Charlottetown fire chief Randy MacDonald said there was a small acetone leak at the BioVectra facility on Aviation Avenue Saturday evening.

MacDonald said firefighters responded to a general alarm and found there had been an escape of acetone from one of the chemical storage tanks.

"The acetone that had escaped was contained in the containment area and was cleaned up by staff," said MacDonald. "Acetone is a flammable liquid."

"There is risk to it but this situation itself was no risk to the public because it was a small quantity and was effectively dealt with."

MacDonald said the plant was evacuated for about an hour. 

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MacDonald noted his department is working with the BioVectra staff to prevent it from happening again, mainly looking at the design of the piping.

BioVectra officials said they agree with fire officials' assessment, and said the company has cooperated with the fire chief's team and will continue to do so.