[Header] PHMSA - U.S. Department of Transportation - Pipeline and Hazardous materials Safety Adminis
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U.S. DOT
Office of Hazardous Materials Safety
1200 New Jersey Ave, SE
East Building, 2nd Floor
Washington, DC 20590
Special Permits
202-366-4535
Approvals
202-366-4512 - Pressure Vessel and Cylinder
202-366-4535- General Approvals
202-366-3987- Energetic Materials
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