Using the Limestone Contactor Water!Pro program, determine the following:

Develop a limestone bed design graph that relates limestone particle diameter $(0\mathrm{.}5,1\mathrm{.}0,$ & $1\mathrm{.}5$ cm$)($x$-$

axis$)$ versus limestone bed depth $($y$-$axis$)$ for $3$ different superficial velocities $(3,5,$ & $7$ gpm$/$ft$2).$ Use

the following parameters in your design consideration: TDS $400$ mg$/$l$,$ pH $7\mathrm{.}0,$ total alkalinity $40$ mg$/$l as

CaCO$3,$ calcium $10$ mg$/$l as Ca$2+,$ water temperature $25$oC$,$ limestone porosity $0\mathrm{.}42,$ sphericity $0\mathrm{.}80,$ mass

$\%$ of limestone particles $95,$ limestone $=17\mathrm{.}1$ mg$/$l based on $100\%$ exposed surface area, and a target pH

$8\mathrm{.}37.$ Assume CO$2$ of $7\mathrm{.}0$ mg$/$l$.$