| 21. | Hazardous material experts were working to contain the leak, he said.
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| 22. | -- Security requirements for trucks that carry hazardous materials are weak.
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| 23. | The Houston Fire Department Hazardous Materials team has also been notified.
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| 24. | They can work underwater, in confined spaces and with hazardous materials.
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| 25. | Hazardous material crews were searching for the source of the fumes.
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| 26. | Explosives and other hazardous materials are not allowed in the tunnels.
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| 27. | Installed in a plane, the generators are not considered hazardous material.
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| 28. | Hazardous materials and munitions transport by rail is being tightly monitored.
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| 29. | Police pull over truckers hauling hazardous materials to check their papers.
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| 30. | About 20 percent of those carry hazardous materials, he said.
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