Navy finds massive cache of deadly radiological material including uranium hidden in California | 17 June 2026 | Government officials found a cache of radiological materials at a San Francisco shipyard that was allegedly stashed there by a former employee of a US Navy subcontractor. The Navy and the subcontractor said the suspect is an employee of RSI Entech, which was hired by the military to remediate the area. Around 200 radiological items — including samples of uranium and thorium — were found in a locked cabinet within a large complex called Building 400A in Hunters Point in April. The items also included liquid scintillators, a specialized laboratory instrument used for radiological analysis. Most of the items were radioactive isotopes known as “check sources” that are used to calibrate devices like a Geiger counter. Jeff Bale, director of operations at RSI Entech, said the materials were stored there by a “rogue” employee.