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• Sizing of Pump Station <br /> l. Detcrminc Surfacc Arca T <br /> Width <br /> Rectanglc=Ama=L x W 1 <br /> x = square feet ��s� <br /> Circle=Area=n x(Radius� <br /> 3.14 x x = square feet Radius <br /> a=3.14 <br /> Other=Get Surface Area from Manufacturer <br /> square feet <br /> 2. Calculate Gallons Per lnch <br /> There aro 7S gallons per cubic foot of volumc,thcrcforc you must multiply the arca <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Ama x 7.5 gpft'+12 inchs per foot � <br /> x 7.5+12 =�gallons/inch ��lE r/�ia.�C I�.lc't.,.�d�/. � <br /> 3. Calculate Gallons to Cover Pump(with 2 i�uhes c�f watcr covcring pump) ��imatccl Scwage Flows in Gallons per day <br /> (Height(in)+2 inches) x gallons/inch(�i2) um r Cg�} <br /> (�_+ z�x Z�_=Z¢O gallons of Type I Typc II Typc I!I Ty pc <br /> Bcdrooms 1 V <br /> 4. Calculate Total Pumpout Volume 2 300 22S 180 <br /> a. To maximize pump lifc select sump size for 4 to 5 pump operations per day. 3 450 300 218 � <br /> �r u,� <br /> ��+4= /I�_gallons per dose 4 600 375 256 �,i�a <br /> b. Calculate drainback 5 750 450 294 ;,, <br /> 1. Determine total pipe length,�O feet. 7 1050 600 370 7��� <br /> uw <br /> 2. Determine liquid volume of pipe,�j�gallons}xr 1(�fectr---._ 8 1200 675 408 �,n,,,,,� <br /> 3. Multi ly length b volume: Drainback quantity= d� <br /> �fcet x�gallons/100 ft.= allons. �gal(� <br /> p• + � \ Pi diameta inches C�iluns r 100 f�� <br /> c. Total pump out volume equals dose volume+drainhack 1 4.4 <br /> //3 �allons per dose+ $ gallons= �Z gallons 1.25 7.77 <br /> 1.5 10.58 <br /> 5. CalculaM Volume for Alarm(typicaily 2 to 3 inches) 2 17.43 <br /> Depth(in)x gallons/inch(#2)= 2.S 24.87 <br /> Z.b x Z =��gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75%the daily flaw) <br /> Daily flow(see page D-7)x.75= <br /> �O x.75=�.�,gallons <br /> Reserve Capaciry <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallans alarn�+gallons mserve capcity <br /> #3+#i4 c+#5+#6 3� „73� <br /> Z�Q+�_+�O +_�= gallons A� <br /> Pump On <br /> 8. Total Depth (Total gallon divided by gallon per inch) <br /> Total Gallon(#�+�allon/inch(#2) <br /> ��+ Z O =�Z inches Pum OfF To 1 Pumpout�lumc <br /> P <br /> Pump Hcight <br /> 9. Float Separafion Distance(equai total pumpout volumc) <br /> Total pumpout volu (#4c)+gallons/inch(#2) � <br /> ��+�0 =�inches . <br />