Preston A. Peak

Furmanite Corp. provides specialized technical services, including online services, such as leak sealing, hot tapping, line stopping, line isolation, composite repair, valve testing and certain non-destructive testing and inspection. The firm provides off-line services, including onsite machining, heat treatment, bolting, valve repair and other non-destructive testing and inspection services and other services, including smart shim services, concrete repair, engineering services, and valve and other products and manufacturing. Its services and products are provided primarily to electric power generating plants, petroleum industry, which includes refineries and off-shore drilling rigs, including subsea, chemical plants and other process industries. The company was founded in 1924 and is headquartered in Houston, TX.

NuStar Pipeline Partners LP provides petroleum transportation services. Its 2,090-mile east pipeline has product terminals and product tanks with a capacity of 3.5 million barrels. The company is headquartered in Richardson, TX.

Kaneb Services LLC provides marketing, terminaling and transportation of petroleum products. The company was founded on April 2, 2001 and is headquartered in Richardson, TX.

Part of Dorchester Minerals LP, Dorchester Hugoton Ltd. is a company that explores for and produces natural gas. The company is based in Garland, TX. Peak. The company was founded by Preston A. Dorchester Hugoton was acquired by Spinnaker Royalty Co. LP on August 02, 2001.

Part of Dorchester Minerals LP, Dorchester Minerals Management GP LLC provides management services. The company is based in Dallas, TX. William Casey McManemin has been the CEO of the company since 2001.