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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) 591/125
Number of employees 3,109
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 2014.

Major Performance

Environmental impact Energy consumption
Item Actual value Item Actual consumption Converted to calorie equivalents (GJ)
Total CO2 emissions 51,891 t-CO2 Electricity 72,219 MWh 702,471
NOx total amount 38,464 kg Heavy oil A 93 kl 3,644
SOx total amount 694 kg Kerosene 2,462 kl 90,363
Total emissions of waste 2,051 t Light oil 4,167 kl 159,164
Amount recycled 2,041 t Town gas 3,340 Nkm3 139,929
Recycling rate 99.7 % LPG 35 t 1,734
BOD emissions 2,868 kg Other   1,675
COD emissions 4,373 kg Total   1,098,979
Wastewater 474,000 m3
Output of in-house power generation 12,641 MWh
* 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 950 880
  ppm Gas turbine 70 18
         
         
Sulfur oxides (SOx) - K-value regulation 7.0 0.68
Soot and dust g/m3N Diesel engine 0.1 0.049
    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 7.4 7.0 7.2
BOD (Biochemical oxygen demand) 160 mg/l 25 17.0 1.1 6.1
COD (Chemical Oxygen Demand) 160 mg/l 25 18.4 5.3 9.2
Suspended solids (SS) 200 mg/l 50 8.8 1.2 5.2
Mineral oils 5 mg/l 5 ND ND ND
Copper 3 mg/l 3 ND ND ND
Zinc 2 mg/l 2 0.13 ND 0.06
Nitrogen 120 mg/l 20 8.6 3.8 6.0
Phosphorus 16 mg/l 2 0.4 0.2 0.3
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 - - - -
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.