Dr. Timothy Taulbee will discuss personnel monitoring lessons learned from a dose reconstruction and radiation compensation perspective. Personnel monitoring has changed many times through the history of radiation monitoring. Some changes have been good, such as monitoring workers via a personal dosimeter, while other changes (decreases in personnel monitoring in favor of area, group or co-worker monitoring) have led to challenges from a dose reconstruction perspective. The scaling back of bioassay monitoring has also led to challenges especially when a worker presents with a reported injury (cancer) and the job of the Health Physicist is to reconstruct the worker’s dose. Was the worker exposed to radiation? Was the dose less than monitoring requirements? How do you prove or demonstrate this? When personnel monitoring data is not available, alternate radiation monitoring data becomes critical. This presentation will discuss the availability of alternate monitoring data and potential limitations of some monitoring data.