A hazardous materials situation at Oakwood Country Club, Lynchburg, Va. drew a heavy response from Lynchburg Fire & EMS after chlorine spilled from a burst valve, authorities said.

According to the Lynchburg News and Advance, Fire and EMS crews evacuated about 30 people from the country club, said David Walton, a lifeguard at the country club’s pool.

Walton said he and two other lifeguards were in the process of closing the pool, which included adding chlorine into a valve to be released into the pool, when a valve burst. Walton estimated the pool itself lost about 20,000 gallons of water. He said no one at the country club was in the pool at the time.