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 |
---|---|---|---|---|
21-0089 | Molecule Corp. Company | Nick Talken | View | |
21-0082 | Onepoint4 Ltd. | Peter Shelley | View | |
21-0087 | National Institute of Standards and Technology | Mr. Larry Lucas | View | |
21-0099 | Lithium Battery Service GbR | Eva Glimsche | View | |
21-0076 | American Cylinder and Safety | Myles L. TenBroeck | View | |
21-0105 | Evonik Corporation | Robert Miller | View | |
21-0077 | Oak Harbor Freight Lines, Inc. | Jeff McLaughlin | View | |
21-0053 | National Fireworks Association | Steve Houser | View | |
21-0020 | Transport Canada, Ontario Region | Brent Grice | View | |
21-0068 | Kajuligan, Inc. | Cliff Croft | View | |
21-0086 | OMG Inc. | Bradley Bedard | View | |
21-0091 | Entegris | James V. McManus | View | |
21-0094 | Scopelitis, Garvin, Light, Hanson & Feary, P.C. | Timothy W. Wiseman | View | |
21-0057 | Hogan Lovells US LLP | Latane R. Montague | View | |
PI-21-0009 | CH-IV | Mr. Juan Carlos Rivadeneira | View | |
PI-20-0014 | Manatt, Phelps, and Phillips, LLP representing Chemoil | Mr. Matthew Williamson | View | |
21-0060 | Massachusetts State Police | Scott Maguire | View | |
21-0085 | Healthcare Waste Institute | Darrel K. Smith | View | |
21-0065 | Smarter Sorting | AJ Kenny | View | |
21-0084 | Koorsen Fire & Security | Brick Keltner | View | |
21-0043 | American Bureau of Shipping | Simone Goncalves | View | |
21-0078 | Remora Carbon | Christina Reynolds | View | |
21-0037 | Law Offices of Steven W. Hansen | Steven W. Hansen | View | |
21-0066 | Robert L. Beck | View | ||
21-0026 | Airgas USA, LLC | John Anderson | View | |
21-0051 | Railsback Hazmat Safety Professionals, LLC | Rex Railsback | View | |
21-0064 | Ocean Network Express (North America) Inc. | Lisa Stone | View | |
21-0073 | Superior Plus Propane | Timothy Decker | View | |
PI-21-0008 | Audubon Field Services | Mr. Bryan Louque | View | |
PI-21-0003 | Pennsylvania Public Utility Commission | Ms. Stephanie M. Wimer | View | |
21-0061 | National Transportation Safety Board (NTSB) | Rachael Gunaratnam | View | |
21-0038 | Momentive Performance Materials | Ms. Kirsten Pink | View | |
21-0054 | TCIX Rail | Keenan Moore | View | |
21-0041 | Mr. Robert J. Howell | View | ||
21-0058 | KBI | Paul D. Johnson | View | |
21-0030 | Wellmatics | Joshua Howk | View | |
21-0049 | Wisconsin State Patrol | Christopher Caldwell | View | |
21-0067 | Transportation Compliance Associates, Inc. | Michael D. Alston | View | |
21-0040 | Department of the Army, Army Sustainment Command (ASC) ASC Packaging, Storage, and Containerization Center Logistics, Testing, and Applications Division | Ryan Roberts | View | |
21-0032R | Bettis Asphalt & Construction, Inc. | Cole Andersen | View | |
PI-20-0015 | RCP Inc. | Mr. W. R. Byrd | View | |
21-0052 | Amazon | Marianna Patterson | View | |
20-0086 | Cylinder Sales and Testing, LLC d/b/a Coastal Hydrotesting | Jeffery Strong | View | |
21-0027 | ACTenviro | Aaron Hayward | View | |
21-0039 | Tank Car Safety | Kenneth Dorsey | View | |
PI-19-0019 | Arizona Corporation Commission | Mr. Eric Villa | View | |
PI-21-0006 | Shell Pipeline Company LP | Ms. Deborah Price | View | |
21-0048 | EnerSys | Steven Spease | View | |
20-0096 | NEX-XOS Worldwide, LLC | Saul Mishkin | View | |
21-0047 | Safeway Transportation | Richard Elliott | View |