FRANKFORT, Ky. (WDRB) -- A state office building Frankfort is expected to reopen on Tuesday, after it was evacuated early Monday because of a chemical leak.

Franklin County Sheriff Pat Melton tells WKYT that anhydrous ammonia was leaking at the Kentucky Department for Libraries & Archives building on Coffee Tree Lane.

Employees reported the chemical smell before they were evacuated. About 40 people were kept 330 feet from the building, as crews worked. 

The Frankfort Fire Department said the smell was from a chemical used in photography projects at the archives.  The leak was contained to one room.  The leak was from a canister that was already scheduled to be picked up. 

Crews ventilated the building by reversing air flow through the heating and air conditioning vents.

Pamela Trautner of the Finance and Administration Cabinet says the building will be monitored overnight, and employees will likely return tomorrow.

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