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As a result of the Navy’s identification of sampling issues by Tetra Tech EC (TtEC) in 2012, the Navy conducted a thorough data evaluation of radiological samples collected by TtEC. After reviewing more than 900,000 analytical results, the Navy found questionable laboratory data and practices, along with evidence of potential data falsification. The Navy concluded that the data collected by this contractor was not reliable and began plans for retesting.

Independent Oversight and Review

To ensure the integrity of data collection, data analysis, and removal of any potential remaining contamination, the Navy has hired contractors to monitor work to ensure proper sampling methods are followed, and to verify legitimacy of the results. Independent radiological experts will review sampling plans, results, and reports. The new data collected by the Navy will be analyzed at approved off-site laboratories to determine if it meets cleanup objectives defined in each parcel’s ROD.  In addition, federal and state regulatory agencies including the United States Environmental Protection Agency (USEPA), California Department of Toxic Substances Control (DTSC), and the California Department of Public Health will have the opportunity to conduct independent sampling to confirm the Navy’s results.

Radiological Related Links

Radiological Retesting Documents
Documents relating to radiological sampling conducted by Tetra Tech EC (TtEC) at Parcels B, C, E, D-2, G, UC-1, UC-2, and UC-3 may be found on the Documents page of this website.

Radiological Meeting Materials 
Materials from Navy presentations are available for review and download on the Meeting Materials Webpage. 

Timely Topics
The Navy has developed a list of relevant topics for members of the community and the media to better understand radiological cleanup efforts at the former shipyard. All information can be found on the Timely Topics Webpage.

Get Involved
The Navy has an extensive outreach program to communicate program updates and information to community members, provide opportunities for participation in public review of Navy documents, and encourage public participation in Navy meetings and events. Learn more about how you can get involved. All information can be found on the Contact page of this website.
Essential information about public safety during radiological cleanup at the former Hunters Point Naval Shipyard.
Provides a summary of actions (site fieldwork) that will restest Parcel G for radiological contamination at the former Hunters Point Naval Shipyard. The Navy expects to finalize the Work Plan by the end of October 2018.
Describes how the Historical Radiological Assessment (HRA) was completed for Hunters Point.

Radiological Related Presentation

Hunters Point Radiological Cleanup and Public Safety

Based on the historical operations at HPNS, radiological cleanup is required prior to transfer of the former shipyard to the City of San Francisco. The Navy's first priority throughout this process is public health and safety. This video explains how the Navy is conducting the cleanup while ensuring continued public safety.
RAD Data Evaluation Presentation Thumbnail

RAD Data Evaluation Process PowerPoint Presentation

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