Waste/ chemical substances/​ ​pollution prevention

The Idemitsu Group is striving to reduce the environmental impact by reducing the amount of waste generated and promoting the reuse of raw materials and the use of recycled materials from the perspective of effective Resources use.

The main wastes generated through our business include waste catalysts from Refinery refining processes, residue (sludge) from tank cleaning, and sludge collected from wastewater treatment facilities. Through intermediate processing such as incineration, dehydration, and dissolution, these wastes are reduced in volume and rendered harmless, and by recycling them into raw materials for cement, etc., we aim to achieve "zero emissions," which reduces the amount of final disposal to 1% or less. , we are continuing our efforts.

The petroleum and chemical industries have each set voluntary targets ^* for reducing the amount of final disposal of industrial waste as part of efforts to create a recycling-oriented society promoted by the Japan Business Federation. Based on these targets, we aim to keep the amount of final disposal of industrial waste at each Refinery and petrochemical plant to 1.0% or less of the amount generated.
The increase in the final disposal rate in fiscal 2023 will be due to incineration ash from the Tokuyama Biomass Power Plant.

*Oil (Petroleum Federation):
<Industry-specific goals> Maintain and continue the zero emissions (final disposal rate of 1% or less) achieved in FY2020 even after FY2021.
Chemistry (Japan Chemical Industry Association):
<FY2025 target value for final disposal amount of industrial waste> 170,000 tons or less.
<Industry-specific targets>
Reduce final (landfill) disposal amount to 170,000 tons or less by FY2025.
Maintain a Resources rate of 65% or higher until fiscal 2025.

In addition to responding to increasingly strict chemical substance management regulations both in Japan and overseas, the Group is working on chemical substance management from the following perspectives to realize production activities and products that consider the environment and human health, based on the "Basic Principles for Quality Assurance" and the "Basic Principles for Safety, Health and the Environment."

Among the substances regulated by the PRTR Law ^*1 (including HAP ^*2 and POPs ^*3), volatile substances such as benzene, toluene, xylene, and n-hexane, which are contained in crude oil, petroleum products, and petrochemical raw materials, Some of the high-concentration substances are emitted into the atmosphere as VOCs ^*4 when they are taken into and discharged from storage tanks or shipped to lorries or ships. Our group strives to reduce emissions by storing these chemical substances in floating roof tanks with low volatility and collecting VOCs at the time of product shipment. Any chemical substances transferred Complex are also properly disposed of in accordance with the Waste Management and Public Cleansing Act.

*1 PRTR: Pollutant Release and Transfer Register (chemical substance release and transfer amount notification system)
*2 HAP: Hazardous air pollutants
*3 POPs: Persistent organic pollutants
*4 VOC: Volatile Organic volatile organic compounds

Based on the PCB Special Measures Law and the Basic Plan for PCB Waste Disposal, Refineries/Complexes are taking steps to dispose of oil containing PCBs and equipment that contains them within the designated time periods.

In accordance with the Act on Rational Use and Proper Management of Fluorocarbons, which came into force on April 1, 2020, the Group is working to prevent the leakage of fluorocarbons. For large process equipment at Refineries/Complexes that uses HCFCs, which have an ozone-depleting effect, we are promoting the renewal of these equipment during regular maintenance.

In order to prevent pollution and reduce the burden on the environment, we not only comply with environmental laws but also take voluntary measures in accordance with our company regulations (Basic Principles for Safety, Health, and the Environment).

Air pollutants emitted through our group's operations include SOx, NOx, and soot emitted from boilers and heating furnaces, and VOCs emitted from crude oil and petroleum product tanks, ships, and lorry shipping equipment. . For this reason, Refineries/Complexes conduct operational management that complies with laws, ordinances, emission standards, and agreed values based on pollution prevention agreements with local governments.

●Air pollutant emissions (unit: t)

*Aggregation targets: Hokkaido Refinery, Chiba Complex, Aichi Complex, Tokuyama Complex, TOA Oil Co., Showa Yokkaichi Sekiyu Co., Seibu Oil Co. and major consolidated companies
*Data for Seibu Oil Co. only includes emissions from June 2022, when the company became a consolidated company.

In offshore oil field development, water containing oil is generated during test drilling and development. To prevent marine pollution, the generated water is passed through a separator, and the oil is transported to shore for treatment.The water from which the oil has been removed is treated to meet wastewater standards before being returned to the sea. Additionally, before trial drilling and development, we always conduct an environmental and impact assessment by experts to confirm that the environmental impact is at an acceptable level. In the unlikely event that oil leaks into the ocean, we have prepared an ''oil spill prevention plan.'' In an emergency, we can take measures such as setting up an oil fence to prevent the spread and collecting the leaked oil. We will implement this as soon as possible.
In ocean-going tanker transport, we take both hard and soft measures to maintain zero oil spill accidents. On the hardware side, we are reducing the risk of oil spills by making all large tankers currently in operation double-hulled. On the soft side, we conduct regular disaster prevention drills onboard and provide safety and environmental education to all crew members.

In addition, our group aims to provide safe and stable energy and materials, and actively engages in environmental conservation activities such as solving the marine plastic waste problem, contributing to the creation of a sustainable society. Masu. Additionally, our group is participating in the Clean Ocean Materials Alliance (CLOMA), which aims to solve the ocean plastic problem.

At Refineries/Complexes, factories, service station, and other facilities that handle petroleum, there is a risk of soil contamination, such as oil leaks from underground pipes. For this reason, our group is working on voluntary investigations of soil and groundwater contamination and purification measures. In particular, when there is a change in the nature of the land, such as the closure or rebuilding of a facility, we work to properly manage the land and prevent contamination from occurring, such as by conducting soil contamination investigations again in accordance with the Soil Contamination Countermeasures Act.