PHMSA has published several Frequently Asked Questions (FAQs) documents on programmatic topics. Please review these documents here at: https://www.phmsa.dot.gov/about-phmsa/phmsa-faqs.
Additionally, Office of Hazardous Materials Safety has published Hazardous Materials FAQs based on letters of interpretation on the following topics:
- Applicability of the Hazardous Materials Regulations
- Hazardous Materials Incident Reporting
- Training Requirements
Office of Hazardous Materials Safety: For questions about transporting hazardous materials, needing clarifications of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180), or requesting a formal letter of interpretation, please go to the Hazardous Materials Information Center (HMIC) page for contact information (phone and email address).
Office of Pipeline Safety: 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: pipeline_interp_submittal@dot.gov. 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.
This section of the website below provides the ability to find regulations information including regulations parts, content of sections, and interpretations for regulations sections. A list of parts, identified by the part number and subject is also provided. 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.
The eCFR is also searchable by keyword and other available options on the eCFR website. To search and browse regulations using the eCFR website, use the link below. For assistance, please send an email to PHMSA.Webmaster@dot.gov.
Search the eCFR
Ref ID: | Date Sort ascending | Company Name | Individual Name | Response Document |
---|---|---|---|---|
22-0068 | Detroit Scrap Consulting Services | Ty Cox | View | |
22-0043 | Alabama Liquefied Petroleum Gas Board | W. Mark Nelson | View | |
22-0045 | Parker Hannifin Corporation | Erik Steinbeck | View | |
22-0046 | Entegris Inc. | Jim McManus | View | |
22-0015 | ICE Service Group & SPS Packaging Systems | Kurt Colborn | View | |
PI-22-0013 | BGC Engineering Inc. | Mr. Mark Zellman | View | |
22-0049 | Linde Gas & Equipment Inc. | Mike Stephens | View | |
22-0020 | Justin Lacy | View | ||
22-0011 | Betts Industries, Inc. | David J. Adams | View | |
22-0022 | Duke Energy Corporation | Charles Denny | View | |
21-0069 | UL LLC | Mr. Blake Shugarman | View | |
21-0098 | Dominion Energy | Mr. Tim Carter | View | |
22-0006 | Daniels Training Services Inc. | Mr. Daniel Stoehr | View | |
22-0009 | Council on Safe Transportation of Hazardous Articles | L’Gena Shaffer | View | |
22-0039 | DHL Global Forwarding | Dennis Raymund V. Franco | View | |
22-0032 | Shanghai Research Institute of Chemical Industry Testing Company, Ltd. | Bin Fan | View | |
PI-22-0011 | International Union of Operating Engineers, Local No. 49 | Mr. Christopher J. Chantry | View | |
22-0024 | Keller and Heckman, LLP | Trent Doyle | View | |
21-0097 | East Bay Law | Andrew W. Shalaby | View | |
21-0102 | George W. Wright & Associates, LLC | Doris Soran | View | |
22-0004 | OSM, LLC | Ann Fukunaga | View | |
22-0005 | Desert Isle Inc., Lahaina Air Conditioning, Ltd. | Peter Faulkner | View | |
PI-22-0007 | New Fortress Energy | Mr. Brannen McElmurray | View | |
PI-22-0008 | National Transportation Safety Board | Ms. Sara Lyons | View | |
PI-22-0006 | CH-IV Regulatory | Mr. Juan Carlos Rivadeneira | View | |
22-0017 | Old Bridge Chemicals, Madison Industries, Inc. | Sandy Volk | View | |
22-0001 | ShipMate, Inc. | Steven Charles Hunt | View | |
22-0019 | CBC Brazilian Cartridge Company | Mariele Aparecida Nonis Munhoz | View | |
PI-22-0004 | On behalf of Philadelphia Gas Works Regulatory | Mr. Joel Greene & Ms. Sarmentero Garzón | View | |
19-0018R | Council on Safe Transportation of Hazardous Articles | Tom Ferguson | View | |
22-0008 | Public Utilities Commission of Ohio | Tom Forbes | View | |
22-0012 | Regulatory Resources, Inc. | W. A. Winter | View | |
07-0166R | CTC Certified Training Co. | Darrel K. Garton | View | |
PI-21-0007 | Puget Sound Energy | Kaaren Daugherty | View | |
22-0003 | Ordnance Lab LLC | Sean Lindley | View | |
21-0113 | TEN-E Packaging Services, Inc. | Robert Ten Eyck | View | |
21-0062 | Institute of Makers of Explosives | Susan JP Flanagan | View | |
21-0115 | Intermodal Tank Transport | Jasmine Builes | View | |
PI-22-0001 | I.B.E.W. Local Union 503 | Ms. Melissa Kurtz | View | |
21-0103 | Eos Energy Storage | Heidi Countermine | View | |
21-0059 | XPO Logistics | Ms. Marie Copeman | View | |
21-0107 | Amanda White | View | ||
21-0071 | Air General, Inc. | Charles A. White | View | |
21-0112 | Sheetz, Inc. | Roy Terwilliger | View | |
21-0074 | Commercial Vehicle Safety Alliance | Collin B. Mooney | View | |
21-0100 | Hydro-Test Products, Inc. | Carlos Graca | View | |
21-0101 | Hydro-Test Products, Inc. | Carlos Graca | View | |
21-0090 | High Precision Gas | Mr. Justin Wai | View | |
21-0095 | DynaEnergetics US Inc. | Mr. Ed Zinsmeyer | View | |
21-0096 | Imperative Chemical Partners | Shawn Melson | View |