$3-10$ A treatment plant is planned to be installed in a recreational resort that contains a developed campground for $200$ persons, lodges and cabins for $100$ persons, and resort apartments for $150$ persons. Assume that persons staying in lodges use the dining hall for $3$ meals per day and that a $50-$seat cafeteria with $4$ employees and an estimated $200$ customers per day has been constructed. Daily attendance at the visitor center is $500$ persons. Other facilities include a $10-$machine laundromat, a $20-$seat cocktail lounge, and three gas stations per station$).$ Determine the average wastewater flowrate in $\frac{L}{d}$ using the unit flows assuming the housing facilities are at maximum capacity.

$190$

Chapter $3$ Wastewater Flowrates and Constituent Loadings

Table $3-3$

Typical wastewater flowrates from commercial sources in the United States ${?}^a$

$\backslash$table$[[$Source$,$Unit,Flowrate, gal$/$unit$.$d$,$Flowrate, L$/$unit$.$d$],[$Range$,$Typical,Range,Typical$],[$Airport$,$Passenger,$2\mathrm{.}4-3\mathrm{.}8,3,9-14,11],[$Apartment$,$Person,$32-45,38,120-170,145],[$Automobile service station,Vehicle served,$6-11,8,23-42,30],[$Employee$,7-11,10,26-42,38],[$Bar$/$cocktail lounge,Seat,$8-15,11,30-57,43],[$Employee$,8-12,10,30-45,37],[$Boarding house,Person,$20-45,30,76-170,115],[$Conference center,Person,$5-8,6,20-30,24],[$Department store,Toilet room,$280-450,300,1000-1700,1100],[$Employee$,6-11,8,23-42,30],[$Hotel$,$Guest,$52-56,53,200-215,200],[$Employee$,6-11,8,23-42,30],[\backslash$table$[[$Industrial building$],[($sanitary waste only$)]],$Employee,$12-26,15,45-98,60],[$Laundry $($self$-$service$),$Machine,$320-413,338,1210-1560,1280],[$Load$,36-41,38,136-155,145],[$Mobile home park,Unit,$100-113,105,380-430,400],[$Motel $($with kitchen$),$Guest,$36-60,38,135-230,145],[$Motel $($without kitchen$),$Guest,$32-53,34,120-200,130],[$Office$,$Employee,$6-12,10,23-45,38],[$Public lavatory,User,$2\mathrm{.}4-3\mathrm{.}8,3,9-14,12],[$Restaurant:$],[$Conventional$,$Customer,$6-8,6,23-30,24],[$With bar$/$cocktail lounge,Customer,$6-9,7,23-34,26],[$Shopping center,Employee,$6-10,8,23-38,30],[$Parking space,$0\mathrm{.}8-2\mathrm{.}3,1\mathrm{.}5,3-9,6],[$Theater $($Indoor$),$Seat,$1\mathrm{.}6-3,2\mathrm{.}3,6-11,9]]$

"Adapted in part from Tchobanoglous et al$.(2003).$

about conservation have installed such devices on their own as a means of reducing water consumption. New designs in front$-$loading clothes washers also offer significant reductions in water use, on the order of $50$ to $75$ percent of older models. A comparison of residential interior water use $($and resulting per capita wastewater flows$)$ is given in Table $3-9$ for homes with the current levels of conservation and with extensive water conserving appliances and fixtures. The potential savings of employing selected waterefficient devices is illustrated in Example $3-1.$

$3-1$ Wastewater Sources and Flowrates

$193$

$\backslash$table$[[\backslash$table$[[$Table $3-7],[$Typical distribution of$],[$residential indoor$],[$water use in the$],[$United States ${?}^a$