On October 6, 2019, an employee for the Alliance for Sustainable Energy (the Alliance) discovered a sulfuric acid spill in the Science and Technology Facility (S&TF) at the National Renewable Energy Laboratory (NREL) in Golden Colorado. The Board’s responsibilities have been completed with respect to this investigation. The analysis and the identification of the contributing causes, the root cause, and the Judgments of Need resulting from this investigation were performed in accordance with the Department of Energy Order 225.1B, Accident Investigations, dated March 4, 2011.