Cleaning up broken glass, doors and graffiti and securing the U.S. Capitol after the January 6 attack will cost more than $30 million, Capitol staff told lawmakers Wednesday.

"Statues, murals, historic benches and original shutters all suffered varying degrees of damage, primarily from pepper spray accretions and residue from chemical irritants and fire extinguishers," Architect of the Capitol J. Brett Blanton said at a House Appropriations Committee Hearing, according to his prepared testimony. "This damage to our precious artwork and statues will require expert cleaning and conservation."

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His employees had just finished painting parts of the platform where President Joe Biden was set to be inaugurated on the day of the January 6 attacks, Blanton said. When rioters began storming the Capitol, his staff sheltered some Congressional employees in their workshops while other team members went to the roof of the building to reverse the airflows to clear out chemical irritants like bear repellant and pepper spray that were released inside.

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Eight different marble and granite busts of former House speakers and notable figures, as well as portraits of James Madison and John Quincy Adams and a statue of Thomas Jefferson, were among the items identified as having potential damage. That damage includes yellow residue from fire extinguisher discharge that can damage the marble. House Curator Farar Elliott asked lawmakers for an additional $25,000 to support emergency repair and conservation of damaged items.