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The following report is a summary of the information received via phone call: On 10/6/19, the radiation safety officer (RSO) noticed that one of the company vehicles appeared to have been broken into and the windows were smashed. The RSO conducted an inventory of the density gauges and determined that one of them was missing. The RSO then contacted local law enforcement (LLEA) and reported the incident. LLEA arrived on site at approximately 1640 EDT to obtain the incident information. The incident is still under investigation. The gauge information is as follows: Manufacturer: Humboldt Model: 5001 Serial Number: 2529 Source Quantity/Activity: Am-241/Be - 50 milliCuries Cs-137 - 10 milliCuries.

• * * UPDATED ON 10/7/19 AT 1404 EDT FROM CHRIS GENDUSO TO KERBY SCALES * * *

The Pavement Inspection Technologies RSO reported that the gauge was recovered intact. Notified R1DO (Dentel), ILTAB and NMSS Events (email). 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