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Section §173.32: Requirements for the use of portable tanks

Below are the available interpretations and guidance for the given section. To return to the list of parts, use the Parts link above. If you do not see any guidance or interpretation information below, that means there is none available for the given part/section. Return to the search page to browse additional regulations sections.

PHMSA has published several Frequently Asked Questions (FAQ) documents on regulatory topics. Please review our FAQ documents below:

Additionally PHMSA has Hazardous Materials FAQs based on letters of interpretation on the following topics:

This section of the website provides the ability to find regulations information including regulations parts, content of sections, and interpretations for regulations sections. Below is a list of parts, identified by the part number and subject. To browse sections by part, click on the subject link below. You will be taken to the eCFR website to view sections for a part.

A written regulatory interpretation, response to a question, or an opinion concerning a pipeline safety issue may be obtained by submitting a written request to the Office of Pipeline Safety (PHP–30), PHMSA, U.S. Department of Transportation, 1200 New Jersey Avenue SE., Washington, DC 20590–0001 or at the email address: In addition to email address, the requestor must include his or her return address and should also include a daytime telephone number. Requests should be submitted at least 120 days before the time the requestor needs a response.

Note: electronic submission is provided as alternative to the 49 CFR Part 190.11(b) mail-in requirement.

The regulations text of the section can be found on the eCFR website. To view the regulations text, use the link below. For assistance, please send an email to

View section 173.32 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
21-0060 Massachusetts State Police Scott Maguire View
21-0035 Momentive Performance Materials Kirsten Pink View
18-0109 Jeffrey Cline View
14-0030 Burdette & Associates, Inc. Mr. Michael Burdett View
03-0059 Alta Genetics, Inc. Mr. Jason E. Burnett View
99-0168 HMT Associates, L.L.C. Mr. Andy Altemos View
12-0168 WR Grace Mr. Norm Stollberg View
13-0117 DuPont Company Mr. Randy Martin View
99-0062 Mr. C. Vleugels View
11-0161 Young & Franklin Inc. Mr. Greg Michalowski View
98-0521 Eurotainer USA, Inc. Mr. Terrence Noonan View
17-0045 SeaFair USA LLC Mr. Michael Daum View
07-0184 Environmental Containment Solutions Mr. Roger Davies   View
13-0006 Baker Hughes Mr. Aubrey R. Campbell View
00-0379 United States Senate The Honorable John Breaux View
06-0208 ETCetera International, Inc Mr. Jim Anderson  View
08-0272 DuPont Company Mr. Randolph Martin View