USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation


Section §177.848: Segregation of hazardous materials

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 177.848 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0090 Hunting Titan Joseph Murphy View
18-0123 Jet Research Center Mark Cipolla View
17-0064 Regulatory Resources, Inc. Mr. Wade Winters View
17-0109 Hunting Titan, Inc Joe Murphy View
16-0202 Valley View Industries, Inc Timothy Kenney View
03-0120 Department of California Highway Patrol Officer George Barber View
11-0166 Con-way Freight Ms. Marie Easley-Cook View
00-0328 HITECH Ms. Jackie Brian View
03-0146 Department of California Highway Patrol Officer George Barber, CHPO, 10665 View
08-0201 Triumvirate Environmental, Inc. Mr. John Menzigian View
05-0164 The Procter & Gamble Company Mr. Steven L. Dishion View
98-0552 Olin Microelectronic Materials Ms. Naomi Livingston View
08-0126 Austin Powder Company Mr. Larry J. (Scooter) King View
99-0319 Department of the Army Mr. David B. Terry View
98-0553 Mr. Kent Blair View
00-0056 Textron Systems Corporation Mr. William Porter View
99-0306 California Highway Patrol< Mr. George Barber View
12-0064 Boyle Transportation Mr. Rick Araniz View
02-0227 Department of Environmental Protection, State of New Jersey Robert Gomez View
13-0111 Baker Hughes Mr. Aubrey R. Campbell View
99-0203 Office of Material Movemen Department of the Army View
13-0173 KIK Custom Products - Classic Division Ms. Stacey Gorka View
02-0142 White House Sales Mark Frese View
10-0208 Boyle Transportation Mr. Steven P. Norbeck, CDS View
01-0294 Department of the Army Mr. William R. Frerichs View
98-0562 Mr. Kent Blair View
08-0192 Titan Specialties, Ltd. Ms. Shelly Espinoza View
03-0198 Heritage Environmental Services Mr. David E. Blair View
08-0216 Hawkins, Inc. Mr. Chris W. Gibson View
99-0300 A/C Industrial Service Mr. Malcolm G. Maxwell View
03-0115 McCarthy, Sweeney & Harkaway, P.C. Mr. Lawrence W. Bierlein, Esq. View
10-0107 California National Guard U.S. Army Mr. Robert Morrow View
11-0011 Sunny Point Military Ocean Terminal - DSN 488 Ms. Lonnie Burks View
16-0117 Pioneer Tank Lines, Inc. Mr. Larry Nielsen View
15-0136 Mr. Edwin Van Schoick View
03-0023 Leslie"s Poolmart, Inc. Mr. Mike Jennings View
04-0236 Tom Dunaway & Associates, Inc Mr. Robert Brown, Jr. View
16-0129 National Cargo Bureau Mr. Edward Walker View
04-0260 J & R Brokerage, Inc. Mr. John F. Martin View
09-0252 Safcomar, Inc. Mr. Alex Henderson View
09-0268 Dole Explosives, Inc. Mr. Samuel Dole View
10-0144 MAR COR PURIFICATION Mr. Rollie Weberg View
03-0297 Sure-Way Systems, Inc. Mr. Gary Chilcott View
03-0300 Spray Chern Chemical Company Mr. Cliff Jacobson View
08-0143 Hawkins, Inc. Mr. Chris W. Gibson View
02-0310 Spray Chem Chemical Company, Inc. Clifford L. Jacobson View
04-0031 Spray Chem Chemical Company Mr. Cliff Jacobson View
14-0190 Pioneer Tank Lines, Inc. Mr. Larry Nielsen View
03-0263 Clean Harbors Environmental
Services, Inc.
Ms. Susan J. Sevy View
01-0280 Department of the Army Mr. William R. Frerichs View