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Controlling Chemical Substances

 The World Summit on Sustainable Development (WSSD) held in 2002 adopted a resolution that chemical substances would be managed in such a manner as to minimize the impact of the chemical substances on human health and the environment, and relevant regulations therefor have been formulated by each member country.
 The Kubota Group sees controlling chemical substances as one of its materiality, and has been advancing initiatives toward reducing the burden on the environment from chemical substances, including the reduction of VOCs (volatile organic compounds) generated in coating processes at production sites, as well as the replacement of fluorocarbons and the prevention of leakage.

Activities towards achieving SDGs

Related SDGs and targets
Major Activity Content
  • Reduction of chemical substance discharge volume, focusing on JIT and automation
  • Improvement of coating efficiency of coating materials, substitution with VOC-free materials
  • Thorough execution of appropriate emission gas and hazardous substance management, risk management, etc.
2020 Activity Targets (KPIs)
  • Medium-Term Environmental Conservation Targets 2020:
     - VOC emission intensity at global production sites: 10% improvement compared to the base year 2014

Medium-Term Environmental Conservation Targets 2020 and the Results for RY2017

Action item Management indicator*2 Scope Base RY Target for RY2020 Result of RY2017 Achievement Status
Reduce VOCs*1 VOC emissions per unit of production Global production sites 2014 -10% -25.1% We are promoting the elimination or reduction of VOC-contained paint, thinner.
  • VOCs (volatile organic compounds) comprise the six substances that are most prevalent in emissions from the Kubota Group: xylene, toluene, ethylbenzene, styrene, 1, 2, 4-trimethylbenzene, and 1, 3, 5-trimethylbenzene.
  • The figures per unit of production represent the intensity of the environmental load per unit of money amount of production. The exchange rate of the base year is used when translating the money amount of production of overseas sites into Japanese yen. The figures per unit of production for the base year were adjusted in RY2017 to improve accuracy.

Controlling and reduction of chemical substances in production sites

1. VOC Emissions

 In RY2017, VOC emissions were 641 tons, a decrease of 8.8% compared to the previous reporting year. Additionally, the VOC emissions per unit of sales improved by 16.9% compared to the previous reporting year. These achievements are mainly due to the measures implemented to reduce VOC emissions, as well as the reduction of production volume at cast iron production sites in Japan.

Trends in VOC Emissions and Emissions per Unit of Sales
 
  • VOCs comprise the six substances that are most prevalent in emissions from the Kubota Group: xylene, toluene, ethylbenzene, styrene, 1, 2, 4-trimethylbenzene, and 1, 3, 5-trimethylbenzene.
  • VOC emissions per unit of consolidated net sales
  • Values for RY2013 through RY2016 were corrected to improve accuracy.

VOC Emissions by Region VOC Emissions by Business
VOC Emissions by Substance
 ●Japan  ●Overseas

2. Release and Transfer of PRTR-designated Substances

 In RY2017, a total of 632 tons of substances stipulated in the PRTR Law* were released and transferred, a decrease of 0.4% compared to the previous reporting year. Additionally, the release and transfer per unit of sales improved by 9.2% compared to the previous reporting year. The release and transfer of PRTR-designated substances slightly decreased due to the reduction of production volume at cast iron production sites, despite an increase in the production volume at machinery production sites. Similar to reduction of VOC emissions, the Group is promoting the ongoing measures to reduce the PRTR-designated substances.

Trends in Release and Transfer of PRTR-designated Substances, and Release and Transfer per Unit of Sales (Japan)
 
  • Total amount of reported substances that are handled at each site (annual volume of 1 ton or more (or 0.5 tons for Specific Class I designations))
  • Release and transfer of PRTR-designated substances per unit of consolidated net sales
  • Values for RY2013 through RY2016 were corrected to improve accuracy.

