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Section §172.602: Emergency response information

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 172.602 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
24-0011 Ohio Public Commission Tom Forbes View
22-0107 Roadrunner Transportation System LLC Mr. Karl Kronau View
22-0086 Fujitrans USA Inc. Laura Warren View
21-0074 Commercial Vehicle Safety Alliance Collin B. Mooney View
21-0025 Schneider National Bulk Carriers Shannon Schick View
20-0095 Council on the Safe Transportation of Hazardous Articles Tom Ferguson View
18-0083 Kansas Highway Patrol Nicholas Wright View
17-0082R Save the Situation Eva Glimsche View
17-0082 Save the Situation Ms. Eva Glimsche View
17-0086 CFI Mr. Jeff Messer View
98-0425 Liquid Transport Corporation Mr. Frank L. Boone View
07-0039 Hapag-Lloyd (America) Inc. Mr. Robert F. Ahlborn View
08-0240 Association of American Railroads Mr. Robert E. Fronczak View
04-0149 Chemical Accident Reconstruction & Services, Inc Michael Fox, Ph.D View
02-0179 URS Corporation Andrew N. Romach View
00-0307 Rinchem Company, Inc. Mr. Robert L. Edgar View
99-0018 Ms. Susan G. Oliver View
12-0259 Dangerous Goods Advisory Council Mr. Vaughn Arthur View
13-0106 Kriska Transportation Mr. Bob Duncan View
14-0138R Polytek Development Corp. Ms. Cynthia Salisbury View
98-0045 Dangerous Goods of America, Inc. Mr. Fred Romero View
13-0081 Kriska Transportation Mr. Rob Duncan View
12-0068 Argonne National Laboratory Mr. Lee Stevens View
11-0230 DHL Global Forwarding Ms. Dorothea A. Welk View
02-0250 Royalty Trucking, Inc. Larry Riestenberg View
09-0215 Mr. Steve Laughlin View
05-0046 Allied Universal Corporation Ms. Robin J. Eddy Bolte View
11-0260 W.E. Train Consulting Mr. Gene Sanders View
14-0138 Polytek Development Corp Mr. Keith E. Smith View