OSHA and EPA Lists of Highly Hazardous Substances and Threshold Quantities (TQ) for Accident Release Prevention

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