CITY HALL — The Island’s Olympic size swimming pools, intermediate size pools, and some beaches will remain open through Sept. 9 this summer, the city’s Parks Department said. The extension marks the second year the city has agreed to extend the days city pools and beaches are open. Outdoor pools opened on June 27, and beaches opened on May 26. Last year, two beaches and four public pools on Staten Island opened through Sept. 10. The Parks Department said the extension of the swimming season past Labor Day was made permanent by law. The city gave $1.7 million this year for an additional week of operation, the agency said. The Parks Department could not immediately say which beaches on Staten Island will be extended and said the extension is based on staff availability. INDOOR POOL COMING Staten Island is the only borough without a public indoor pool — a facility the Island is on track to getting soon. The city recently set aside $100 million to build a new swimming pool on Staten Island. Outdoor pools are open daily from 11 a.m. through 7 p.m. with a break for pool cleaning at 3 p.m. through 4 p.m. Although outdoor pools will remain open until Sept. 9, mini-pools will close on Labor Day, Sept. 3. Swimming is off limits when lifeguards are not on duty and in closed sections marked with signs and red flags.