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, OSTP Pump Tank Sizin�, Dosing and Float <br /> UNIVERSITY ;�n '��� '"'�`"`° <br /> MinnesotaPollution and Timer Setting Design Worksheet � �s. � <br /> Cantrol Agency OF MINNESOTA =``.�•.,,� <br /> DETERMINE AREA AND/OR GALLONS PER INCH Project ID: v 11.09.22 <br /> 1. A. Rectangle area=Length(L)X Width(W) <br /> Width <br /> ��ft X �� ft = ��fiz <br /> B. Circle area=3.14�(3.14 X radius X radius) � � <br /> Length <br /> 3.14 X C�2 ft - ��fi2 <br /> �s <br /> C. Tank modet and manufacturer: CfeSt Radiu <br /> D. Get area from manufacturer ��ftZ <br /> E. Get gallons per inch from manufacturer 25.5 Gallons per inch <br /> 2. Calculate Gal(ons Per Inch: <br /> There are 7.48 gallons per cubic foot. Therefore,multiply the area from 1.A,1.B,or 1.0 by 7.48 to determine the gallons per faot <br /> the tank holds. Then divide that number by 12 to calculate the gallons per inch. <br /> (Area X 7.48 gattons/ft')/(12 in/ft)_ <br /> � ftZ X 7.48 gal/ft3 = 12 in/ft = 25.5 Gallons per inch <br /> TANK CAPACITY <br /> 3. Enter the Designed Pump Tank Copacity(minimum provided in the table): 1250 Gallons <br /> 4. Calculate Tota(Tonk Volume <br /> A. Depth from bottom of inlet pipe to tank bottom: 49.5 in <br /> B. Total Tank Vo(ume =Depth from bottom of inlet pipe (Line 4.A)X Gallons/Inch (Line 2) <br /> 49.5 in X 25.5 Gallons Per Inch = 1262.3 Gallons <br /> 5• Calcula[e Volume to Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of <br /> the pump tank 8 2 inches of water covering the pump is recommended) <br /> � (Pump and btock height+2 inches)X Gallons Per Inch (1 D or 2) <br /> ( 15 in + 2 inches) X 25.5 Gallons Per Inch = 434 Gattons <br /> DOSING VOLUME <br /> 6. Minimum Pumpout Vo(ume -4 X Volume of Distribution Piping: 100.6 Galtons <br /> -Line 17 of the Pressure Distribution or Line 11 of Non-leve( <br /> 7. Calculate Maximum Pumpout Volume (25%of Design Flow) <br /> Design Flow: 750 GPD X 0.25 = 187,5 Gallons <br /> 8. Select a pumpout volume that meets both items above (Line 6&7): 188 Gallons <br /> 9. Calculate Doses Per Day =Design Flow=Dosing Volume <br /> �so gpd = 188 gat = 4.0 Doses Volume af Liquid in <br /> 10. Calculate Drainback: PiPe <br /> A. DiameterofSupplyPipe= C2�inches Plp2 Liquid <br /> -_J <br /> B. Leng[h of Supply Pipe= 140 feet Diameter Per Foot <br /> C. Vo(ume of Liquid Per Linea(Foot of Pipe = 0.170 Gallons/ft (i nches) �Cid��0115� <br /> D. Drainback =Length of Suppl y Pipe X Volume of Liquid Per Linea(Foot of Pipe � 0.045 <br /> 140 ft X 0.170 gal/ft = 23.8 Galtons 1.25 0.078 <br /> 11. Tota(Dosing Volume =Dosing Volume (Line 8)plus Drainback (Line 10.D) �.5 0.110 <br /> 188 ga� + 23.8 gal= 212 Gatlons 2 0.170 <br /> 12. Minimum Alarm Yolume=Depth of alarm(2 or 3 inches)X gallons per inch of tank(Line 1 or 2) 3 0.380 <br /> C�in X 25.50 gal/in = 76.5 �allons 4 0.661 <br /> `1`�' eF- �3� <br />