EXHIBIT A

Directors and Executive Officers of Valero Energy Corporation

Name	Principal Occupation	Citizenship
Joseph W. Gorder	Chairman of the Board, President and Chief Executive Officer	United States
Jerry D. Choate	Director	United States
Deborah P. Majoras	Director	United States
Donald L. Nickles	Director	United States
Philip J. Pfeifer	Director	United States
Robert A. Profusek	Director	United States
Susan Kaufman Purcell	Director	United States
Stephen M. Waters	Director	United States
Randall J. Weisenburger	Director	United States
Rayford Wilkins Jr.	Director	United States
Jay D. Browning	Executive Vice President and General Counsel	United States
Michael S. Ciskowski	Executive Vice President and Chief Financial Officer	United States
Mike Crownover	Executive Vice President and Chief Administrative Officer	United States
R. Lane Riggs	Executive Vice President-Refining Operations and Engineering	United States

Directors and Executive Officers of Valero Terminaling and Distribution Company

Name	Principal Occupation	Citizenship
Joseph W. Gorder	Chief Executive Officer, President and Director	United States
Jay D. Browning	Executive Vice President and General Counsel	United States
Michael S. Ciskowski	Executive Vice President and Chief Financial Officer	United States
R. Michael Crownover	Executive Vice President	United States
R. Lane Riggs	Executive Vice President	United States