As crews were about to kick off the weekend, Companies were alerted to the Boyce Park Wave Pool in District 5 for a reported chemical spill with several patients exposed. C-50 arrived on scene to find the 1,000 gallon tank of liquid Chlorine had an issue causing a leak and splashing one individual. This patient was evaluated by EMS and released. Crews from Tanker 5, Quint 1 and Truck 4 entered the area and surveyed the damage to the tank and awaited County HazMat 440 for additional resources. Crews remained on scene for approximately 2.5 hours.