The California Accidental Release Prevention Program (Cal ARP) requires any business that handles more than threshold quantities of an extremely hazardous substance per California regulations to develop a Risk Management Plan (RMP). The RMP is implemented by the business to prevent or mitigate releases of regulated substances that could have off-site consequences through hazard identification, planning, source reduction, maintenance, training, and engineering controls.

Authority: 

California Code of Regulations:  Title 19, Division 2, Chapter 4 (Area Plan) and 4.5 (Cal ARP)

Forms/References:

Cal ARP Registration form
Cal ARP List of Extremely Hazardous Substance - Table 3

Links:

California Environmental Reporting System (CERS)
California Governor's Office of Emergency Services (Cal OES)
Cal OES Cal ARP Program FAQ
U.S. Environmental Protection Agency
California Code of Regulations