This is an online version of the 2004 ERG (Emergency Response Guidebook) which is produced by the USDOT for first responders during the initial phase of a Dangerous goods/Hazardous Materials incident. Have you ever wondered what those four digit numbers on the placards on the side of trucks and rail cars mean? Our online 2004 ERG will give you your answer.
| Isolation and Protective Action Distances Table | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SMALL SPILLS | LARGE SPILLS | ||||||||||||
| UN# | Name of Material | First ISOLATE in all Directions | Then PROTECT Persons Downwind During- | First ISOLATE in all Directions | Then PROTECT Persons Downwind During- | ||||||||
| Day | Night | Day | Night | ||||||||||
| m | ft | km | mi | km | mi | m | ft | km | mi | km | mi | ||
|
Please see: How to use the table of initial isolation and protective action distances | |||||||||||||
| 1583 | Chloropicrin mixture, n.o.s. | 60 | 200 | 0.4 | 0.3 | 0.8 | 0.5 | 210 | 700 | 1.9 | 1.2 | 3.6 | 2.2 |
| 1589 | CK (when used as a weapon) | 60 | 200 | 0.7 | 0.4 | 2.5 | 1.5 | 420 | 1300 | 4.1 | 2.5 | 8.1 | 5 |
| 1589 | Cyanogen chloride, inhibited | 60 | 200 | 0.6 | 0.4 | 2.8 | 1.8 | 450 | 1400 | 4.3 | 2.7 | 10.1 | 6.3 |
| 1589 | Cyanogen chloride, stabilized | 60 | 200 | 0.6 | 0.4 | 2.8 | 1.8 | 450 | 1400 | 4.3 | 2.7 | 10.1 | 6.3 |
| 1595 | Dimethyl sulfate | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 60 | 200 | 0.5 | 0.3 | 0.8 | 0.5 |
| 1595 | Dimethyl sulphate | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 60 | 200 | 0.5 | 0.3 | 0.8 | 0.5 |
| 1605 | Ethylene dibromide | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 30 | 100 | 0.3 | 0.2 | 0.6 | 0.4 |
| 1612 | Hexaethyl tetraphosphate and compressed gas mixture | 90 | 300 | 0.8 | 0.5 | 2.7 | 1.7 | 360 | 1200 | 3.5 | 2.2 | 8.1 | 5.1 |
| 1613 | Hydrocyanic acid, aqueous solution, with not more than 20% Hydrogen cyanide | 30 | 100 | 0.2 | 0.1 | 0.2 | 0.1 | 120 | 400 | 0.5 | 0.3 | 1.3 | 0.8 |
| 1613 | Hydrogen cyanide, aqueous solution, with not more than 20% Hydrogen cyanide | 30 | 100 | 0.2 | 0.1 | 0.2 | 0.1 | 120 | 400 | 0.5 | 0.3 | 1.3 | 0.8 |
| 1614 | Hydrogen cyanide, anhydrous, stabilized (absorbed) | 30 | 100 | 0.2 | 0.1 | 0.6 | 0.4 | 60 | 200 | 0.5 | 0.3 | 1.7 | 1.1 |
| 1614 | Hydrogen cyanide, stabilized (absorbed) | 30 | 100 | 0.2 | 0.1 | 0.6 | 0.4 | 60 | 200 | 0.5 | 0.3 | 1.7 | 1.1 |
| 1647 | Ethylene dibromide and Methyl bromide mixture, liquid | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 30 | 100 | 0.3 | 0.2 | 0.6 | 0.4 |
| 1647 | Methyl bromide and Ethylene dibromide mixture, liquid | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 30 | 100 | 0.3 | 0.2 | 0.6 | 0.4 |
| 1660 | Nitric oxide | 30 | 100 | 0.2 | 0.1 | 0.8 | 0.5 | 60 | 200 | 0.6 | 0.4 | 2.7 | 1.7 |
| 1660 | Nitric oxide, compressed | 30 | 100 | 0.2 | 0.1 | 0.8 | 0.5 | 60 | 200 | 0.6 | 0.4 | 2.7 | 1.7 |
| 1670 | Perchloromethyl mercaptan | 30 | 100 | 0.2 | 0.1 | 0.2 | 0.2 | 60 | 200 | 0.7 | 0.4 | 1.2 | 0.8 |
| 1680 | Potassium cyanide (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 300 | 1000 | 1 | 0.6 | 3.9 | 2.4 |
| 1680 | Potassium cyanide, solid (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 300 | 1000 | 1 | 0.6 | 3.9 | 2.4 |
| 1689 | Sodium cyanide (when spilled in water) | 60 | 200 | 0.2 | 0.1 | 0.7 | 0.4 | 390 | 1300 | 1.3 | 0.8 | 4.9 | 3 |
| 1689 | Sodium cyanide, solid (when spilled in water) | 60 | 200 | 0.2 | 0.1 | 0.7 | 0.4 | 390 | 1300 | 1.3 | 0.8 | 4.9 | 3 |
| 1694 | CA (when used as a weapon) | 30 | 100 | 0.2 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.7 | 1 | 4.2 | 2.6 |
