ENS Event | |
|---|---|
07:00 Oct 21, 2025 | |
| Title | |
| Event Description | The following is a summary of information provided by the California Department of Public Health, Radiologic Health Branch (the Department) via phone and email:
On October 21, 2025, the radiation safety officer (RSO) of TGR Geotechnical, Inc reported to the Department that a moisture density gauge was stolen from the transport vehicle prior to heading to a worksite in the Los Angeles area. Upon arrival at home, the operator parked the vehicle in their driveway, removed the gauge from the transport case to charge the gauge in the vehicle, and then went inside to have breakfast. Approximately 30 minutes later, the operator found the door of the vehicle open, and the gauge missing. The gauge was a Troxler model 3430 (S/N 34794, 9 mCi Cs-137, 44 mCi Am-241/Be). The RSO had confirmed the gauge trigger lock was secured. The licensee is still investigating the incident. The Department will continue to investigate the incident. CA incident number: 5010-102125 The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: Huntington Park Police Department was notified. 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 |
| Where | |
|---|---|
| Tgr Geotechnical, Inc Huntington Park, California (NRC Region 4) | |
| License number: | 7196-30 |
| Organization: | California Radiation Control Prgm |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+32.3 h1.346 days <br />0.192 weeks <br />0.0442 months <br />) | |
| Opened: | Donald Oesterle 15:18 Oct 22, 2025 |
| NRC Officer: | Josue Ramirez |
| Last Updated: | Oct 22, 2025 |
| 57999 - NRC Website | |
Tgr Geotechnical, Inc with Agreement State | |
WEEKMONTHYEARENS 579992025-10-21T07:00:00021 October 2025 07:00:00
[Table view]Agreement State Stolen Gauge ENS 474172011-11-04T23:30:0004 November 2011 23:30:00 Agreement State Agreement State Report - Theft of a Moisture Density Gauge 2025-10-21T07:00:00 | |