# Horizon Lines, LLC — Hazardous Materials Safety Interpretation **Citation:** 05-0161 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2005-08-16 05-0161 response to Horizon Lines, LLC concerning 176.80, 176.83. ## Document text <<>> of Transportation U.S. Department Washington, D.C. 20590 400 Seventh Street, S.W. Pipeline and Administration Hazardous Materials Safety AUG 1 6 2005 Mr. Cliff Bartley Ref. No. : 05-0161 Manager, Hazardous Materials Blount Island Horizon Lines, LLC 5800-1 William Mills Street Jacksonville, FL 32226-4013 Dear Mr. Bartley: This is in response to your June 23, 2005 letter regarding segregation requirements for hazardous materials in limited quantities transported by vessel under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Your questions are paraphrased and answered as follows: Q1. Are hazardous materials in limited quantities excepted from segregation within a freight container under § 176.80 (b) and from the container segregation requirements in § 176.83 (f)? Al. Yes. Section 176.80 (b) specifically states "Hazardous materials in limited quantities when loaded in transport vehicles and freight containers are excepted from the segregation requirements of this subpart and any additional segregation specified in this subchapter for transportation by vessel." Different packages of two hazardous materials that normally require segregation from one another may be stowed together in the same freight container when either or both of the materials are packaged only as limited quantities. With respect to and only a tated. segregation between freight containers, no segregation need be applied between a freight container loaded only with materials packaged as limited quantities and other containers whether or not the hazardous materials in those other containers are packaged as limited quantities. 174.80 17683 050161 <<>> 22. Under § 176.80 (b), are hazardous materials in limited quantities excepted from stowage requirements specified in Subparts G through 0 of Part 176? A2. As discussed in Al, stowage requirements that specify segregation between hazardous materials do not apply to limited quantities transported by vessel; however, stowage requirements other than those that specify segregation of hazardous materials are applicable to use of the IMDG Code in place of the provisions in the limited quantities. Please also note, that the HMR allow HMR subject to the conditions and limitations in § 171.12 (b). With respect to stowage provisions for limited quantities, paragraph 3.4.3 of the IMDG Code allows the use of stowage Category A for hazardous materials transported as limited quantities regardless of the stowage category assigned for the material in column (16) of the Dangerous Goods List in Chapter 3.2 of the IMDG Code. I hope this information is helpful. If you have further questions, please do not hesitate to contact this office. Sincerely, Hattie b. Mitchell Office of Hazardous Materials Standards Chief, Regulatory Review and Reinvention <<>> MAORZON Pollack June 23, 2005 §178.80 Mr. Ed Mazzullo $176.83 Director Office of Hazardous Materials USDOT / PRMSA / DHM10 Hazardous Materials Standards segregatoy 400 7* Street S.W. 15-0161 Washington, DC 20590 Re: Subpart D - General Segregation Requirements 49CFR176.80 - Applicability Dear Mr. Mazzullo, am seeking additional understanding on the requirements for the shipment of "limited quantities" Our company, Horizon Lines, LLC is a domestic containerized ocean transportation company. I in containers. The hazmat regulations in 49CFR176.80(b) states that: "Hazardous materials in "limited segregation requirements of this subpart and any additional segregation specified in this quantities" when loaded in transport vehicles and freight containers, are excepted from the subchapter for transportation by vessel." Please provide guidance on the following four questions: 1. Hazardous materials in limited quantities are excepted from any segregation within a container under 176.83(b) 2. Hazardous materials in limited quantities are also excepted from the container segregation requirements requirement of 176.83(f) 3. This subpart also covers the vessel segregation for above and below deck stowage as requirements as noted by the statement that limited quantities are also excepted from indicated by 176.83(f). Are "limited quantities" also excepted from the stowage 4. Does the aditional segron tom incide an exception to the detailed sioway vessel?» Your assistance will be beneficial in our understanding in the regulations covering the handling of limited quantities. Thank you for your attention to these questions. Sincerely, liff bulle Cliff Bartley, Manager Hazardous Materials Horizon Lines • Blount Island • 5800-1 William Mills Street • Jacksonville. FL. 32226 • 904.757.8266 • www. hor zon-lines.com ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `de8a75d8cba08653ad897cbc94e69431d048dd23245570d133e179b4e5f898a4` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-23T00:02:11.124Z - Document slug: `phmsa-interpretation-05-0161` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "Horizon Lines, LLC" ], "individuals": [ "Mr. Cliff Bartley" ], "refIds": [ "05-0161" ], "catalogDates": [ "2005-08-16" ], "catalogParts": [ 176 ], "catalogRowCount": 2, "sourceRecordUrls": [ "https://www.phmsa.dot.gov/node/53461" ], "linkedAttachmentUrls": [], "unavailableResponseUrls": [], "duplicateRepresentationUrls": [], "citedSections": [ "176.80", "176.83", "174.80", "171.12", "178.80" ], "catalogPageUrls": [ "https://www.phmsa.dot.gov/regulations/title49/section/17680", "https://www.phmsa.dot.gov/regulations/title49/section/17683" ], "pdfUrls": [ "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2005/050161.pdf" ], "representations": [ { "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2005/050161.pdf", "detailUrl": null, "detailHtmlPath": null, "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2005/050161.pdf", "pdfArtifactPath": "data/sources/phmsa-interpretations/05-0161-8d8cd59f8a.pdf", "pdfArtifactSha256": "8adf73dcf2e8d1d59f3060e53aff2053b96610580cef5db1fc33e3e9ca9b7706", "extractedTextPath": "data/sources/phmsa-interpretations/05-0161-8d8cd59f8a.v2.txt", "extractedTextSha256": "1f24ac062ec4a4c5f537454e6d432c6c38066198ebb7c1ec543bb66a75ca1383", "pageCount": 3, "extractionVersion": 2 } ], "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.", "jurisdiction": "US" } ```