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SONATRACH PETROLEUM CORPORATION

ONE PERFECT SOLUTION LIMITED

PETRO-CANADA ENERGY NORTH SEA LIMITED

WINGAS STORAGE UK LIMITED

CONOCOPHILLIPS (U.K.) ALPHA LIMITED

STATOIL (U.K.) LTD

ARCADIA PETROLEUM LTD

API SERVICES LIMITED

DSND SUBSEA LTD

VITOL SERVICES LIMITED

STAR SERVICE STATIONS LIMITED

SHELL INFORMATION TECHNOLOGY INTERNATIONAL LTD

ROWAN DRILLING (U K) LTD

BP P.L.C.

O M V TRADING SERVICES LTD

NORSK HYDRO (U.K.) LIMITED

CONOCOPHILLIPS HOLDINGS LTD

PREMIER OIL FAR EAST LTD

NORTHERN & SHELL SERVICES LTD

OMV (U.K.) LTD

PETROBRAS EUROPE LIMITED

CHEVRON EQUITY SERVICES LIMITED

THOMAS SILVEY,LIMITED

SINOCHEM INTERNATIONAL OIL (LONDON) CO; LIMITED

SHELL INTERNATIONAL TRADING AND SHIPPING COMPANY LIMITED

FORTUM ENERGY LTD

SHELL CAPITAL SERVICES LIMITED