Chemical Security: Overlapping Programs Could Better Collaborate to Share Information and Identify Potential Security Gaps, Report to Congressional Requesters [open pdf - 3MB]
From the Highlights: "Facilities with hazardous chemicals could be targeted by terrorists to inflict mass casualties or damage. Federal regulations applicable to chemical safety and security have evolved over time as authorizing statutes and regulations established programs for different purposes, such as safety versus security, and with different enforcement authorities. GAO [Government Accountability Office] has reported that such programs may be able to achieve greater efficiency where overlap exists by reducing duplication and better managing fragmentation."
Government Accountability Office: http://www.gao.gov/