{"operation":"document","citation":"00-0184","title":"LaRoche Industries, Inc. — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2000-07-27","effective_on":null,"summary":"00-0184 response to LaRoche Industries, Inc. concerning 177.834.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-00-0184.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-00-0184.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-00-0184","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2000/000184.pdf","body":"<<<PAGE 1>>>\n\nof Transportation\nU.S. Department\n400 Seventh St., S.W.\nWashington, D.C. 20590\nSpecial Programs\nResearch and\nAdministration\nJUL 2 7 2000\nMr. Cariton W. Hendrix\nRef. No. 00-0184\nDOT Compliance Manager\nLaRoche Industries, Inc.\n1100 Johnson Ferry Road\nAtlanta, Georgia 30342\nDear Mr. Hendrix:\nThis responds to your letter, dated June 21, 2000, concerning loading and unloading requirements\nfor cargo tanks under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180).\nSpecifically, you ask for a definition of \"liquid discharge system\"as used in § 177.834()(2).\nThe liquid discharge system of a cargo tank consists of those components downstream of the tank\nthat are used for unloading the tank. Thus, the liquid discharge system includes the valve at the\nproduct discharge outlet and all piping, flanges, valves, hoses, fittings, and connections downstream\nof the product discharge outlet. On MC 330, 331, and non-specification tanks authorized under\n§ 173.315(k), the liquid discharge system also includes the primary discharge control system and\ncomponents used for emergency discharge control, in addition to the valve at the product discharge\noutlet and all piping, flanges, valves, hoses, fittings, and connections downstream of the product\ndischarge outlet. (See § 178.337-1(g) for definitions of \"emergency discharge control\" and\n\"primary discharge control system.\") On chlorine cargo tanks, the liquid discharge system includes\nthe internal excess flow valve and the external stop, or angle, valve, in addition to all piping, flanges,\nvalves, hoses, fittings, and connections downstream of the product discharge outlet.\nI hope this information is helpful. If you have further questions, please do not hesitate to contact this\noffice.\nSincerely,\norn I Allo\nThomas G. Allan\nSenior Transportation Regulations Specialist\nOffice of Hazardous Materials Standards\n000184\n177.834\n\n<<<PAGE 2>>>\n\nLA ROCHE INDUSTRIES INC.\n1100 JOHNSON FEARY ROAD, N.E.\nATLANTA, GA 30342-1708\n(404) 851-0300\nGorsky\n3177.834\nJune 21, 2000\n00-0184\nMr. Thomas G. Allan\nSenior Transportation Regulations Specialist\nOffice of Hazardous Materials Standards\nU.S. Department of Transportation\n400 Seventh Street, S.W.\nWashington, D.C. 20590\nDear Mr. Allan:\nI have been reviewing the general requirements found in 49 CFR, 177.834 for cargo tank\nloading and unloading. 49 CFR 177.834 (i) (2) uses the term \"liquid discharge systems\"\nand I am unable to find a definition for this terminology. I contacted the HazMat\ninformation line and they were unable to assist me. Part of my uncertainty about this\nterm comes from the difference in the parameters for cargo tanks with a capacity less\nthan or equal to 3500 water gallons and those cargo tanks with a capacity greater than\n3500 water gallons. Please assist me by providing a clear definition of what constitutes a\n\"liquid discharge system\" on the different cargo tanks.\nSincerely,\nCautton lo, Hendex\nCarlton W. Hendrix\nDOT Compliance Manager","truncated":false,"body_characters":2983}