E$.$ Preliminary Treatment:

E$\mathrm{.}1.$ An aerated grit chamber is designed for a WWTP receiving

an average daily flow of $10$ MGD$.$ Assume two grit chambers

operate in parallel with a detention time of $5$ minutes at peak

flow. The peak hour flow is three times the daily average. Use

the design criteria provided in your textbook in Table $7\mathrm{.}8$

$($page $344)$ to determine the length, width, and depth in feet.

Constraints at the plant require minimized tank depth and

length to width ratio.