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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #05-0091 ([Airgas, Inc.] [Mr. John Anderson])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Airgas, Inc.

Individual Name: Mr. John Anderson

Location State: WY Country: US

View the Interpretation Document

Response text:

May 3, 2005


Mr. John Anderson                    Reference No. 05-0091
Director of DOT Operations
Airgas, Inc.
P.O. Box 20067
Cheyenne, WY 20067

This responds to your letter regarding the emergency response telephone number requirements under the Hazardous Materials Regulations (HMR; 49 CFR parts 171-180). You ask whether a telephone number that provides the caller an automated option for forwarding the call to CHEMTREC or a similar emergency response service is acceptable.

The answer is yes. As required by § 172.604, the emergency response telephone number must be monitored at all time the hazardous material is in transportation by a person who is either knowledgeable of the characteristics of the hazardous material and has comprehensive emergency response information, or has immediate access to a person who possesses such knowledge. It is the opinion of this Office that a telephone number with a one-stroke patch-through capability to CHEMTREC or a similar emergency response service satisfies the requirement of “immediate: access to a person with detailed emergency response information.”

I trust this satisfies your request.



Hattie L. Mitchell
Chief, Regulatory Review and Reinvention
Office of Hazardous Materials Standards


Regulation Sections

Section Subject
172.604 Emergency response telephone number