3. Measures to Reduce VOCs

 The Kubota Group has established its Medium-Term Environmental Conservation Targets and is working on the reduction of VOC emissions from its business sites. The Group has been promoting the risk management of chemical substances handled at production sites and the reduction of VOC-containing materials, such as paint and thinner.
 In RY2017, the Kubota Group reduced the amount of VOCs it handles through efforts such as improving the coating method to improve the coating efficiency of paint, promoting replacement with VOC-free materials, and collecting and recycling used thinner. Kubota Construction Machinery (Wuxi) Co., Ltd. (China) introduced a device to collect thinner, a VOC-containing material, and has collected aapproximately 1.6 tons of VOCs. At machinery production sites in Japan, China, Germany, etc., VOC removal equipment has been introduced in phases. Sites that have introduced the equipment have achieved reduction of VOC emissions into the atmosphere of 90%.
 As a result of the efforts toward achieving the Medium-Term Environmental Conservation Targets 2020 for VOC reduction, global production sites achieved a reduction of 102 tons in RY2017 compared with the case where countermeasures were not implemented from the base year (RY2014). The economic effects of these measures reached 0.16 billion yen compared to RY2014. VOC emissions per unit of production in RY2017 improved by 25.1% compared to RY2014.
 We will continue to promote the reduction of VOC emissions by introducing exhaust treatment equipment that is conscious of compliance with laws and the reduction of burden on neighborhoods, in addition to the efforts to stop the use of VOC-containing paint and thinner or replace them with substitutes.

Control of Ozone-depleting Substances

 The Kubota Group prohibits specified CFCs, which are ozone-depleting substances, from being contained in products or added*1 in manufacturing processes of products. In Japan, replacement of materials containing dichloropentafluoropropane with substitute materials was completed during RY2016, and no ozone-depleting substances subject to notification under the PRTR Law*2 are handled at present.
 In Japan, CFCs that are used in air-conditioners and refrigerating or freezing equipment as refrigerant, are thoroughly managed to ccontrol leakage, in accordance with the standards specified by the Fluorocarbons Emission Control Law.*3

  • For HCFC, intentional adding in products as refrigerant or heat insulator is prohibited.
  • Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements in the Management Thereof
  • Act on the Rational Use and Proper Management of Fluorocarbons

Emissions of Air Pollutants

 The Kubota Group has set its own control values that are stricter than the emission standards of relevant laws and regulations. In order not to allow the exceeding of standard values, the Group implements thorough daily management activities, such as monitoring operation of the smoke and soot-generating facilities and inspecting the dust collecting equipment.
 The amounts of emissions of air pollutants in RY2017 were 17.5 tons for SOx (down by 44.4% from the previous year), 68.8 tons for NOx (down by 27.0%), and 21.9 tons for soot and dust (down by 17.4%). We will continue to reduce emissions of air pollutants through initiatives such as controlling sources by fuel conversion and maintaining dust collecting equipment.

Monitoring Groundwater

 Results of groundwater measurements conducted on the premises of the business sites that used organic chlorine-based compounds in the past are as shown below.


Groundwater monitoring (RY2017)

Business site Substance Measured groundwater value Environmental standard
Tsukuba Plant Trichloroethylene Non-detected (less than 0.0001 mg/L) Less than 0.03 mg/L
Utsunomiya Plant Trichloroethylene Non-detected (less than 0.001mg/L) Less than 0.03 mg/L

Reduction of Chemical Substances Contained in Products

 The Kubota Group has set rules for identifying and properly managing chemical substances in products in order to comply with REACH Regulations* in Europe and other chemical substance regulations.
 Since 2010, chemical substances in products have been classified as one of the three following categories and managed appropriately. With cooperation from our suppliers, we investigate chemical substances in products on a global basis.

* The European Union (EU) Regulations for Registration, Evaluation, Authorization and Restriction of Chemicals

- Three Control Levels -
  1. Substances to be Prohibited: Should not be contained in products
  2. Substances to be Restricted: Should not be contained in products under certain conditions and applications
  3. Substances to be Controlled: Presence in products should be recognized

Related Information

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