# Oilmen’s Truck Tanks — Hazardous Materials Safety Interpretation - **operation:** document - **citation:** 21-0001 - **title:** Oilmen’s Truck Tanks — Hazardous Materials Safety Interpretation - **source type:** guidance - **agency:** Pipeline and Hazardous Materials Safety Administration - **status:** guidance - **official:** true - **published on:** 2021-05-17 - **effective on:** Not available - **summary:** 21-0001 response to Oilmen’s Truck Tanks concerning 171.2, 173.150. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-21-0001.json - **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-21-0001.md - **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-21-0001 - **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/75041/210001.pdf **body:** <<>> U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Avenue, SE Washington, DC 20590 May 17, 2021 Robert Strong Design Certifying Engineer Oilmen’s Truck Tanks 140 Cedar Springs Rd Spartanburg, SC 29304 Reference No. 21-0001 Dear Mr. Strong: This letter is in response to your December 31, 2020, email requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to the motor vehicle transportation of packages containing diesel fuel and gasoline connected via piping. Specifically, you describe two scenarios, and ask whether the described package arrangements meet the requirements of the HMR. Additionally, you ask a question regarding the HMR’s hazard communication requirements for each scenario. Scenario #1: You describe a package arrangement consisting of multiple refueling tanks, each tank with a capacity of 119 gallons. The tanks are connected via piping with ball valves capable of isolating each tank. The material intended for transportation in this scenario is diesel fuel. Although not explicitly described, for the purposes of this response, it is assumed that the diesel fuel in question has a flash point at or above 38 °C (100 °F), and, therefore, is eligible for the combustible liquid exception found in § 173.150(f). Scenario #2: You describe a package arrangement consisting of multiple 119-gallon metal refueling tanks manufactured in accordance with Department of Transportation DOT special permit (DOT-SP) 14227. The tanks are connected via piping with ball valves capable of isolating each tank. The material intended for transportation in this scenario is gasoline. We have paraphrased and answered your questions as follows: Q1. You ask whether the package arrangement described in Scenario #1 meets the requirements of the HMR. <<>> A1. The answer is yes, if the ball valves separating the individual tanks are in a closed position while in transportation. If there are no stop valves on each individual outlet preventing the flow of lading between tanks, and free flow between tanks is allowed during transportation, then the tanks would be considered a single bulk package and the requirements of § 173.150(f)(3) would apply, including marking and placarding. A hazardous material classed as a combustible liquid in a non-bulk package (capacity less than or equal to 119 gallons) is not subject to the requirements of the HMR (see § 173.150(f)(2)). Q2. You ask whether the packaging arrangement described in Scenario #2 meets the requirements of the HMR. A2. The answer is no. DOT-SP 14227 prohibits manifolded packages; see section 7.c.(3) in the enclosed copy. Please note that packages connected by piping or tubing are considered “manifolded” for the purpose of DOT SP-14227, regardless of whether the valves are in the open or closed position. Q3. For both scenarios, you ask whether placards are required on all four sides of each of the individual tanks, or all four sides of the transport vehicle. A3. For Scenario #1 - No hazard communication is required, either on the tanks or the transport vehicle, if the valves are closed because non-bulk packages (119 gallons or less) containing a combustible liquid are not subject to the HMR requirements, including hazard communication for highway transportation. However, if any free flow exists between tanks during transportation, the individual tanks attached to the motor vehicle are considered a single bulk packaging (e.g., portable tank, IBC, or cargo tank, depending on how the packaging is constructed and used in transportation) and must comply with all applicable requirements including placarding requirements for a particular bulk package and the transport vehicle. For Scenario #2 - The hazard communication requirements for DOT-SP 14227 packages are included in paragraph 7.c.(5) of the special permit, specifically that each tank must be marked and placarded in accordance with the requirements for Intermediate Bulk Containers (IBCs). However, the manifolded packages do not comply with the requirements of DOT-SP 14227, and, therefore, are not in compliance with the HMR (see § 171.2(g)). Please note, the requirements for a commercial driver’s license (CDL) (See 49 CFR Part 383) are under the purview of the Federal Motor Carrier Safety Administration (FMCSA). FMCSA is the lead Federal government agency responsible for regulating and providing safety oversight of commercial motor vehicles. <<>> You may wish to contact FMCSA should you require clarification of any requirements relevant to CDLs. I hope this information is helpful. Please contact us if we can be of further assistance. Sincerely, Dirk Der Kinderen Chief, Standards Development Branch Standards and Rulemaking Division <<>> Patrick From: INFOCNTR (PHMSA) To: Hazmat Interps Subject: FW: Interpretation Letter Request Date: Monday, January 4, 2021 12:33:01 PM Attachments: fueler piping.png UPDATED TO 21-0001 FROM 20-0098 Hello, See below and attached picture request for interpretation. Thanks, Jonathon, HMIC From: Raynor, T'Mia (PHMSA) Sent: Thursday, December 31, 2020 1:48 PM To: INFOCNTR (PHMSA) Subject: Fwd: Interpretation Letter Request T’Mia Raynor Webmaster PHMSA Office of the CIO (PHF-30) Desk: (202) 366-9818 | Mobile: (202) 580-9447 From: Robert Strong Sent: Thursday, December 31, 2020 8:00:31 AM To: PHMSA Pipelinesafety Cc: PHMSA Website Manager Subject: Interpretation Letter Request CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links or open attachments unless you recognize the sender and know the content is safe. Good morning, I would like to request a formal letter of interpretation for the following questions. I have two questions regarding a further interpretation of Interpretations 88-0026 and 15-0135. These Interpretations state that a tank is not considered manifolded together with other tanks if a stop valve is used between the tanks and in the closed positions. When applying this to multiple individual tanks on a flatbed, as shown in the attached figure, the two following cases arise. The first case is hauling diesel in 2 (or more) 119 gallon individual tanks on a flat bed, with ball valves on the outlet piping of each tank, connected to a single pump, as shown in the attached figure. The driver in this case would not have a CDL or a HAZMAT endorsement since the truck would be less than 33,000 lbs GVWR. <<>> The second case is hauling gas in 2 (or more) 119 gallon individual tanks manufactured under DOT- SP 14227. These tanks are also connected in the same manner as the first case, with a ball valve between each of the individual tanks and the pump, as shown in the attached figure. The driver in this case would also not have a CDL or a HAZMAT endorsement since the truck would have a GVWR less than 33,000 lbs. Are both of these cases compliant with HAZMAT regulations and would be considered legal for the transportation of diesel in case 1 and gas in case 2? Also, if these cases are HAZMAT compliant, are the placarding requirements in this case limited to each of the individual tanks being placarded on all 4 sides, or do all 4 sides of the transport vehicle need to be placarded as well? Best, Robert Strong, Eng.D. Design Certifying Engineer Oilmen’s Truck Tanks 140 Cedar Springs Rd. Spartanburg, SC 29304 864-699-7521 (Direct) 863-278-3677 (Cell) www.trucktanks.com - **truncated:** false - **body characters:** 7623