Complex sentence: Due to the school's age, and the infrastructure design in many older buildings around the St. George Area, Penshurst Girls does have a sewage problem, with sewage overflowing onto the school playground close to seating areas in the Year 9 and 10 playground.
Split into simpler sentences: Due to the school's age, and the infrastructure design in many older buildings around the St George Area, Penshurst Girls does have a sewage problem. With sewage overflowing on to the school playground close to seating areas in the Year 9 and 10 playground.