Prob. $2.$ Streeter Phelps The Big Bear town council has asked that you determine whether the discharge of the town's wastewater into Salmon River will reduce the DO below the state standard of $5\mathrm{.}00m\frac{g}{L}$ at Alitlebit, $5\mathrm{.}79km$ downstream, or any other point downstream. The pertinent data are as follows:

$\backslash$table$[[,\backslash$table$[[$Big bear$],[$wastewater$]],\backslash$table$[[$Salmon$],[$River$]]],[$Flow$,\frac{m^3}{s},0\mathrm{.}28,0\mathrm{.}877],[$Ultimate BOD at $28C,m\frac{g}{L},6\mathrm{.}44,7],[DO,m\frac{g}{L},1,6],[K_s$ at $28C,d^{-1},\frac{N}{A},0\mathrm{.}199],[K_r$ at $28C,d^{-1},\frac{N}{A},0\mathrm{.}370],[$Speed$,\frac{m}{s},\frac{N}{A},0\mathrm{.}65],[$Temperature$,23C,28C$