Americas

Company

REPSOL ENERGY CANADA
2001 Timberloch P.L. - Suite 300
Houston, Texas
United-States

CHEVRON GLOBAL GAS
1400 Louisiana - Suite 13152                                          Houston, TX 77002
United-States

ARGENTINA

Y.P.F. S.A.
Macacha Güemes 515, 24th Floor
1106 Capital Federal
Buenos Aires                                                                   Argentina