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

DOE-HDBK-1101-96

OSHA and EPA Lists of Highly Hazardous Substances

and Threshold Quantities (TQ) for Accidental Release Prevention

The following table provides a side-by-side comparison of TQs of regulated substances under

the OSHA Process Safety Management Program (29 CFR 1910.119) and the EPA Risk Manage-

ment Program (RMP) (40 CFR 68). The purpose of this appendix is to provide an integrated alpha-

betic 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 Reactives" in Appendix A of

the PSM Rule. Because this list includes EPA-listed flammable chemicals, OSHA's generic inclu-

sion 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.

OSHA PSM TQ (lbs)

EPA RMP TQ (lbs)

CAS No.

Chemical Name

Appendix A

Toxics & Flammables

(29 CFR 1919.119)

Tables (40 CFR 68.130)

Acetaldehyde∞

75-07-0

2500

10,000

Acetylene∞

74-86-2

10,000†

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

107-18-6

Allyl alcohol [2-Propen-1-ol]

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