1. A treatment plant has three primary clarifiers at 60 ft in diameter with side water depths of 9 ft.The length of the weirs is 54 ft. The average daily flow is 4.6 MGD and the peak flow is 8.7 MGD.Calculate the overflow rates, detention times, and weir loading rates. Using the calculations, determine if the clarifiers are adequately sized. o Calculate the overflow rates if one of the units is out of service for maintenance.

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