$5\mathrm{.}15$ For the community described in Problem $5\mathrm{.}14,$ assume that the treatment plant capacity in

$2000$ was $35$ mgd $.$ If the water use rate in $2015$ is $140$ gpcd $,$ will expanded treatment facili$-$

ties be needed by $2015?$ In about what year would they be needed if so$?$ What reduction in

water use rate would be needed to delay the need for new facilities until $2015?$ Is a reduc$-$

tion of this magnitude attainable?

$12\mathrm{.}19$ A dairy that processes about $250,000lb$ of milk daily produces an average of $65,100gpd$ of

wastewater with a BOD of $1400m\frac{g}{l}.$ The principal operations are bottling milk and mak$-$

ing ice cream, with limited production of cottage cheese. Compute the flow and BOD per

$1000$ lb of milk received, and the BOD and hydraulic equivalent populations of the daily

wastewater discharge.We