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Section §172.328: Cargo 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 172.328 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0008 Public Utilities Commission of Ohio Tom Forbes View
07-0208 American Metals & Chemical Corporation Mr. Barry D. Reichenberg View
07-0212 Georgia Department of Public Safety Capt. Bruce Bugg View
05-0012 Mr. Bob Thompson Mr. Bob Thompson View
13-0127 Public Utilities Commission of Ohio Transportation Department Mr. Tom Forbes View
13-0128 Linde Gas North America LLC Mr. Guy Dalton View
07-0034 Georgia Department of Public Safety Captain Bruce Bugg View
15-0078 Maryland Department of Environment Mr. Michael Polinski View
06-0210 Dufour Petroleum LP Mr. Don Ladner View
16-0004 Texas Department of Public Safety Trooper Kelly F. McClatchy View
09-0039 HazMat Resources, Inc. Mr. Danny Shelton View
06-0235 Railroad Commission of Texas Mr. James T. Osterhaus  View
16-0004 Texas Department of Public Safety Trooper Kelley F. McClatchy View
17-0029 Thatcher Transportation, Inc. Mr. Brent Olsen View