A second man has drowned this summer while swimming at a lake on private property at at former mining site in Manchester in Ocean County. Victor Arias-Peralta, 18, was swimming in the quarry at the Heritage Mineral property at about 6 p.m. Monday when he grew tired about 20 yards off shore, Manchester police said. Arias-Peralta disappeared under the water a short time later and was swept away in the current, officials said. The Perth Amboy resident was pulled from the water after a 45-minute search by police, firefighters and a State Police helicopter. Authorities have ruled the drowning accid…