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Sizing of Punt� Station <br /> 1. Dctcrminc Surfacc Area T <br /> Rcctanglc=Arca= L x W W'��h <br /> x = square feet 1 <br /> l.cnglh <br /> Circle= Area=n x(Radius)2 <br /> 3.14 x x = square feet Radius <br /> Other=Get Surface Area from Manufacturer n=3.�a <br /> square feet <br /> 2. Calculate Gallons Per lnch <br /> Thcre are 7.5 gallons per cubic foot of volume,thercforc you must multiply the arca <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Arca x 7.5 gpft'+12 inchs per foot <br /> x 7.5+12 =�gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inchcs of watcr covcring pump) Estimata!Scwage Flows in Gallons per day <br /> (Height in)+2 inchcs) x allons/inch(#2) �g�� <br /> (�+ 7 )x�_�gallons ❑m r <br /> of Type I Typc II Type ll[ Typc <br /> I3cdrooms 1 V <br /> 4. Calculate Total Pumpout Volume 2 300 225 t80 <br /> a. To maximize pump life select�s,�,m�sizc for 4 to 5 pump operations per day. 3 450 300 218 � <br /> 7Sb gpci+4= }f gallons per dose 4 600 375 256 °r`�` <br /> b. Calculate drainback ���u� <br /> 5 7S0 450 294 ;,, <br /> 1. Determine total pipe length,�feet. 6 900 525 332 �iir��' <br /> 7 1050 600 370 <br /> 2. Detcrmine liquid volume of pipe,��gallons per 1(H)fc�ct. 8 1200 675 408 �„i;,�;,,� <br /> 3. Mul�ply length bY,volume: Drainbac_qu.i tity= <br /> �fcet x�gallons/]00 ft. — gallons. <br /> Pi diameter inchcs C�Ilons r 100(ut <br /> c. Total pump ��lu�me equals dose volumc drainhack 1 4.4 <br /> �-1�—�Sallons per dosc+�gallons= �0 gallons 1.25 7.77 <br /> l.S 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inchcs) 2 17.43 <br /> Depth(in)x gallons/inc (#2)= 2.5 24.87 <br /> ZU x�_�gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75% the daily Flow) <br /> Dail fjn.w(see page D-7)x.75= <br /> ��(Z x.75=��gallons <br /> Rcservc Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallons alarm+gallons rescrve capcity <br /> #3+#4c+ti5+#6 <br /> z�+��+�+,�5�= gallons Alarm <br /> Pump On <br /> 8. Total Dcpth (Total�allon dividcd by�allc�n per inch) <br /> Tota Gall n(#7)+ allo inch(#2) I To I Pumpout Uolumc <br /> �+�_�� inches Pump Off <br /> Pump Hcight <br /> 9. Float Separation Distance(equal total pumpout��olume) <br /> Tntal p m out volume 4c)+fiallons/inch(�t2) <br /> ���� _�inches <br />