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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) 235/28
Number of employees 1,052
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 2013.

Major Performance

Environmental impact Energy consumption
Item Actual value Item Actual consumption Converted to calorie equivalents (GJ)
Total CO2 emissions 4,270 t-CO2 Electricity 6,169 MWh 60,017
NOx total amount 1,763 kg Heavy oil A 578 kl 22,611
SOx total amount 1,261 kg Kerosene 0 kl 0
Total emissions of waste 484 t Light oil 22 kl 830
Amount recycled 484 t Town gas 0 Nkm3 0
Recycling rate 100 % LPG 84 t 4,194
BOD emissions 461 kg Other   400
COD emissions 480 kg Total   88,052
Wastewater 83,636 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) 82
Sulfur oxides (SOx) - K-value regulation 7.0 0.27
Soot and dust g/m3N Small boilers (0.5) 0.004
* Regulated values are in accordance with the Air Pollution Control Law and local regulations.
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 7.3 7.0 7.2
BOD (Biochemical oxygen demand) 160 mg/l 25 13.0 1.9 5.5
COD (Chemical Oxygen Demand) 160 mg/l 25 8.5 2.8 5.7
Suspended solids (SS) 200 mg/l 50 7.6 3.6 5.8
Mineral oils 5 mg/l 5 ND ND ND
Copper 3 mg/l 3 ND ND ND
Zinc 2 mg/l 2 0.25 ND 0.08
Nitrogen 120 mg/l 20 5.9 4.1 5.0
Phosphorus 16 mg/l 2 0.8 0.6 0.7
Cadmium 0.1 mg/l 0.1 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 0.3 mg/l 0.3 ND ND ND
Tetrachloroethylene 0.1 mg/l 0.1 ND ND ND
Dichloromethane 0.2 mg/l 0.2 ND ND ND
1,1,1-trichloroethane 3 mg/l 3 ND ND ND
* Regulated values are in accordance with the Water Pollution Control 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.