SCBA_Face_PieceDuring the Brunacini Hazard Zone Management (Blue Card) Conference Tim Merinar and Steve Miles of the National Institute of Occupational  Safety & Health (NIOSH) did a presentation on investigations involving firefighter fatalities relating to thermal degradation of self-contained breathing apparatus (SCBA) face piece lenses. They conducted a review of seven recent fatalities in five separate events where SCBA face pieces may have been thermally degraded while they were still "air on".  This was identified by a review of autopsies and medical examiner reports, radio transmissions, examination of personal protective equipment (PPE) and witness reports.