GREENBURGH, N.Y. – The cause of a toxic chlorine gas leak at a Knollwood water-pumping station over the weekend is under investigation by Greenburgh officials.
“We have some more homework and internal questions we want to resolve,” Greenburgh Commissioner of Public Works Victor Carosi told the town board Tuesday during a work session.
Just after 11 a.m. Sunday, an equipment malfunction sent 5 pounds of chlorine vapors into the air, according to Carosi. Emergency responders from three departments responded to the call and capped the leak about two hours later.
The plant operator, who was not identified, was taken to the hospital after complaining of slight discomfort but was released later that day, he said Tuesday.
Although a small amount of gas escaped the plant, readings showed it was not at a dangerous level and quickly dissolved. Readings inside the plant also showed a small concentration of the gas, but it was well below the normal alarm limits, Carosi said.
Workers later determined a chlorine regulator, a device that controls the amount of choline gas used to disinfect water, was the source of the leak. However, emergency backup systems kept water levels normal, Carosi said.
“At no time was disinfection of water a concern,” he said.