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Section §173.134: Class 6, Division 6.2-Definitions and exceptions

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 173.134 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
23-0082 The University of Alabama at Birmingham Justin Roth View
21-0094 Scopelitis, Garvin, Light, Hanson & Feary, P.C. Timothy W. Wiseman View
20-0062 Daniels Training Services, Inc. Daniel Stoehr View
20-0064 MRIGlobal-NCR Malcolm Smith View
21-0002 Centers for Disease Control and Prevention (CDC) Dr. Jeanne Santoli, M.D. View
20-0077 Neoteryx Stuart Kushon View
20-0063 DNA Genotek Austin Udocor View
19-0106 Woodard & Curran, Inc. Kelly V. Camp View
19-0014 Attorney at Law Lawrence W. Bierlein View
19-0032 Locus Biosciences, Inc. Nick Conley View
18-0059 Global First Mr. Thomas Brennan View
18-0071 United States Department of Agriculture Dr. Jack Shere View
17-0076 Vyriad Jon Harrington View
17-0041 WNWN International Mr. Ed Krisiunas View
12-0109 Mr. Andrew Heine View
13-0112 Great Lakes Custom Law Mr. Jason P. Wapieninick View
11-0314 BioStorage Technologies Ms. Darcy Britt View
99-0298 Micro-Med Industries, Inc. Mr. Charles N. Hendrix View
02-0155 St. John's Health System Stephen A. Kemp View
98-0303 Glaxo Wellcome, Inc. Ms. Sally Hamam View
11-0023 BioStorage Technologies Ms. Darcy Britt View
01-0214 Honeywell Ms. Barbara Konrad View
08-0031 UT Southwestern Medical Center Dr. Frank H. Wians, Jr. View
05-0182 Daniels Sharpsmart, Inc. Mr. Terry Grimmond View
14-0208 Washington State Department of Health Mr. Chuck Talburt View
09-0186 Oregon Health and Science University Ms. Debra A. Brickey View
07-0140 Advanced Chemcial Transports, Inc. Mr. James A. Castrodale, Jr View
10-0188 American Veterinary Medical Association Ms. Kristi Henderson View
02-0129 Patton Boggs, L.L.P. Carolina L.Mederos View
14-0060 Safe-T- Pak, Inc. Mr. David Creighton View
99-0037 Allegheny Airlines, Inc Mr. Wayne S. Lester View
06-0094 Quest Diagnostics Mr. Nicholas Pagerly  View
06-0098 PTP Consulting, Inc. Ms. Carol Brozosky, CET, CHMM View
03-0113 New York State Department of Health Ellis Jacobs, Ph.D., DABCC View
12-0247 Curtis Bay Energy Mr. Edward Petrullo View
14-0080 Discovery Laboratories, Inc Ms. Louise J. Calabretta View
03-0139 Brink's U.S. Mr. Stan Turbyfill View
00-0128 Sure-Way Systems, Inc. Mr. Gary Chilcott View
99-0124 Arent Fox Kintner Plotkin Kahn, PLLC Mr. Paul Jackson Rice View
99-0106 Inscite Edward Krisiunas, MT(ASCP), CIC, MPH View
00-0295 Industry Research and Public Affairs Alice P. Jacobsohn, Esq. View
02-0098 CB Healthcare Consulting Caryn M. Bing, Rph, MS, FASHP View
06-0277 National Solid Wastes Management Association Ms. Alice P. Jacobsohn View
16-0019 St. Johns County Utility Department Mr. Tony Cubbedge View
99-0192 Bio-Safe America, Inc. Ms. Samantha Burdick View
99-0311 Dornoch Medical Systems, Inc. Mr. James L. Dunn View
11-0261 Mr. Aaron Hackman View
98-0529 Pall Corporation Ms. Susan Morrissey View
04-0197 Bureau of Radiation Protection, Pennsylvania Department of Environmental Protection Mr. David J. Allard, CHP, Director View
12-0243 New York State Department of Environmental Conservation Alan G. Woodard, Ph.D. View
02-0292 U.S. Geological Survey Dr.Stephen R. Moulton View
02-0299 Air Techniques Elizabeth Paul View
12-0051 United Parcel Service Mr. Samuel Elkind View
08-0252 Federal Reserve System Cash Product Office Federal Reserve Bank of San Francisco, Los Angeles Branch Mr. Alex Torres View
12-0028 Waste and Compliance Management, Inc. Mr. Eric Smith View
09-0065 ACM Global Central Laboratory Ms. Lisa Fotheringham View
10-0141 Triumvirate Environmental, Inc. Mr. John Menzigian View
16-0028 New York State Department of Health Mr. Corey Bennett View
09-0189 The Jackson Laboratory-West Ms. Kristela Ramos View
15-0152 DiSorb Systems, Inc Mr. Ted McLaughlin View
13-0031 Minigrip Mr. Ben Hellming View
00-0104 EnviroTech of America, Inc. Mr. Jeffrey A. Paiste View
06-0181 Laboratory Medicine Consultants Ms. Jane Swerdlow View
16-0044 Hall, Render, Killiam, Heath & Lyman, PC Ms. Amy Berenbaum Goodman View
08-0121 Special Waste Disposal, Inc. Mr. John Grindal View
02-0013 SAIC Frederick Cancer Research Joseph P. Kozlovac, M.S., CBSP, RBP View
09-0043 Otto Environmental Systems Mr. Rob Ellis View
06-0007 Medical Waste Solutions, Inc. Mr. Russell A. Karlins View
01-0245 National Toxicology Program Archives Mr. J. Keith Connelly View
03-0208 FAA Bill Wilkening View
07-0094 MTS Medical Waste Management Mr. Edward Petrullo View
14-0238 Surface Deployment and distribution Command Mr. Marco Boasso View
01-0121 Tri-State Hospital Supply Corporation Mr. Trent Sisco View
13-0077 Bellevue Hospital Center Mr. Kieran Toale View
13-0041 Carry and Clean, LLC Mr. H. Michael Lord View
12-0193 HAZ-MAT Transportation Services Mr. Jack Peters View
03-0045 U.S. Army Center for Health Promotion and Preventive Medicine
Entomological Sciences Program
Ms. Sandra R. Evans View
15-0020 South Carolina Department of Health and Environmental Control Bureau of Laboratories Mr. Brian Gootee View
07-0057 Stericycle, Inc. Ms. Selin Hoboy  View
07-0025 LMC Pathology Services Ms. Jane Swerdlow View