Mark C Rohr

Mark C. Rohr; age 56; director since 2001; President and Chief Executive Officer since October 1, 2002, having previously served as our President and Chief Operating Officer from January 1, 2000 through September 30, 2002, and our Executive Vice President from March 22, 1999 through December 31, 1999, and Senior Vice President, Specialty Chemicals, of Occidental Chemical Corporation (chemical manufacturer with interests in basic chemicals, vinyls, petrochemicals and specialty products and a subsidiary of Occidental Petroleum Corporation) prior thereto. Other directorships: Celanese Corporation (industrial chemicals producer).