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Komatsu's Environmental and Social Activities Data

Site Data (Japan)  Tochigi Plant


Year of Establishment 1968
Location Oyama, Tochigi Prefecture
Main Products Forklift trucks, mini excavators, mini wheel loaders
Site/Green Landscape (1,000 m2) 215/25
Number of employees 650
Date of ISO14001 certification acquisition February 1998
* The number of employees includes those working for Komatsu affiliates on the premises.
* The number of employees as of the end of March 2016.

Major Performance

Environmental impact Energy consumption
Item Actual value Item Actual consumption Converted to calorie equivalents (GJ)
Total CO2 emissions 3,383 t-CO2 Electricity 5,222 MWh 50,891
NOx total amount 2,874 kg Heavy oil A 550 kl 21,504
SOx total amount 1,181 kg Kerosene 0 kl 0
Total emissions of waste 377 t Light oil 46 kl 1,751
Amount recycled 377 t Town gas 0 Nkm3 0
Recycling rate 100 % LPG 67 t 3,341
BOD emissions 102 kg Other   338
COD emissions 136 kg Total   77,825
Wastewater 20,145 m3
Output of in-house power generation 280 MWh
Water consumption
Item Actual value
Groundwater 26,284 m3
Industrial water 0 m3
Supply water 0 m3
Total 26,284 m3
* Refer to the Data on Environmental Impact Resulting from Business Activities for details on the methods used to calculate amounts.
* Total emissions of waste are expressed as a composite of the amount recycled (excluding valuables) and the amount disposed.
* Recycling rate is calculated by dividing the amount recycled (including valuables) by the amount generated (including valuables).
* Total emissions of BOD and COD are calculated by multiplying the average concentration by the amount of wastewater.
* The heat energy conversion factor is calculated in keeping with Greenhouse Gas Emission Calculation - Reporting Manual, which is based on the act on Promotion of Global Warming Countermeasures.

Compliance Conditions to Major Regulations

Item Unit Facility Regulated value Actual value
Nitrogen oxides (NOx) ppm Small boilers (260) 110
Sulfur oxides (SOx) - K-value regulation 7.0 0.1
Soot and dust g/m3N Small boilers (0.5) 0.006
* Regulated values are in accordance with the Air Pollution Control Law and local regulations.
* Regulated values in accordance with NOx and particles of soot for the small boiler are the voluntary restrains.
Item Regulated value according to the Water Pollution Control Law Regulated value Actual value
Maximum Minimum Average
pH 5.8-8.6 5.8-8.6 8.4 6.9 7.3
BOD (Biochemical oxygen demand) 160 mg/l 25 13.9 1.5 5.1
COD (Chemical Oxygen Demand) 160 mg/l 25 14.8 3.1 6.8
Suspended solids (SS) 200 mg/l 50 20.4 1.6 10.4
Mineral oils 5 mg/l 5 1.4 ND 0.7
Copper 3 mg/l 3 ND ND ND
Zinc 2 mg/l 2 0.2 ND 0.1
Nitrogen 120 mg/l 20 11.6 0.8 5.2
Phosphorus 16 mg/l 2 1.0 ND 0.4
Cadmium 0.03 mg/l 0.03 ND ND ND
Lead 0.1 mg/l 0.1 ND ND ND
Chromium (VI) 0.5 mg/l 0.1 ND ND ND
Trichloroethylene 0.1 mg/l 0.1 ND ND ND
Tetrachloroethylene 0.1 mg/l 0.1 ND ND ND
Dichloromethane 0.2 mg/l - - - -
1,1,1-trichloroethane 3 mg/l 3 ND ND ND
* Regulated values are in accordance with the Water Pollution Control Law, Sewerage Law and local regulations.
* ND ("not detected") indicates a value below the lower limit of detection.
* ND is considered to be the lower limit of detection when calculating the average.
* Other items are confirmed to be below the regulated value.