Text Sizesmallmediumlarge Japanese

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) 591/129
Number of employees 3,180
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 2015.

Major Performance

Environmental impact Energy consumption
Item Actual value Item Actual consumption Converted to calorie equivalents (GJ)
Total CO2 emissions 47,749 t-CO2 Electricity 67,342 MWh 655,194
NOx total amount 36,481 kg Heavy oil A 52 kl 2,029
SOx total amount 414 kg Kerosene 2,375 kl 87,174
Total emissions of waste 1,797 t Light oil 3,979 kl 151,990
Amount recycled 1,797 t Town gas 2,621 Nkm3 109,807
Recycling rate 100 % LPG 36 t 1,830
BOD emissions 2,527 kg Other   1,325
COD emissions 3,782 kg Total   1,009,350
Wastewater 416,000 m3
Output of in-house power generation 10,767 MWh
   
Water consumption
Item Actual value
Groundwater 457,527 m3
Industrial water 0 m3
Supply water 1,357 m3
Total 458,884 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 950 770
  ppm Gas turbine 70 20
         
         
Sulfur oxides (SOx) - K-value regulation 7.0 0.77
Soot and dust g/m3N Diesel engine 0.1 0.041
  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 7.4 6.9 7.2
BOD (Biochemical oxygen demand) 160 mg/l 25 18.6 1.1 6.1
COD (Chemical Oxygen Demand) 160 mg/l 25 18.2 3.4 9.1
Suspended solids (SS) 200 mg/l 50 23.8 2 6.5
Mineral oils 5 mg/l 5 0.7 ND 0.5
Copper 3 mg/l 3 ND ND ND
Zinc 2 mg/l 2 0.1 ND 0.1
Nitrogen 120 mg/l 20 19.9 2.0 6.3
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 0.3 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.