Leak came from tank used to treat swimming pool in facility.
Blaze was reported around 1:40 p.m. Saturday.
The marker was placed at the site of King-Quale Elevator fire, now ProMedica Headquarters.
Erie Street at Adams had been closed Thursday morning.
Capt. James Fraser died in 1894 during a large fire in Toledo.
Children’s activities, tour of Toledo Firefighters Museum planned.
Accident involving gas main occurred shortly after noon Monday.