HOUSTON — Occidental Petroleum Corp.’s board of directors has approved a CEO succession plan and promoted Vicki A. Hollub to senior executive vice president of Occidental and president — Oxy Oil and Gas. She will be responsible for operations in the U.S., Middle East region and Latin America. The board plans for Hollub to succeed Stephen I. Chazen as CEO of Occidental after a thorough transition period. For more information, visit www.oxy.com or call (713) 215-7000.