Occidental's environmental remediation liabilities for closed or non-operated sites included 75 liabilities, including former chemical plants in California, New York, Ohio, Washington, and a closed coal mine in Pennsylvania. These liabilities vary depending on factors such as acquisitions or divestitures, the identification of additional sites, and the selection of remedies and implementation. Occidental's environmental remediation costs for the years ended December 31 2020 and 2019 are estimated to be around 28 million, 36 million, and 112 million, respectively, based on current estimates, based on the remaining residual ten years.