Event Notification Report for May 05, 2026

AGREEMENT STATE REPORT - STOLEN GAUGE

The following information was provided by the California Department of Public Health, Radiation Health Branch (RHB) via email:

"On April 27, 2026, at approximately 0631 PDT, the radiation safety officer (RSO) from the licensee contacted RHB to report the theft of a moisture/density gauge, a CPN model MC-3 (S/N M31106358) with 0.370 GBq Cs-137 and 1.85 GBq Am-241/Be sources. The gauge had been in the back of an open bed pick-up parked in front of a room at a local hotel. The cables and locks were cut, and the gauge was removed from the truck bed. The authorized user, who left the radioactive gauge unmonitored while collecting the rest of his belongings from the room, discovered the missing radioactive gauge at approximately 0530 PDT on April 23, 2026. The authorized user notified the RSO and then notified the Monrovia Police Department to complete a theft report. A copy of the theft report will be forwarded to the RHB office. The RSO will contact local newspapers in Monrovia in an attempt to retrieve the stolen radioactive gauge, as well as notifying local servicing vendors of radioactive gauges to be alert for the serial number of the stolen gauge in case it turns up for service. The investigation will continue to determine if the radioactive gauge can be recovered."

California 5010 number: 042726

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf