$10$ pts $-$ Estimated time $(5-7$ minutes$)$

A bar screen is used to remove the coarse suspended solids from influent wastewater. The design flowrate for the WWTP is $27648\frac{m^3}{d}.$ Approach velocity in the screen channel $(v_{\text{a}\text{p}\text{p}})$ is $0\mathrm{.}3\frac{m}{s}$ and flow$-$through velocity of the clean screen $(V_{scr})$ is $0\mathrm{.}75\frac{m}{s}.$ The maximum headloss allowed in the screen channel is $0\mathrm{.}25m.$ Calculate the maximum clogging allowed $(\%$ clogging$)$ before the screen needs to be cleaned