The Highland Park pool is expected to reopen today after a chlorine leak closed it Thursday.
Workers were moving canisters of chlorine around noon when a valve of the chlorine tank was dislodged, causing the leak.
“It was a malfunction of the canister. They were moving it. [The top] somehow snapped,” Pittsburgh Operations Chief Guy Costa said.
The pool opens to the public at 1 p.m.
No one was hurt in the incident and no one was in the pool, although four employees were in the pool area at the time.
Emergency crews tightened the valve with hand tools and the city parks department had a company come out to remove the tank, Pittsburgh Fire Chief Darryl Jones said.
The city's hazardous materials team was called to the scene.
Tony Pizon, chief of medical toxicology at UPMC, said chlorine can be lethal in cases of severe exposure, which is why it has been used as a chemical warfare agent. But for severe irritation to occur, typically a bigger leak is necessary, combined with a longer exposure.
"If it's a small leak, I wouldn't expect anything severe," he said.
First Published June 20, 2014 12:00 AM