Match a rail car, road trailer, or intermodal marking to the ERG 2024 emergency response guide. Categories are transcribed from the official identification charts on pages 10-21. Use only as a last resort - always verify from shipping papers, train consist, or dispatch first.
ERG 2024 pp. 13-15
Chemical / oil spill cleanup or hauling crude oil, water
| Body type | Spec | Typical contents | Guide |
|---|---|---|---|
| High-pressure liquefied gas tank | MC331, TC331, SCT331 | Liquefied compressed gases (e.g., LPG, ammonia) | 117 |
| Cryogenic liquid tank | MC338, TC338, SCT338, TC341, CGA341 | Refrigerated liquefied gases (cryogenic liquids) | 117 |
| Low-pressure liquid tank | DOT407, TC407, SCT307, MC307, TC307 | Toxic, corrosive, and flammable liquids | 137 |
| Corrosive liquid tank | DOT412, TC412, SCT312, MC312, TC312 | Usually corrosive liquids | 137 |
| Non-pressure liquid tank | DOT406, TC406, SCT306/406, MC306, TC306 | Flammable liquids (e.g., gasoline, diesel) | 131 |
| Explosives / emulsion tank (TC423) | TC423 | Emulsion and water-gel explosives | 112 |
| Compressed gas / tube trailer | - | Pressurized gases (e.g., air, helium, oxygen) | 117 |
| Intermodal freight container | - | General freight — bulk or non-bulk packages | 111 |
| Dry bulk cargo trailer (hopper) | - | Dry bulk cargo (oxidizers, corrosive solids, cement, plastic pellets, fertilizers) | 134 |
| Vacuum tanker | - | Chemical / oil spill cleanup or hauling crude oil, water | 137 |
| Mixed cargo / dry van | - | General freight — bulk or non-bulk packages | 111 |
| Intermodal tank (portable / ISO) | - | Liquefied compressed gases, refrigerated liquefied gases, solids and liquids | 117 |