Enclosed are the Office of Inspector General’s (OIG’s) three fiscal year 2015 management challenges and one internal control weakness for consideration as part of the U.S. Chemical Safety and Hazard Investigation Board (CSB) Federal Managers’ Financial Integrity Act review. The Reports Consolidation Act of 2000 requires our office to report what we consider the most serious management and performance challenges facing CSB. We used to audit and investigative work, public hearings, CSB board meetings, and additional analysis of CSB operations to arrive at the issues presented. We previously provided you a draft of this documentation, and we considered your comments in finalizing these management challenges and the internal control weakness.