{"operation":"document","citation":"06-0283","title":"ISOTECH Laboratories, Inc. — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2007-04-03","effective_on":null,"summary":"06-0283 response to ISOTECH Laboratories, Inc. concerning 173.11, 173.116, 173.133, 173.22.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-06-0283.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-06-0283.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-06-0283","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2006/060283.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department\nof Transportation\nWashington, D.C. 20590\n400 Seventh Street, S.W.\nPipeline and\nAdministration\nHazardous Materials Safet\nAPR 3\n2007\nMr. Dennis Coleman\nISOTECH Laboratories, Inc.\nPresident\nRef. No. 06-0283\nChampaign, IL 61821-1826\n1308 Parkland Court\nDear Mr. Coleman:\nmixture of natural gas containing a hydrogen sulfide (HS) concentration level not\nThis responds to your letter dated December 21, 2006 regarding whether a sample\nexceeding 14% (on a molar basis) may be transported by all modes of transportation\nwithout labeling the sample toxic inhalation hazard.\nIsotech Laboratories, Inc. (Isotech) analyzes natural gas samples for commercial\ncontaining small amounts of HS. Based on your review of the Class 2 assignment of\nconsumers located in the United States and abroad. Samples are shipped to Isotech\nhazard zones in §173.116(a) and your calculations according to §173.133(b)(1), you\ndetermined that the concentration level of HS in a mixture of natural gas could reach\n14% (on a molar basis) before being considered toxic-by-inhalation and requiring a 2.3\n(Poison Gas) label. Specifically, you ask whether your calculated concentration level is\nH›S concentration not exceeding 14% (on a molar basis) classed as Division 2.1\ncorrect; thus, allowing Isotech and its customers to ship natural gas samples containing an\n(Flammable Gas) and not Division 2.3 (Poison Gas), which is toxic-by-inhalation,\nrequiring display of a POISON GAS label.\nUnder the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180), it is a\nshippers responsibility to classify a hazardous material (See §173.22). This Office does\nprovided, it is our opinion that a sample mixture of natural gas containing a hydrogen\nsulfide (H,S) concentration level not exceeding 14% (on a molar basis) may be\n173.11 (a)\n173.22\n173.116\n060283\n173133(6)(1)\n\n<<<PAGE 2>>>\n\ntransported by all modes of transportation as a Division 2.1 (Flammable Gas) material\nwithout labeling the sample toxic inhalation hazard.\nI hope this satisfies your inquiry. If we can be of further assistance, please contact us.\nSincerely,\nPantone f\nChief, Standards Development\nOffice of Hazardous Materials Standards\n\n<<<PAGE 3>>>\n\nEngrum\n$172.701\nAlISOTECH\n$ 173.115\n§173.114\nwww.isotechlabs.com\nmail@isotechlabs.com\nIsotech Laboratories, Inc. 1308 Parkland Court Champaign, IL 61821-1826\nTelephone 217/398-3490 FAX 217/398-3493\nDecember 21, 2006\nApplicability\n06-0283\nVia UPS Next Day Air\nOffice of Hazardous Material Standards\nAttn: PHH-10\nPipeline and Hazardous Materials Safety Administration\n400 7th Street, S.W.\nU.S. Department of Transportation\nWashington, D.C. 20590-001\nRe:\nPermissible Non-toxic Hydrogen Sulfide Concentrations\nDear Sir or Madam:\nconsumers located in the United States and abroad.! Isotech seeks PHMSA's confirmation that\nIsotech Laboratories, Inc. ('Isotech\") analyzes natural gas samples for commercial\na sample mixture of natural gas containing a hydrogen sulfide (\"H¿S\") concentration level not\nexceeding 14% (on a molar basis) may be transported on all modes of transportation without\nlabeling the sample as a toxic inhalation hazard.\nreviewed the HAZMAT regulations and noted that HS, in its pure form and at specific\nOn occasion, samples are shipped to Isotech containing small amounts of HaS. We\nrequire 2.3 labeling as a toxic inhalation hazard.? We then set out to determine what\nconcentration levels, is considered a division 2.3 gas poisonous by inhalation and thus would\nconcentration of HS would be permissible for transport, without 2.3 labeling, under all modes\nof transportation, assuming the quantity limitations of 49 CFR $172.101 columns 9(A), 9(B), and\n10 were met. Based on our review of the Class 2 assignment of hazard zones (§173.116(a)) and\nour calculations per 49 CFR §173.133(b)(1), we determined that the concentration level of H_S in\nmixture of natural gas could reach 14% (on a molar basis) before being considered toxic an\nherefore, requiring class 2.3 labeling. Although we have received tentative verbal confirmatio\nfrom a PHMSA chemist that our calculated concentration level is correct, out of an abundance\nof caution we seek PHMSA's written confirmation that:\nIsotech and its customers may ship natural gas samples containing an H2S\nconcentration not exceeding 14% (on a molar basis) as Flammable Gas,\n1 See www.isotechlabs.com.\n2 See 49 CFR S§173.115, 172.416.\n\n<<<PAGE 4>>>\n\nOffice of Hazardous Material Standards\nDecember 21, 2006\nPage 2\nsample as a toxic inhalation hazard.\nClass 2.1, on all allowable modes of transportation without labeling the\nyou have any questions or require additional information, please do not hesitate to contact me\nWe thank you in advance for providing us with the above-requested confirmation. If\nat the above-listed number.\nVery truly yours,\ndie meltilina.\nPresident\nDennis D. Coleman\nİsotech Laboratories, Inc. 1308 Parkland Court Champaign, IL 61821-1826\nTelephone 217/398-3490 FAX 217/398-3493","truncated":false,"body_characters":4968}