The following data are from a laboratory settling analysis performed on a dilute suspension

of particles. The results were obtained using a sampling tube located at a depth of $4$ feet in

$2$

a column with a total depth of $8$ feet. What overflow rate will remove $85\%$ of the particles?

Report your final answer in gal$/$ft $2/$day$.($Ans$.=18,000$ gal$/$ft$2/$day$)$

Settling time in minutes Fraction of particles

collected

$00$

$0\mathrm{.}50\mathrm{.}44$

$1\mathrm{.}00\mathrm{.}52$

$2\mathrm{.}00\mathrm{.}63$

$4\mathrm{.}00\mathrm{.}81$

$6\mathrm{.}00\mathrm{.}95$

$8\mathrm{.}00\mathrm{.}98$