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Komatsu's Environmental and Social Activities Data


Site Data (Japan)  Oyama Plant

Overview

Year of Establishment 1962
Location Oyama, Tochigi Prefecture
Main Products Engines for construction/industrial machinery, diesel generators, hydraulic equipment, axle, excimer lasers, etc.
Site/Green Landscape (1,000 m2) 591/126
Number of employees 3,170
Date of ISO14001 certification acquisition May 1997
* 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 41,683 t-CO2 Electricity 56,307 MWh 548,675
NOx total amount 22,182 kg Heavy oil A 33 kl 1,286
SOx total amount 18 kg Kerosene 1,402 kl 51,457
Total emissions of waste 1,545 t Light oil 4,243 kl 162,086
Amount recycled 1,545 t Town gas 2,620 Nkm3 109,757
Recycling rate 100 % LPG 34 t 1,692
BOD emissions 2,108 kg Other   785
COD emissions 3,023 kg Total   875,739
Wastewater 356,300 m3
Output of in-house power generation 9,063 MWh
   
Water consumption
Item Actual value
Groundwater 395,100 m3
Industrial water 0 m3
Supply water 1,672 m3
Total 396,772 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

Air
Item Unit Facility Regulated value Actual value
Nitrogen oxides (NOx) ppm Diesel engine 950 940
  ppm Gas turbine 70 15
         
         
Sulfur oxides (SOx) - K-value regulation 7.0 0.38
Soot and dust g/m3N Diesel engine 0.1 0.03
  g/m3N Gas turbine 0.05 0.001
         
* Regulated values are in accordance with the Air Pollution Control Law and local regulations.
Wastewater
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 7.2
BOD (Biochemical oxygen demand) 160 mg/l 25 18 1.2 5.9
COD (Chemical Oxygen Demand) 160 mg/l 25 13.6 3 8.5
Suspended solids (SS) 200 mg/l 50 23 2.4 8.1
Mineral oils 5 mg/l 5 ND ND ND
Copper 3 mg/l 3 0.2 ND 0.1
Zinc 2 mg/l 2 0.1 ND 0.1
Nitrogen 120 mg/l 20 9.9 1.1 5.1
Phosphorus 16 mg/l 2 0.4 0.1 0.3
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.