A licensee, Hazen Research, Inc.,
Colorado license # 77-02, notified the [Colorado Department of Health] that 4 generally licensed
Tritium exit signs were accidentally disposed of in the sanitary landfill during a building repair project. Apparently, an electrical contractor disposed of the
exit signs in a dumpster after they were removed and replaced with new signs in February or March of this year. The error was discovered on April 6. The signs,
Isolite Model: 2040-50G-10BK, were purchased in May of 2001, and contained about 7.5 Ci of
Tritium each.
No other details are available at this time.
The [Colorado Department of Health] has initiated an investigation of this incident.
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.