This letter refers to the Department of Energy (DOE) investigation into the facts and circumstances associated with the fume hood fire that occurred in building
TRA-668 at the Reactor Technology Complex on June 12, 2007, and the electrical shock of two firefighters responding to a wildland fire at the Idaho National
Laboratoryon July 14, 2007. The results of our investigation were discussed with you and members of your staff on November 8, 2007, the final day of the
onsite portion of our investigation, and provided to you in an lnvestigation Report dated December 5, 2007.