Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Risk Management Program (RMP) Rule

Worst-case release scenarios for toxics and flammables represented by Program 2 or 3 processes

A stationary source subject to the risk management program regulations at 40 CFR Part 68 comprises multiple Program 2 and Program 3 covered processes. The owner or operator must do a single worst-case release analysis to represent toxic regulated substances and a single worst-case release analysis to represent flammable regulated substances (40 CFR §68.25(a)(2)). Could the worst-case scenario for a toxic substance involve a Program 2 process while the worst-case scenario for a flammable substance involves a Program 3 process, and vice versa?

Yes. For the purpose of the hazard assessment requirements of 40 CFR Part 68, Subpart B, no distinction is made between Program 2 and Program 3 processes. The worst-case release scenario for toxic substances can be represented by either a Program 2 or a Program 3 process, and the worst-case release scenario for flammable substances can also be represented by either a Program 2 or a Program 3 process.

Risk Management Program (RMP) Rule

  • About RMP
    • Publications
    • Training Resources
    • Frequent Questions
  • Guidance and Fact Sheets
    • Guidance for Facilities
    • Guidance for Implementing Agencies
    • Guidance for Inspections
  • Submitting an RMP
    • RMP*Comp
    • RMP*eSubmit
      • RMP*eSubmit User's Manual
    • Resubmit, Correct or Withdraw
  • Accessing RMP Information
    • Federal Reading Rooms
    • Vulnerable Zone Indicator System
  • General Duty Clause
Contact Us about the Risk Management Program Rule
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 6, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.

Environmental Protection Agency logo
www.epa.gov Feedback Survey

Welcome! Please share your feedback on how we can make www.epa.gov work better for you.

A red asterisk (*) indicates a required field.

Success

Thank you. Your feedback has been received.

Error

alert message

Required Questions - page 1 of 2
question_55203_answer_01
*

400 characters allowed
Would you like to take two more minutes to answer more questions to help us improve our services?
Yes, keep going →
← Back
Optional questions - page 2 of 2
How would you describe yourself?
400 characters allowed
400 characters allowed
400 characters allowed
U.S. flag

An official form of the United States government. Provided by Touchpoints
OMB Approval #1090-0008 · Expiration Date 11/30/2027