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The following information was received via email: Subject: Event Report Number WA-07-084 This is notification of an event in Washington State as reported to or investigated by the WA Department of Health, Office of Radiation Protection. STATUS: new Licensee: Washington State Department of Transportation Eastern Region City and State: Spokane, Washington License Number: WN-L035-1 Type of License: Portable Gauge Licensee Date of Event: 28 September 2007 Location of Event: Spokane, Washington

ABSTRACT: (where, when, how, why; cause, contributing factors, corrective actions, consequences, Dept. of Health (DOH) on-site investigation; media attention): The licensee's radiation safety officer notified Washington Department of Health (DOH) on 01 October 2007 their Troxler portable gauge, model 3430, serial number 36039 (containing maximum of 8 millicuries Cs-137 and 40 millicuries Am-241:Be) was run over on 28 September 2007 by a small roller during road repair. The gauge did not have the probe extended when struck. The gauge user immediately notified their radiation safety officer and the RSO's supervisor; radiation surveys detected no elevated radiation levels, so the licensee decided to transport the device to their storage area and inform Washington DOH the following workday, Monday 01 October 2007. It was reported that only superficial damage was done to the plastic case of the gauge. The gauge was put back in the transport case and sent back to its secured storage location. Department staff are investigating. Washington (DOH) on-site investigation underway. No known media attention. Notification Reporting Criteria: Per WAC 246-221-250 (2) (d) ~ Twenty-four (24) hour notice required for equipment failure or inability to function as designed. Isotope and Activity involved: one Troxler model 3430, serial 36039 portable gauge, containing two radioactive sealed sources, one 8 millicuries Cs-137 maximum, & one 40 millicuries Am-241:Be maximum. Overexposures? (number of workers/members of the public; dose estimate; body part receiving dose; consequence): Unknown but most likely not. The unit was functioning properly on 28 September 2007. Dose rate measurements by the licensee after the gauge was rolled over detected no elevated radiation fields.

Lost, Stolen or Damaged? (mfg., model, serial number): one Troxler model 3430, serial 36039 portable gauge, containing two radioactive sealed sources, one 8 millicuries Cs-137 maximum, & one 40 millicuries Am-241:Be maximum.

Disposition/recovery: NA Leak test? Most recent leak test was collected on 18 January 2007 (no contamination, < 0.000002 microcuries).

Vehicle: (description; placards; Shipper; package type; Pkg. ID number) NA Release of activity? NA Activity and pharmaceutical compound intended: NA Device (HDR, etc.) Mfg., Model; computer program: NA Exposure (intended/actual); consequences: NA Was patient or responsible relative notified? NA Was written report provided? NA Was referring physician notified? NA Consultant used? No.