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Alon Asphalt
Asphalt Materials, Inc.
Associated Asphalt
Axeon
Calumet Specialty
Ergon
Flint Hill Resources
Holly Frontier
Hunt Refining
Idaho Asphalt Supply
Jebro Inc.
Lion Oil
Marathon Petroleum
Mathy Construction
Owens Corning
Phillips 66
San Joaquin Refining
Seneca Petroleum
Suit-Kote
United Refining
U.S. Oil
Valero
World Oil
Wright Asphalt