Wednesday, March 13, 2024

Review - PHMSA Publishes Latest Additions to FAQ List – HAZMAT Training

Today, the DOT’s Pipeline and Hazardous Materials Safety Administration (PHMSA) published a notice I the Federal Register (89 FR 18479-18482) listing the latest additions to their list of frequently asked questions (FAQ). Back in March of 2022, PHMSA began the process of converting existing Letters of Interpretation (LOI) into frequently asked questions of broader interest to the HAZMAT community. This latest tranche of questions deals with hazardous materials safety training in support of the hazardous materials regulations. The second set of questions was published [removed from paywall] in August of 2023.

Solicitation of Public Comments

PHMSA is soliciting public comments on this proposed set of FAQ and responses. Comments may be submitted via the Federal eRulemaking Portal (; Docket #PHMSA-2021-0109). Comments should be submitted by April 12th, 2024.


As I found previously, PHMSA has not apparently published the two previous sets of FAQs on their web site. There are currently two different FAQ lists (here and here). The first was updated in September of last year and the former was updated in 2019, but neither contain the FAQs previously published as part of this initiative. These FAQ’s would fit in very well with the first page of existing FAQs as it has sub-pages for different topics.


For more information on this notice, including a list of new FAQ questions, see my article at CFSN Detailed Analysis - - subscription required.

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