A wastewater treatment plant has four primary clarifiers, eachwith diameter of 15 m and side water depth of 4 m. The averagedaily flow is 24,000 m3/d. The effluent weir is located onthe periphery of each tank. Calculate the surface overflow rate,detention time, and weir loading rates. If one tank is taken out ofservice for maintenance, what happens to the overflow rate anddetention time? Is the design adequate for the average flow withthe three tanks in service?