Occidental's environmental remediation liabilities vary depending on the identification of new sites, acquisitions or divestitures, and the selection of remedies and remedy implementation. For example, Occidental had environmental remediation liabilities of 28 million and 112 million for the years ended December 31 2020 and 2019 respectively, with 75 of these liabilities being former chemical plants in California, Delaware, Michigan, New York, Ohio, Washington, and Washington, and the closed coal mine in Pennsylvania.