Hours before kids enter the municipal swimming pool each day, lifeguards and the pool manager are there to clean up, re-stock and continue training.The lifeguard’s day begins at 8 a.m. – five hours before the pool’s 1 p.m. opening. It doesn’t end until after the 6 p.m. closing time.“We come in the morning,” said lifeguard Aracely Dominguez, age 16. “It’s getting the pool ready.”Lifeguards clean the pool with a machine that picks up dirt that has accumulated on the bottom. They skim the water’s top for any grass or leaves, and add chemicals to the pool when needed. They’re also ...