Design the disinfection system for an existing pipeline and storage tank as follows: the chlorine is added to the filter effluent in a 12-inch pipe that is 400 ft long and empties into a 2 mg storage tank. flow rate is 2 mgd and you must achieve 4-log virus removal. assume ph = 7, temp = 20c and the tank is square with dimensions, l: w: h = 134: 134: 15ft you will select the chlorine residual and any internal modifications to the tank.