{"operation":"document","citation":"ERG 2024 Guide 174","title":"Guide 174: Adsorbed Gases - Flammable or Oxidizing","source_type":"guidance","agency":"U.S. DOT / Transport Canada / SICT","status":"guidance","official":true,"published_on":"2024-04-04","effective_on":null,"summary":"ERG2024 response Guide 174: Adsorbed Gases - Flammable or Oxidizing.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-erg-2024-guide-174.json","markdown":"https://regulus.evalyn.ai/document/phmsa-erg-2024-guide-174.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-erg-2024-guide-174","source_url":"https://www.phmsa.dot.gov/erg/guide?number=174","body":"GUIDE\n174\nAdsorbed Gases - Flammable or Oxidizing\nPOTENTIAL HAZARDS\nFIRE OR EXPLOSION\n•\nSome gases will be ignited by heat, sparks or flames.\n•\nSubstance does not burn but will support combustion.\n•\nVapors may travel to source of ignition and flash back.\n•\nCylinders exposed to fire may vent and release flammable gas through pressure relief devices.\n•\nContainers may explode when exposed to prolonged direct flame impingement.\n•\n•\n•\n•\nHEALTH\nVapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.\nSome may be irritating if inhaled at high concentrations.\nContact with gas may cause burns and injury.\nFire may produce irritating and/or toxic gases.\nPUBLIC SAFETY\nCALL 911. Then call emergency response telephone number on shipping paper. If shipping paper\nnot available or no answer, refer to appropriate telephone number listed on the inside back cover.\nKeep unauthorized personnel away.\nStay upwind, uphill and/or upstream.\nMany gases are heavier than air and will spread along the ground and collect in low or confined areas\n(sewers, basements, tanks, etc.).\nVentilate closed spaces before entering, but only if properly trained and equipped.\n•\n•\n•\n•\n•\nPROTECTIVE CLOTHING\n•\nWear positive pressure self-contained breathing apparatus (SCBA).\n•\nStructural firefighters' protective clothing provides thermal protection but only limited chemical protection.\nEVACUATION\nImmediate precautionary measure\n•\n•\n•\nIsolate spill or leak area for at least 100 meters (330 feet) in all directions.\nLarge Spill\nConsider initial downwind evacuation for at least 800 meters (1/2 mile).\nFire\nIf several small packages (inside a railcar or trailer) are involved in a fire, ISOLATE for 1600 meters\n(1 mile) in all directions; also, consider initial evacuation for 1600 meters (1 mile) in all directions.\nPage 278\nERG 2024\n\nAdsorbed Gases - Flammable or Oxidizing\nGUIDE\n174\nEMERGENCY RESPONSE\nFIRE\n•\nDO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED.\n•\nUse extinguishing agent suitable for type of surrounding fire.\nSmall Fire\n•\nDry chemical or CO2.\nLarge Fire\n•\nWater spray or fog.\n•\nIf it can be done safely, move undamaged containers away from the area around the fire.\n•\nDamaged cylinders should be handled only by specialists.\nFire Involving Several Small Packages (inside a railcar or trailer)\n•\nFight fire from maximum distance or use unmanned master stream devices or monitor nozzles.\n•\nCool containers with flooding quantities of water until well after fire is out.\n•\nDo not direct water at source of leak or safety devices.\n•\nWithdraw immediately in case of rising sound from venting safety devices or discoloration of tank.\n•\nALWAYS stay away from tanks in direct contact with flames.\n•\nFor massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible,\nwithdraw from area and let fire burn.\nSPILL OR LEAK\n•\nFor flammable gases, ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from\nimmediate area.\n•\nFor oxidizing substances, keep combustibles (wood, paper, oil, etc.) away from spilled material.\n•\nAll equipment used when handling the product must be grounded.\n•\nDo not touch or walk through spilled material.\n•\nStop leak if you can do it without risk.\n•\nUse water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact\nspilled material.\n•\nDo not direct water at spill or source of leak.\n•\nPrevent spreading of vapors through sewers, ventilation systems and confined areas.\n•\nVentilate the area.\n•\nIsolate area until gas has dispersed.\nFIRST AID\nRefer to the “General First Aid” section.\nSpecific First Aid:\n•\nIn case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove\nclothing if adhering to skin.\n•\nIn Canada, an Emergency Response Assistance Plan (ERAP) may be required for this product.\nPlease consult the shipping paper and/or the \"ERAP\" section.\nERG 2024\nPage 279","truncated":false,"body_characters":3959}