Alyeska Pipeline Services Co
Agrium KPO
Air Products & Chemicals
Akzo Nobel Chemicals Inc
Amoco Petroleum Co
Ashland Petroleum Co
BDM Petroleum Technologies
BP American Production
BP Amoco
British Petroleum Corp
Burlington Resources Oil & Gas
Chevron Chemical Co
Chevron Phillips Chemical Co
Chevron Products Company
Chevron Research & Technology Co
Citgo Petroleum Co
Clark Refining Co
Coastal Petroleum Co
Coffeeville Resources Refining & Marketing Co
Cumberland Farms Inc
Dow Chemical Co
DuPont Chemcial Co
El Paso Energy Co
Elf Atochem
Equilon Enterprises LLC
Exxon Company USA
ExxonMobil Corp
ExxonMobil de Colombia SA
Flint Hills Resources Alaska
H & N Chemical

Hovensa LLC (Virgin Islands)
IE DuPont de Nemours & Co
Imperial Oil Ltd (Canada)
Imperial Oil Resources
Kerr-McGee Chemcial Co
Marathon Ashland Pipeline Co
Mobil Oil Co
Natural Gas Pipeline Co
Nexen Inc (Canada)
Olin Corp
Oxford Farms
Peoples Gas System Inc
Petro Chem Environmental Systems
Phillips Petroleum Co
Plantation Pipeline Co
Rice Operating Co
Shell Development Co
Shell Global Solutions
Shell Martinez Refining Co
Shell Oil Products Co
Southern Petroleum Labs
Sunoco
Taminco
Tesoro Hawaii Corp
Texaco
Ultramar Diamond Shamrock Corp
Union Carbide
Valero Energy Corp
Williams Gas Pipelines - Transco
XTO Energy