| 1695 | Chloroacetone, stabilized | 30 | 100 | 0.2 | 0.1 | 0.3 | 0.2 | 90 | 300 | 0.7 | 0.5 | 1.5 | 0.9 |
| 1697 | CN (when used as a weapon) | 30 | 100 | 0.2 | 0.1 | 0.5 | 0.3 | 120 | 400 | 1.2 | 0.7 | 3.3 | 2 |
| 1698 | Adamsite (when used as a weapon) | 60 | 200 | 0.4 | 0.2 | 1.2 | 0.7 | 180 | 600 | 2.3 | 1.4 | 5.2 | 3.2 |
| 1698 | DM (when used as a weapon) | 60 | 200 | 0.4 | 0.2 | 1.2 | 0.7 | 180 | 600 | 2.3 | 1.4 | 5.2 | 3.2 |
| 1699 | DA (when used as a weapon) | 60 | 200 | 0.4 | 0.2 | 1.2 | 0.7 | 180 | 600 | 2.3 | 1.4 | 5.2 | 3.2 |
| 1716 | Acetyl bromide (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.3 | 0.2 | 90 | 300 | 0.7 | 0.5 | 2.3 | 1.4 |
| 1717 | Acetyl chloride (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.4 | 0.3 | 120 | 400 | 1.1 | 0.7 | 3.5 | 2.2 |
| 1722 | Allyl chlorocarbonate | 30 | 100 | 0.4 | 0.2 | 0.8 | 0.5 | 210 | 700 | 2 | 1.2 | 3.8 | 2.4 |
| 1722 | Allyl chloroformate | 30 | 100 | 0.4 | 0.2 | 0.8 | 0.5 | 210 | 700 | 2 | 1.2 | 3.8 | 2.4 |
| 1724 | Allyltrichlorosilane, stabilized (when spilled in water) | 30 | 100 | 0.2 | 0.1 | 0.7 | 0.5 | 180 | 600 | 1.8 | 1.2 | 5.4 | 3.4 |
| 1725 | Aluminum bromide, anhydrous (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 90 | 300 | 0.7 | 0.4 | 2.6 | 1.6 |
| 1726 | Aluminum chloride, anhydrous (when spilled in water) | 30 | 100 | 0.2 | 0.1 | 0.7 | 0.5 | 120 | 400 | 1.2 | 0.7 | 4.5 | 2.8 |
| 1728 | Amyltrichlorosilane (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 60 | 200 | 0.5 | 0.3 | 1.9 | 1.2 |
| 1732 | Antimony pentafluoride (when spilled in water) | 30 | 100 | 0.2 | 0.1 | 0.9 | 0.6 | 180 | 600 | 1.9 | 1.2 | 5.4 | 3.4 |
| 1741 | Boron trichloride | 30 | 100 | 0.1 | 0.1 | 0.3 | 0.2 | 60 | 200 | 0.6 | 0.4 | 1.7 | 1.1 |
| 1744 | Bromine | 60 | 200 | 0.5 | 0.3 | 1.8 | 1.1 | 330 | 1100 | 3.3 | 2.1 | 7.3 | 4.6 |
| 1744 | Bromine, solution | 60 | 200 | 0.5 | 0.3 | 1.8 | 1.1 | 330 | 1100 | 3.3 | 2.1 | 7.3 | 4.6 |
| 1745 | Bromine pentafluoride (when spilled in water) | 30 | 100 | 0.2 | 0.1 | 1 | 0.6 | 240 | 800 | 2.2 | 1.4 | 6.6 | 4.1 |
| 1745 | Bromine pentafluoride (when spilled on land) | 30 | 100 | 0.4 | 0.2 | 1.4 | 0.9 | 270 | 900 | 2.7 | 1.7 | 6.9 | 4.3 |
| 1746 | Bromine trifluoride (when spilled in water) | 30 | 100 | 0.2 | 0.1 | 0.9 | 0.6 | 210 | 700 | 1.9 | 1.2 | 5.8 | 3.6 |
| 1746 | Bromine trifluoride (when spilled on land) | 30 | 100 | 0.1 | 0.1 | 0.6 | 0.4 | 180 | 600 | 1.8 | 1.1 | 4.8 | 3 |
| 1747 | Butyltrichlorosilane (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.2 | 60 | 200 | 0.6 | 0.4 | 2 | 1.3 |
| 1749 | Chlorine trifluoride | 60 | 200 | 0.4 | 0.3 | 2 | 1.3 | 300 | 1000 | 2.8 | 1.8 | 8.1 | 5.1 |
| 1752 | Chloroacetyl chloride (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 60 | 200 | 0.4 | 0.3 | 1.5 | 1 |
| 1752 | Chloroacetyl chloride (when spilled on land) | 30 | 100 | 0.3 | 0.2 | 0.5 | 0.4 | 150 | 500 | 1.4 | 0.9 | 2.6 | 1.6 |
This information was compiled from the 2004 Emergency Response Guidebook (2004 ERG) which is produced by the U.S. Department of Transportation.
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To ensure regulatory compliance when transporting hazardous materials or dangerous goods, one must receive proper training and certification from a qualified instructor and refer to the current year's Code of Federal Regulations Title 49 (49CFR) or your country's shipping regulations. In matters regarding workplace safety, refer to current OSHA regulations (29CFR) and NIOSH guidelines or your own country's health and safety regulations. No one should ever enter into a hazardous environment without proper training from qualified instructors.
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