Overview
- An air filter sample collected during asphalt grinding at Parcel C in November 2024 detected Pu‑239 at roughly twice the established action level, according to the city’s health officer.
- San Francisco officials say the Navy did not inform the Health Department until October 2025, a delay the city called unacceptable and contrary to required immediate notification.
- The Navy agreed to meet with the Health Department and says the information it will share indicates no threat to human health or the environment, while the city seeks a full year of air‑monitoring data for independent review.
- Supervisor Shamann Walton plans to pursue a formal hearing to examine the delayed disclosure and any potential risks to nearby residents, workers, and artists.
- Parcel C remains closed to the public and under cleanup next to the redeveloped Parcel A, and the site’s history of radioactive findings and past contractor misconduct has intensified demands for transparency and oversight.