Former DWP chief David Nahai would be paid up to $27,300 a month from Oct. 7 through Dec. 31 to "provide consulting services and provide knowledge transfer" about the job — and he has to be available on-call during work hours. His interim successor, S. David Freeman, called the deal essential: "There is information that only he has that I will need to help me to manage this department." Meanwhile: The City Council rejected a hike in water rates. LAT, DN