ALON USA
Asphalt Materials, Inc.
Asphalt Refining & Technology Company, LLC
Associated Asphalt, Inc.
Calumet Specialty Products, L.P.
ConocoPhillips
Ergon Asphalt & Emulsions, Inc.
Flint Hills Resources, LP
HollyFrontier Refining & Marketing, LLC
Hunt Refining Company
Idaho Asphalt Supply, Inc.
Jebro Inc.
Lion Oil Company
Lunday-Thagard Refining
Marathon Petroleum Company LP
Mathy Construction Company
NuStar Marketing, LLC
Paramount Petroleum Corporation
San Joaquin Refining Co., Inc.
Seneca Petroleum Company
Suit-Kote Corporation
Owens Corning Roofing and Asphalt LLC
United Refining Company
U.S. Oil Trading LLC
Valero Energy Corporation
Wright Asphalt Products Company LLC