PSM/RMP Threshold Checker
Compares a named chemical quantity against OSHA PSM (29 CFR 1910.119 Appendix A) and EPA RMP (40 CFR 68.130) listed thresholds. Threshold exceedance indicates the program may apply; applicability has additional conditions (process definition, exemptions) not evaluated here.
Reference only. Not legal or regulatory advice. Verify against the primary source before you act.
How it works
Two federal programs each keep a list of named chemicals with threshold quantities (TQs): OSHA's Process Safety Management standard (Appendix A) and EPA's Risk Management Program (40 CFR 68.130). This tool looks your chemical up on both lists and compares your on-site quantity to each TQ.
A chemical not found on either list is not the same as “no obligations apply” — double-check the primary text directly. Threshold exceedance itself only indicates a program may apply; applicability has further conditions (process definition, exemptions) this tool does not evaluate. Flammable-mixture aggregation (68.130 Table 4) is out of scope.
29 CFR 1910.119 Appendix A (verified against the primary text) — as of 2026-07-12. eCFR
40 CFR 68.130 (verified against the primary text) — as of 2026-07-12. eCFR
Worked example
3,000 lb of chlorine on site: PSM TQ is 1,500 lb ( 3000 > 1500 → OVER), RMP TQ is 2,500 lb (3000 > 2500 → OVER). Both programs may apply.
Sources
Process Safety Management of Highly Hazardous Chemicals, Appendix A
U.S. Occupational Safety and Health Administration, as of 2026-07-12
29 CFR 1910.119 Appendix A (verified against the primary text)
open the sourceList of regulated substances and thresholds for accidental release prevention
U.S. Environmental Protection Agency, as of 2026-07-12
40 CFR 68.130 (verified against the primary text)
open the source
Related tools
Data vintage
- Data: OSHA Process Safety Management highly hazardous chemicals, U.S. Occupational Safety and Health Administration 57 FR 7847, Mar 4 1992; 76 FR 80738, Dec 27 2011; 84 FR 15102-15104, Apr 15 2019, retrieved 2026-07-12, 137 entries.Appendix A is reproduced as published, including the regulation's own quirks: the "Nickel Carbonly" spelling, duplicate rows for several substances, and the malformed Propyl Nitrate CAS 627-3-4, which the tool discloses beside the threshold rather than silently correcting.
- Data: EPA Risk Management Program regulated substances, U.S. Environmental Protection Agency eCFR Title 40, current as of 2026-07-02 (section last amended 82 FR 4702, Jan 13 2017), retrieved 2026-07-12, 140 entries.140 entries = 77 regulated toxic substances (Table 1) and 63 regulated flammable substances (Table 3). Tables 2 and 4 are the same lists in CAS order and are not duplicated.
last updated 2026-07-12