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' ���� <br /> OSTP Pump Tank LTNIVERSITY <br /> ""����'y°" Design Worksheet OF MINNESOTA �y� <br /> DETERMINE TANK CAPACI7Y AND DIWENSIONS Project ID: v 07.14.15 <br /> 1. A. Design F(ow (Desiqn Sum.1A): zZ5 GPD <br /> B. Min.required pump tank capacity: 1000 Gal C.Recommended pump tank capacity: 1000 Gal <br /> D. Pump tank description: Demand to Gravity <br /> MEASURED TANK CAPACITY(existing tanks): <br /> 2. A. Rectangle area=Length(L)X Width(W) <br /> W idth <br /> �ft X � ft = �ft� <br /> B. Cirde area=3.14r�(3.14 X radius X radius) <br /> 3.14 X �Z ft - �ftZ <br /> Length <br /> C, Calculate Gallons Per Inch. Multiply the area from 1.A or 1.6, by 7.5 to determine the gallons per foot <br /> the tank holds and divide by 12 to calculate the gallons per inch. <br /> � ft2 X 7.5 gal/ft' =12 in/ft = �Gallons per inch <br /> Radiu <br /> D. Calculate Tota!Tank Volume <br /> Depth from bottom of inlet pipe to tank bottom: �in <br /> Total Tank Volume =Depth from bottom oJ inlet pipe (Line 4.A)X Gallons/Inch (Line 2) <br /> � in X �Gallons Per Inch= �Gallons <br /> MANUFACTURER'S SPECIFIED TANK CAPACITY(when available): <br /> 3. A. Tank Manufacturer: Infiltrator Note:Design colculotions are bosed on <br /> this specific tank.Substftuting a <br /> B. Tank Model: IM-1060 different tonk mode(will change the <br /> C. Capacity from manufacturer: 1094 Gallons Pump Jloat or timer set[ings.Contact <br /> designer if changes are necessary. <br /> D. Gallons per inch from manufacturer: 24.9 Gallons per inch <br /> E. Liquid depth of tank from manufacturer: 44.0 inches <br /> DETERMINE DOSING VOLUME <br /> 4• Calculate Volume[o Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of the pump <br /> tank @ 2 inches of water covering the pump is recommended) <br /> (Pump and block height+2 inches)X Gallons Per Inch (2C or 3E) <br /> ( 14 jn + 2 inches) X 24.9 Gallons Per Inch = 398 Gallons <br /> 5. Minimum De(ivered Volume = 4 X Volume of Distribution Piping: <br /> -Line 17 oj the Pressure Distribution or Line 11 oj Non-leve! �Gallons(minimum dose) <br /> 6. Calculate Moximum Pumpout Volume (25%of Design Flow) <br /> Design Flow: 225 GPD X 0.25 = 56 Gallons(maximum dose) <br /> 7. Selec[a pumpout volume that meets both Mfnimum and Moximum: 56 Gallons <br /> 8. Calwlate Doses Per Day =Design Flow=Delivered Volume VQ�UIYI�'O��.�RR'�llid��t. <br /> 225 gpd= 56 gdl = ��� .�jp@ <br /> 9. Calculate Drainback: <br /> A. Diameter of 5upply Pipe= �2 inches �� , �.�i,l!'�i� <br /> D131y1Q�t' �?'F44� <br /> B. Length of Supply Pipe= 26 feet <br /> {i�cl�es� {+Catbrr�) <br /> C. Volume of Liquid Per Lineal Foot oJ Pipe = 0.170 Gallons/ft 1 0.045 <br /> D. Droinback =Length of Supply Pipe X Volume of Liquid Per Lineal Foot of Pipe �.25 �.�7$ <br /> 2e ft x o.»o gal/ft = a.a Gallons 1.5 0.110 <br /> 10. Totol Dosing Volume =Dellvered Volume plus Drainback 2 �.�70 <br /> 56 gal+ a.a ga�= bo Gallons 3 0.380 <br /> 1 i. Minimum Alarm Volume=Depth of alarm(2 or 3 inches)X gallons per inch of tank <br /> ��n X 24.9 gal/in = 49.8 Gallons 4 0.661 <br />