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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 #14-0190 ([Pioneer Tank Lines, Inc.] [Mr. Larry Nielsen])

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

Interpretation Response Details

Response Publish Date:

Company Name: Pioneer Tank Lines, Inc.

Individual Name: Mr. Larry Nielsen

Location State: MN Country: US

View the Interpretation Document

Response text:

March 13, 2015

Mr. Larry Nielsen
Safety and Compliance Manager
Pioneer Tank Lines, Inc.
12501 Hudson Road South
Afton, MN 55001

Reference No. 14-0190

Dear Mr. Nielsen:

This is in response to your October 6, 2014 email and subsequent telephone conversations with a member of my staff requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) relating to segregation requirements for highway transportation. Specifically, you ask if UN 1017 Chlorine must be segregated from other Class 8 (corrosive) liquids for highway transportation.

Chlorine is not prohibited from being transported in the same transport vehicle as Class 8 materials provided the separation requirements in § 177.848(e)(3) are complied with. These materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.

In your incoming request you note that the second half of § 177.848(e)(3) states "Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas." You ask if this exception would apply to a load containing UN 1017 Chlorine and a Class 8 liquid material. As UN 1017 Chlorine is a Division 2.3 (Zone B) material, this exception does not apply.

I trust this information is helpful. If you have further questions, please do not hesitate to contact this office.


Duane A. Pfund
International Standards Coordinator
Standards and Rulemaking Division


Regulation Sections

Section Subject
177.848 Segregation of hazardous materials