2. An ocean outfall diffuser that discharges treated wastewater into the Pacific Ocean is 5000 m from a public beach. The wastewater contains 103 coliform bacteria per millimeter. The wastewater discharge flow rate is 0.5 m³/s. The coliform first- order death rate in seawater is approximately 0.5 h^-1. The current carries the wastewater plume toward the beach at a rate of 0.3 m/s. The ocean current may be approximately as a pipe carrying 600 m³/s of seawater. Determine the coliform concentration at the beach. assume that the current behaves as a plug floe reactor and that the wastewater is completely mixed in the current at the discharge point