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Section §172.604: Emergency response telephone number

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 172.604 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0107 Roadrunner Transportation System LLC Mr. Karl Kronau View
20-0095 Council on the Safe Transportation of Hazardous Articles Tom Ferguson View
19-0056 Woodard & Curran Kelly Camp View
17-0118 The Council on Safe Transportation of Hazardous Articles (COSTHA) Ms. Lara Currie View
02-0149 Office of Hazardous Materials Enforcement Doug S. Smith View
98-0045 Dangerous Goods of America, Inc. Mr. Fred Romero View
10-0262 Veolia ES Technical Solutions, L.L.C. Mr. Tom Baker Director View
06-0056 NACA Logistics Mr. Eric Fischer View
11-0008 J.J. Keller and Associates, Inc. Mr. Thomas J. Ziebell View
07-0142 CMA CGM (America), Inc. Mr. Kevin Reposa View
11-0005 Suttons International Mr. David Brown View
12-0119 Hazmat Service, Inc. Mr. Mark Phillip View
02-0196 BMW Group Christian Baierl View
11-0152 FedEx Express Mr. Thomas (TJ) Leech, III, View
15-0108 W. J. Byrnes & Co Ms. Daisy Tate View
15-0121 The Lane Construction Corporation Ms. Michele A. Jacobs View
11-0039 LAN CARGO Mr. Carlos Ferriol View
01-0072 Container Service Co. Mr. Stephen C. Fulton View
17-0006 Baker Hughes Mr. Joseph Murphy View
05-0091 Airgas, Inc. Mr. John Anderson View
01-0159 Nuckly Packaging Company, Inc Mr. Anthony Galang View
00-0280 Transportation Consulting Services Mr. Andrew C. Rymer View
01-0176 William Quade View
10-0226 NACA Logistics (USA) Inc. dba Vanguard Logistics Mr. Eric Fischer View
06-0030 TEN-E Packaging Services, Inc. Mr. Robert J. Ten Eyck View
10-0146 Clean Harbors Environmental Services, Inc. Mr. Anthony Cellucci View
04-0032 Currie Associates, Inc Mr. John V. Currie View
14-0131 Valley Equipment Leasing Mr. Mark Dhority View
09-0246 Valero Hartford Terminal Ms. Sherri Snyder View
10-0051 Minnesota Department of Transportation Mr. Michael Ritchie View
00-0368 American Dental Supply, Inc. Mr. Les Hochhauser View
01-0018 Overnite Transportation Company Mr. Garry Howell View
11-0260 W.E. Train Consulting Mr. Gene Sanders View
16-0156 Veolia North America Ms. Jennifer Eberle View
03-0318 Hyundai America Shipping Agency, Inc. Mr. Herbert Giles View
01-0035 Polar Air Cargo Mr. Paul J. Zinza View
10-0029 DG Advisor, LLC Mr. Ben Barrett DG Advisor, LLC View
01-0068 LR International Cosmetic & Marketing GmbH & Co. Mr. Michael Miska View
14-0245 Kajuligan Inc. Mr. Cliff Croft View
16-0157 Regulatory Resources Inc. Mr. W A Winters View
00-0352 Vinson & Elkins L.L.P. Mr. David Tuckfield View
09-0007 Mr. Joseph A. Taranovich American Honda Motor Company View