The 222-S Laboratory is the primary on-site lab for analysis of highly radioactive samples in support of all Hanford projects.

Navarro-ATL, LLC (Navarro-ATL) has the sole responsibility to operate, manage and maintain the laboratory. Analyses are performed on a wide variety of air, liquid, soil, sludge and biological samples.

The Laboratory studies the physical and chemical characteristics of waste necessary to ensure safe storage and enable waste retrievals, provides data to support tank closure requirements, and supports the Vadose Zone Program, which tests for potential threats to groundwater.

Navarro-ATL is also committed to meeting the needs of the Direct-Feed Low-Activity Waste (DFLAW) mission. During DFLAW operations, the 222-S Laboratory staff will characterize tank waste to ensure it is suitable to be treated for vitrification -- immobilization in glass. In this glass form, the waste is stable and impervious to the environment, and its radioactivity will safely dissipate over hundreds to thousands of years.

Prior to and since successful contract transition on April 15, 2021, Navarro-ATL has been working to unite Analytical, Facility Maintenance, and Operations staff with common performance goals. Contract scope includes both analytical and facility operations with core functions of engineering, environmental safety and health, assurance systems, interface management, and business services.