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Komatsu's Environmental and Social Activities Enhancing Quality of Life


Environmental Risk Management  Promoting Legal Compliance, and Pollution Mitigation and Prevention

Komatsu Group companies periodically report and archive environmental measurement results, in accordance with applicable laws and regulations of national and local authorities. Komatsu had no violations relating to the environment, and no major accidents that could result in pollution, in FY2012.

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 to check for contamination from volatile organic compounds (VOC) from cleaning solvents that were used in the past.

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.

In FY2012, change in land character notifications were filed at the Kanazawa, Oyama and Koriyama Plants, in accordance with the provision of Article 4, Amended Soil Contamination Countermeasures Act. No survey order was issued from administrative authorities in relation to these sites because there was no concern regarding possible contamination.

In addition, at the Osaka Plant, a report for Article 12 was submitted for land specified by Article 14 as an area requiring change in land character notifications, and the change in land character was undertaken.

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
*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, Research Division in Hiratsuka, Techno Center in Izu and Field Testing Department in Oita.

Managing PCB (Polychlorinated Biphenyl) Waste

Komatsu stores and manages PCB-containing waste, such as transformers, in accordance with Japanís "Law Concerning Special Measures Against PCB Waste" and the "Waste Disposal and Public Cleansing Law." In FY2008, Komatsu entrusted PCB disposal to the Japan Environmental Safety Corporation (JESCO). A total of 234 PCB-containing capacitors were disposed of by FY2011.

In FY2012, JESCO disposed of an additional 101 capacitors. Additionally, Komatsu conducted a second review into the status of PCB-containing stabilizers, including those for fluorescent lamps, used in the Komatsu Group in Japan. As a result, about 3,900 condensers, including some in use, were found to contain PCB.

Continuing through 2013, we plan to carry out further disposal work to locate low-concentration PCB waste as well.

Number of PCB-containing Transformers and Capacitors in Storage

Company Site Number of disposal in FY2012 Number of storage
High density Low density
Komatsu Ltd. Head office 0 0 7
Awazu Plant 9 58 112
Osaka Plant 0 0 31
Oyama Plant 60 253 41
Shonan Plant 0 2 1
Tochigi Plant 0 5 11
Field Testing Department 0 0 3
Construction & Mining Equipment Marketing Division 0 0 3
Subtotal of Komatsu 69 318 238
Komatsu Castex Ltd. 0 0 20
Komatsu NTC Ltd. 29 2 0
Komatsu Cabtec Co., Ltd. 0 2 12
Komatsu House Ltd. 0 1 4
Komatsu Construction Equipment Sales and Service Japan Ltd. 3 17 15
Komatsu Rental Ltd. 0 0 1
Total of Komatsu group 32 22 52
Total 101 340 261
-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.
-The share from the former Kawagoe Plant is included in the Head office total.