Overview
- An air filter sample taken at Parcel C in November 2024 detected plutonium-239 at about twice the action level during field work that included asphalt grinding.
- San Francisco’s health officer alerted community groups on Oct. 30 and formally requested all incident details plus a year of air-monitoring records for outside review.
- District 10 Supervisor Shamann Walton said he will seek a formal hearing to examine the Navy’s delayed disclosure and potential risks to residents, workers, and artists.
- The Navy agreed to meet city officials on Friday and says its compiled information indicates no threat to human health or the environment, with more details promised after the briefing.
- The detection intensifies scrutiny of the shipyard’s cleanup near occupied Parcel A, following years of legacy contamination, prior data falsification findings, and recent radioactive object discoveries.