Standard Interpretations - Table of Contents Standard Interpretations - Table of Contents
• Standard Number: 1910.119

March 31, 1994

Ms. Doris S. Reid, Manager
Environmental Health & Safety Services
Delta Environmental Consultants, Inc.
6701 Carmel Road
Suite 200
Charlotte, N.C. 28226-3901

Dear Ms. Reid:

This is in response to your January 4, letter requesting an interpretation of the Process Safety Management (PSM) of Highly Hazardous Chemicals standard, 29 CFR 1910.119. Please accept our apology for the delay in response. When a process contains 5,000 pounds (2272.7 kilograms) or more of a 70 percent Tertiary Butyl Hydroperoxide (TBHP) and 30 percent water mixture, it is covered by the PSM standard. Mixtures of greater than 70 percent Tertiary Butyl Hydroperoxide (TBHP) and less than 30% water would also be covered.

Thank you for your interest in occupational safety and health. If we can be of further assistance, please contact us.

Sincerely,



H. Berrien Zettler, Deputy Director
Directorate of Compliance Programs

Standard Interpretations - Table of Contents Standard Interpretations - Table of Contents