W. Christopher Chisholm

Basin Water, Inc. designs, builds and implements systems for the treatment of contaminated groundwater. It develops a proprietary, scalable ion-exchange wellhead treatment system that reduces groundwater contaminant levels. The company was founded in 1999 and is headquartered in Ranco Cucamonga, CA.

USFilter Corp. was manufacturing wastewater-treatment equipment in the US and worldwide. The company was providing services to municipal, industrial and institutional clients through its Water and Wastewater Systems, Water Services and Products groups. Siemens acquired the company in 2004. USFilter was located in Warrendale, PA.

Part of GAP Capital LLC, Mobley Environmental Services, Inc. is a company that provides hazardous waste management services. The company is based in Kilgore, TX.

Envirogen Technologies, Inc. engages in the provision of environmental technology and process solutions. The firm specializes in air treatment, water treatment, materials recovery, and process improvement. Its products include biological treatment, filtration, absorption, disinfection, ion exchange systems and water softeners, and physical chemical process. The company is headquartered in Kingwood, TX.

Veolia Water North America Operating Services, Inc. provides comprehensive water and wastewater services for local, federal governments, business and industries. It offers water distribution, wastewater collection, groundwater remediation systems, water, combined sewer overflow, residual, composting and wastewater treatment facilities. The company was founded in 1972 and is headquartered in Chicago, IL.

Nuverra Environmental Solutions, Inc. engages in the development and ongoing production of oil and natural gas from shale formations. It operates through the following segments: Rocky Mountain, Northeast, Southern, and Corporate and Other. The Rocky Mountain segment includes the Bakken shale area. The Northeast segment is comprised of the Marcellus and Utica shale areas. The Southern segment covers the Haynesville shale area. The Corporate and Other segment includes certain corporate costs and certain other corporate assets. The company was founded on May 29, 2007 and is headquartered in Houston, TX.

Underground Solutions, Inc. is an infrastructure technology and pipeline rehabilitation company. It provides infrastructure technologies for water, sewer and conduit applications. The company was founded is headquartered in Poway, CA.