Item 4. Controls and Procedures

Occidental's President and Chief Executive Officer and its Senior Vice President and Chief Financial Officer supervised and participated in Occidental's evaluation of the effectiveness of its disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this report. Based upon that evaluation, Occidental's President and Chief Executive Officer and Senior Vice President and Chief Financial Officer concluded that Occidental's disclosure controls and procedures were effective as of March 31, 2022.

During the three months ended March 31, 2022, Occidental converted its legacy Anadarko's information into Occidental's primary enterprise resource planning system. Certain existing internal controls were modified and new controls were implemented. This conversion affected Occidental's internal control over financial reporting. There has been no change in Occidental’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the first quarter of 2022 that has materially affected, or is reasonably likely to materially affect, Occidental’s internal control over financial reporting other than the system conversion.

Part II Other Information

Item 1. Legal Proceedings

Occidental has elected to use a $1 million threshold for disclosing certain proceedings arising under federal, state or local environmental laws when a governmental authority is a party. Occidental believes proceedings under this threshold are not material to Occidental's business and financial condition. Applying this threshold, there are no such proceedings to disclose for the quarter ended March 31, 2022. For information regarding other legal proceedings, see Note - 10 Lawsuits, Claims, Commitments and Contingencies in the Notes to Consolidated Condensed Financial Statements in Part I, Item 1 of this Form 10-Q.