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Incident in the Cannon Building

Saturday, October 31, 2015

During the Cannon Renewal construction, there was a potential release of asbestos that may have affected the Cannon Building.

The Architect of the Capitol continues to investigate and will provide updates when available.


Most recent update appears first.

Saturday, October 31, 2015

  • 11:18 p.m. — The Cannon House Office Building has been reopened. Engineers and certified industrial hygienists assessed the situation and an independent, accredited lab performed a rigorous air sampling analysis. The building is safe to reopen; air sample results were well below the regulatory limit for general space occupancy. AOC ordered the evacuation of the building late on Friday, October 30, to investigate a potential release of asbestos. There were no injuries associated with this event.

    For more information about asbestos, please visit the Environmental Protection Agency's website.
  • 5:25 p.m. — The Cannon Building remains closed. We continue to await results of the air sampling by an independent, accredited lab. We appreciate the continued patience of the congressional community.
  • 7:42 a.m. — Additional air sampling has come back negative. In an abundance of caution, air samples will undergo further analysis by an independent, accredited lab. The building remains closed. 

Friday, October 30, 2015

  • 10:56 p.m. — Preliminary air sampling has come back negative. The building will remain closed as sampling continues.
  • 8:19 p.m. — Engineers and certified industrial hygienists are evaluating the scene to determine the appropriate response to this incident. In an abundance of caution, the Cannon Building will be closed until further notice.