Does your facility handle any of OSHA's listed highly hazardous chemicals?
OSHA's Appendix A lists 137 chemicals with threshold quantities (TQs). If any single process at your facility contains a listed chemical at or above its TQ, PSM coverage is triggered. Search your chemical below:
| Chemical Name | CAS Number | Threshold Quantity (lbs) |
|---|
Does your facility use flammable liquids or gases in large quantities?
Even if your chemicals aren't on Appendix A, PSM applies if a single process contains 10,000 lbs or more of a flammable liquid (flash point below 100°F / 37.8°C) or any flammable gas. This covers many petroleum refining and petrochemical processes.
Enter an estimated quantity to check against the 10,000 lb threshold (optional):
Does your facility qualify for any PSM exclusions?
Even if you handle Appendix A chemicals or large quantities of flammables, certain facility types and situations are excluded from PSM. Check any that apply to your facility:
Note: Exclusions are narrowly defined. If you're unsure whether your facility qualifies, consult a PSM professional — misidentifying an exclusion is a common compliance mistake.
What If I'm Covered?
You must implement a full PSM program covering all 14 elements. The first step is usually compiling Process Safety Information (PSI) and scheduling a Process Hazard Analysis (PHA).
See all 14 elements →Check EPA's RMP Rule Too
Many facilities covered by PSM also fall under EPA's Risk Management Program (40 CFR Part 68). The thresholds and chemicals differ slightly — check both standards if you handle highly hazardous chemicals.
RMP overview in Glossary →