City lifeguards have been getting nothing but bad press these days, but yesterday afternoon at a pool in Queens they came to the rescue of a young girl who was being sexually assaulted. Lifeguards at Fisher Pool in East Elmhurst were quick to respond when 20-year-old Julio Ajpacaja jumped in what locals call "a kids pool" around 4:30 and began groping a 13-year-old girl, asking her if she "wanted to play." Ajpacaja was pulled out and the cops were called in, eventually charging him with forcible touching and endangering the welfare of a child. Paramedics examined the girl at the scene and witnesses say she was visibly shaken, but not seriously injured. One witness told WCBS 2, "That's sick, that's nasty, a grown man … what are you doing messing around with little kids?"