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Air Products & Chemicals
Air Liquide
Alon USA, LP.
Amarada Hess Corporation
American Chrome & Chemical
BP Petrochemicals
BP Refining & Marketing
Baroid Drilling Fluids, Inc.
Big Three Industries
Chemical Waste Management
Citgo Petroleum Corporation
ChevronTexaco
ConocoPhillips
Crown Central Petroleum
Degussa Carbon Black Corp.
Eastman Chemical Company
E. I. Du Pont De Nemours
Elementis Chromium
Equilon Enterprises LLC
Equistar Chemicals, LP
Ergon Refining Inc.
ExxonMobil Chemical
Company
Farmland Industries, Inc.
Fina Oil and Chemical Co.
Flint Hills Resources
Formosa Plastics Corporation
Frontier Refining, Inc.
Giant Refining Company
GNI Group, Inc.
Hoechst Celanese Corporation
Holly Corporation
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