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NEWBURGH, N.Y. -- Hazmat crews cleaned up a large chlorine spill at a school in Newburgh at around 9:30 a.m. Wednesday. Fire officials said workers were changing a pump for the swimming pool at Newburgh Free Academy when a valve broke. About 150 gallons of chlorine spilled into the building.

Hazmat crews from Orange County and West Point were called in to help remove the liquid. Normally, the school would have been filled with kids, but the schedule prevented that.

"Fortunately no kids in the school, this week was spring break, so it really reduced the size of the problem here today," said Newburgh Fire Chief Michael Vatter.

Three of the maintenance workers were taken to the hospital for evaluation for chlorine inhalation.