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Appendix A OSHA and EPA Lists of Highly Hazardous Substances and Threshold Quantities (TQ) for Accidental Release Prevention
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Process Safety Management for Highly Hazardous Chemicals - index
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All concentrations given in the table are by weight percent cont'd - doe-hdbk-1101-20040138


DOE-HDBK-1101-2004
OSHA and EPA Lists of Highly Hazardous Substances and Threshold Quantities (TQ) for
Accident Release Prevention
The following table provides a side by side comparison of TQ's of regulated substances
in the OSHA Process Safety Management Program (29 CFR 1910.119) and the EPA Risk
Management Program (RMP) (40 CFR 68). The purpose of this appendix is to provide an
integrated alphabetic listing of covered chemicals to assist DOE contractors in the determination
of the applicability of the PSM and RMP requirements.
The EPA list incorporates both toxic and flammable substance lists. The OSHA listing is
primarily from the "List of Highly Hazardous Chemicals, Toxics and Reactivities In Appendix A
of the PSM rule. Because this includes EPA-listed flammable chemicals, OSHA's generic
inclusion of flammable liquids and gases is applicable and is noted. No attempt has been made
to try to provide a comprehensive listing of all flammable gases and liquids meeting the OSHA
criteria found in 29 CFR 1910.1200(c). For explosives, this table compares the TQs and sources
for explosive listing criteria. Certain chemicals were required to be on the EPA list by the 1990
Clear Air Act Amendments. Such chemicals are identified on this listing where applicable.
All concentrations given in the table are by weight percent.
EPA RMP TQ (lbs)
CAS No.
Chemical Name
OSHA PSM TQ (lbs)
Toxic & Flammables
Appendix A
Tables (40 CFR 68.130)
(29 CFR 1910.119)
Acetaldehyde
75-07-0
2500
10,000
10,000
74-86-2
Acetylene
10,000
107-02-8
Acrolein [2-Propenal]
150
5000
107-13-1
Acrylonitrile [2-Propenenitrile]
20,000
814-68-6
Acrylyl chloride [2-Propenoyl chloride]
250
5000
Varies
Alkylaluminums
5000
107-18-61
Allyl alcohol [2-Propen-1-o1]
15,000
107-05-1
Allyl chloride
1000
107-11-9
Allylamine [2-Propen-1-amine]
1000
10,000
Required to be on EPA's list by the 1990 Clean Air Act Amendments.
On the EPA list of regulated flammable substances.
The applicable OSHA TQ though not specifically listed in the PSM Rule.
A-1


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