A subsidiary of Deep Isolation, Freestone Environmental Services, Inc. is a multi-discipline environmental and water resources consulting firm headquartered in Richland, Washington. Their team includes experienced scientists and engineers with a wide variety of expertise providing services to public and private sector clients.

Freestone provides specialized siting evaluations to support the development of deep borehole geologic disposal facilities. They assist clients in the nuclear, energy, and government sectors with identifying and screening locations that meet stringent technical and regulatory criteria for long-term isolation of materials.