1. US Department of Labor, Occupational Safety and Health Administration (OSHA), Federal Regulation 29 CFR 1910.119, Process safety management of highly hazardous chemicals, explosives, and blasting agents; Final Rule, 24 February, 1992.
2. ANSI/ISA-S84.01-1996, Application of Safety Instrumented Systems for the Process Industries, Instrument Society of America S84.01 Standard, Research Triangle Park, NC, 27709, February 1996.
3. ISA-S91.01-1995, Identification of Emergency Shutdown Systems and Controls That Are Critical to Maintaining Safety in Process Industries, Instrument Society of America S91.01 Standard, Research Triangle Park, NC, 27709, May 1995.
4. Donald J. Leonard, Consultant, personal communication.
5. Guidelines for Safe Automation of Chemical Processes, Center for Chemical Process Safety, American Institute of Chemical Engineers, New York, 1993.