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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 #PI-76-0121 ([Transportation Safety Institute] [Mr. Edward J. Ondak])

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

Interpretation Response Details

Response Publish Date:

Company Name: Transportation Safety Institute

Individual Name: Mr. Edward J. Ondak

Location State: OK Country: US

View the Interpretation Document

Response text:


June 23, 1976

Mr. Edward J. Ondak
Program Manager
Transportation Safety Institute
6500 South MacArthur Boulevard
Oklahoma City, Oklahoma 73125

Dear Mr. Ondak:

This responds to your memorandum dated May 24, 1976, in which you asked for a decision concerning the technique of using soil resistivity alone as an electrical survey to determine the areas of active corrosion.

Enclosed is a copy of OPSO Advisory Bulletin No. 76-2, that contains the official OPSO interpretation of the term "electrical survey." Although areas of active corrosion have been shown to correlate highly with soil resistivity, this technique by itself does not fully meet the requirements as set forth in the above interpretation. While the Office of Pipeline Safety Operations permits the use of consultants, it is the operator's responsibility to choose the methodology to meet the requirements of the Federal safety standards.

We trust that this clarifies what OPSO expects in the way of compliance.


Cesar DeLeon
Acting Director
Office of Pipeline
Safety Operations

Regulation Sections

Section Subject
192.457 External corrosion control: Buried or submerged pipelines installed before August 1, 1971