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• � Sizing of Pump Station <br /> 1. Detcrminc Surfacc Arca T <br /> Rcctangle=Area=L x W W'��h <br /> x = square feet 1 <br /> Lcngth <br /> Cirde= Area =n x(Radius)z <br /> 3.14 x x = square feet I27(JIUS <br /> Other=Get Surface Area from Manufacturer rz=3.14 <br /> squue feet <br /> 2. Calculate Gallons Per Tnch <br /> There are 7.5 gallons per cubic foot of volume,thercfore you must multiply the area <br /> times the conversion factor and divide by 12 inches}xr foot to calculate gallons per inch <br /> Area x 7.5�pft 3+12 inchs per foot <br /> x 7.5+12 =�gallons/inch �E`/E ��g!�E �� / <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water coverin�pump) Esiimai«!Scwage Flows in Gallons per day <br /> (Height(in)+2 inchcs) x gallons/inch(#2) �g�� <br /> um r <br /> (�_+_�)x z_3 =�gallons of Type I Typc Q Type II[ Typc <br /> Iicdrooms 1 V <br /> 4. Calculate Total Pumpout Volume <br /> a. To maximize pump lifc select sump size for 4 to 5 pump operations per day. 3 450 300 218 � <br /> OD gpd+4= /S7� gallons per dose 4 600 375 256 "r`"` <br /> �y��� <br /> b. Calculate drainback 5 750 45U 294 ;,, <br /> l. Determine total i e len th � feet. 6 900 525 332 ���r���. <br /> P P g �� 7 1050 600 370 <br /> 2. Determine liquid volume of pipe,l��43 gallons per 1(x)fcYt. 8 1200 675 408 �„i;,��,,,,� <br /> 3. Multiply length by valume: Drainback quantity= <br /> �feet x !7 gallons/]00 ft. _�gallons. <br /> Pi di�meta inchcs Cyllons r 100 fkt <br /> c. Total pump out volume equals dose volume+drainback 1 4.4 <br /> lv�p gallons per dose+ 7 gallons= �S7 gallons 1.25 7.77 <br /> 1.5 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 2 17.43 <br /> Depth(in)x gailons/inch(#2)= 2.5 24.87 <br /> Z3 x �, _ ��p gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75%thc daily flow) <br /> Daily flow(see page D-7)x.75= <br /> �� x.75= �0 gallons <br /> Rcservc Capacity <br /> 7. Calculate total�alions <br /> gallons over pump+gallons pumpout+�yallons alarm+gallons mserve capcity <br /> �t3+ #4c+t�5+#6 <br /> 3z�+ ,/�+��+�= 9� gallons Alarm <br /> Pump On <br /> 8. Total Depth (Total gallon dividcd by gallon per inch) <br /> Total Gallon (#7)+gallon �nch(#2) <br /> �j�+ .Z.3 =�inches To 1 Pumpout Volumc <br /> Pump Off <br /> Pump Hcight <br /> 9. Float Scparation Distance(equal total pumpout volume) <br /> Total pumpout volum� 4c)+�allons/inch (#2) <br /> ��7 ��.�=�inches <br />