

78

Osaka Plant

0

0

0

93

Oyama Plant

34

3

0

2

Shonan Plant

2

0

0

3

Tochigi Plant

5

0

0

0

Field Testing Department

0

0

4

0

Construction & Mining Equipment Marketing Division

0

0

0

131

Subtotal of Komatsu

57

9

4

337

Komatsu NTC Ltd.

0

2

0

76

Komatsu Construction Equipment Sales and Service Japan Ltd.

1

3

0

349

Total of Komatsu group

1

5

0

425

Total

58

14

4

762

  • The share from the former Komatsu Plant was transferred to the Awazu Plant. The share from the former Mooka Plant was transferred to the Oyama Plant.