Sumter Transport — Hazardous Materials Safety Interpretation

Page 1400 Seventh Street, S.W. Research and Washington, D.C. 20590 Administration special Program: JAN 2 7 2000 Mr. Scott W. Rumph 'umter Transpor Ref. No. 00-0010 70 South Lafayette Driv Sumter, South Carolina 29150 Dear Mr. Rumph: This responds to your letter, dated October 29, 1999, concerning cargo tank specification requirements in the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask about a design modification to MC 307, MC 312, DOT 407, and DOT 412 specification cargo tanks to equip them with an internal agitation system driven by a power source located outside the cargo tank. Your letter suggests that you are considering manufacturing new cargo tanks equipped with the internal agitation system rather than modifying existing cargo tanks. You should be aware that MC 307 and MC 312 specification cargo tanks have not been authorized for new construction since August 31, 1995 (see § 180.405(b)). The design and construction requirements for DOT 407 and DOT 412 specification cargo tanks are in § 178.345 of the HMR. The regulations do not prohibit a design of the type you describe. Each cargo tank motor vehicle design type must be approved by a Design Certifying Engineer (see § 178.320(b)). In addition, each finished cargo tank motor vehicle must be inspected by an Authorized Inspector or a Registered Inspector, as applicable (see § 178.345-1(e)). Generally, MC 307, MC 312, DOT 407, and DOT 412 specification cargo tanks are authorized for bulk shipments of flammable liquids, including waste flammable liquids. Packaging requirements for bulk quantities of a specific hazardous material can be found in column 8(C) of he Hazardous Materials Table in 8 172.101 of the HMR. You should consult the section of th HMR referenced in column 8(C) for the specific hazardous material you are transporting for the packagings authorized for transportation and any special requirements that also apply. 000010 178.345#

Page 2Subpart B - Preparation of Hazardous Materials for Transportation. Additional requirements for transporting bulk quantities of hazardous materials are in Part 173, this office. I hope this information is helpful. If you have further questions, please do not hesitate to contact Sincerely, Th orn t. Allan Thomas G. Allan Senior Transportation Regulations Specialist Office of Hazardous Materials Standards#

Page 3.. gorsky File: 178.345 Ref. No. O0-OCjIC: Transport Sumter October 29, 1999 Mr. Edward Mazullo U.S. Department of Transportation Director of Standards Washington, DC 20590 J.S. Dot 400 7* Street S. W Dear Mr. Mazullo: We are considering having some tank trailers built that will be equipped with an internal My question is whether this proposed application would meet the specifications as per the Code of Federal Regulations for the following code tankers: 1.) MC 307 Tankers 2:) MC 407 Tankers 3.) ASME 312 Tankers 4.) ASME 412 Tankers We also are especially interested in how this may apply to the transportation of hazardous waste flammable liquids on the United States highways. I would appreciate an early response, as we need guidance on several pending business expansion deadlines in the transportation business. I can be reached by telephone at 1-800-479-7496 should you need to speak to me. Thank you for your time and response to this inquiry. Sincerely, all demish SWR/jk Scott W. Rumph PO Box 1060 Sumter SC 29151 • 170 S Lafayette Drive Sumter SC 29150 • T/803.775.1002 • F/803.773.1873#