The average daily wastewater flow for a city is 17.6 L/s, the peak hourly rate is 28.4 L/s, and the minimum hourly rate is 7.1 L/s. Design a rectangular-cross-section grit chamber with a proportional weir outlet to control flow. Assume the grit particle to be removed has a settling velocity of 2.3 cm/s and that the chamber flow-through velocity is to be maintained at approximately 0.3 m/s. You can assume the grit chamber will be 30 cm wide and that the weir coefficient, CW, for the proportional weir is 0.98. The proportional weir equation does not have a solution at h = 0, which is the bottom of the weir. You can set the bottom width as that determined for h = 1 cm. In other words, your weir will have vertical sides between h = 0 and h = 1 cm.