An emergency response plan, or ERP, is the documented plan for how a facility detects, responds to, and recovers from an emergency such as a fire, explosion, or release of a highly hazardous chemical. It covers alarms and notification, evacuation and shelter-in-place, roles and responsibilities, coordination with outside responders, and the actions taken after the event. Good engineering would produce one regardless, but the ERP is first and foremost a regulatory requirement.
Two U.S. regulations drive it in process safety. OSHA’s process safety management standard requires an emergency planning and response element under 29 CFR 1910.119(n), which ties back to the facility emergency action plan and the HAZWOPER rule. EPA’s Risk Management Program requires an emergency response program under 40 CFR Part 68, Subpart E. In IEC 61511 terms the ERP is the last line of defense, the mitigation layer you fall back on after the safety instrumented systems and other protection layers have done what they can. We would rather never need it, but a credible ERP is part of a complete layer of protection picture.
Key Points
- Primarily a regulatory requirement under OSHA PSM and EPA RMP.
- Covers notification, evacuation, responder coordination, and recovery.
- Functions as a mitigation layer of protection, after the SIS and other safeguards have acted.
- Must be drilled and kept current, a plan nobody practices is not a real plan.
Example
A facility storing anhydrous ammonia maintains an ERP that defines the toxic-release alarm, the downwind evacuation zones, who calls the local fire department and the LEPC, and where employees muster. It leans on ERPG values to set the exposure thresholds that trigger each response action.
Cited Sources
- OSHA 29 CFR 1910.119(n) — Emergency planning and response.
- EPA Risk Management Program, 40 CFR Part 68, Subpart E — Emergency Response Program.