In offshore oil development operations, effluent water containing oil is generated during test drilling and development. To prevent sea pollution, the generated water is treated using a separator and the oil is transported to land-based facilities for processing and the oil-free water is returned to the sea after being treated to meet effluent water standards. In addition, we always consult an expert to conduct an environmental impact assessment prior to test drilling and development to ensure that the impact is at an acceptable level. In case of a marine oil spillage, we promptly deploy an oil containment boom to restrict its spread and recover the spilled oil in accordance with our “Oil Pollution Contingency Plan."
During transport by ocean-going tankers, we take measures from aspects of both equipment and personnel to maintain a record of zero oil spillage. In the area of equipment, each of our very large crude carriers (VLCC) in operation is double hulled (to prevent oil spillage due to a minor damage), thereby reducing the risk of oil spills. In terms of personnel, we provide regular training, including onboard emergency response drills and safety and environmental education, for all crew members.
In addition, we will aim to provide safe and stable energy and materials, and will contribute to the creation of a sustainable society by proactively engaging in environmental protection activities, including solving the problem of marine plastics waste. In September 2019, Idemitsu Group joined the "Clean Ocean Material Alliance (CLOMA)" which aims to solve the problem of marine plastics waste.