Occidental's environmental remediation liabilities for closed or non-operated sites, including former chemical plants in California, New York, Ohio, Washington, and a closed coal mine in Pennsylvania, vary depending on factors such as acquisitions or divestitures, site acquisitions, and remedy selection and implementation. Currently, Occidental incurs environmental remediation costs of 28 million, 36 million, and 112 million for the years ended December 31 2020 and 2019 respectively, with the remainder over the next 10 years.