UN/NA 1079 |
The ERG recommendations are developed for use during the initial phase of transportation incidents; they are not intended for spills at facilities.
Material Names
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Name of Material | Small Spills (from a small package or small leak) |
Large Spills (from a large package or many small packages) |
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First Isolate in all Directions |
Then Protect Downwind |
First Isolate in all Directions |
Then Protect Downwind | |||
Day | Night | Day | Night | |||
Sulfur dioxide | 300 ft | 0.4 mi | 1.6 mi | Refer to Table 3 | ||
Sulphur dioxide | 300 ft | 0.4 mi | 1.6 mi | Refer to Table 3 |
The ERG doesn't predict that large amounts of toxic-by-inhalation gases will be produced if this material is spilled in water.
UN1079 Sulfur dioxide/Sulphur dioxide: Large Spills | |||||||
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Transport Container |
First Isolate in all Directions |
Then Protect Downwind | |||||
Day | Night | ||||||
Low Wind (<6 mph) |
Moderate Wind (6-12 mph) |
High Wind (>12 mph) |
Low Wind (<6 mph) |
Moderate Wind (6-12 mph) |
High Wind (>12 mph) |
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Rail tank car | 3000 ft | 7+ mi | 7+ mi | 4.5 mi | 7+ mi | 7+ mi | 6.3 mi |
Highway tank truck or trailer | 3000 ft | 7+ mi | 3.8 mi | 3.3 mi | 7+ mi | 5.1 mi | 3.9 mi |
Multiple ton cylinders | 1500 ft | 3.4 mi | 1.5 mi | 1.1 mi | 4.8 mi | 2.6 mi | 1.8 mi |
Multiple small cylinders or single ton cylinder | 600 ft | 2.0 mi | 0.9 mi | 0.7 mi | 3.6 mi | 1.6 mi | 0.9 mi |
UN/NA | Proper Shipping Name | Hazard Class | Labels | Notes* |
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* There are three notes: (1) whether the displayed information is for domestic (U.S.) or international shipping (if neither is specifically indicated, it applies to both), (2) whether the proper shipping name must include one or more technical names of the hazardous material in parentheses, and (3) whether the hazardous material is an inhalation hazard. |
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UN | Sulfur dioxide | 2.3 | 2.3, 8 | Inhalation Hazard Zone C |
2.3 - Poisonous gas
8 - Corrosive