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�; OSTP Pump Tank Sizing� DO5111� dI1CI FIO�t UNIVERSITY <br /> Mlnnesota Pollutlon and Timer Setting Design Worksheet OF�VIINNESOTA <br /> control Agency <br /> DETERMINE AREA AND/OR GALLONS PER INCH v 11.05.31 <br /> 1. A. Rectangle area=Length(L)X Width(W) W� <br /> 9.2 ft X 4.5 ft = 41.4 ftZ <br /> B. Circle area=3.14�(3.14 X radius X radius) ��� <br /> 3.14 X ��2 ft = ��ft2 <br /> C. Tank model and manufacturer: . �- Radiu <br /> D. Get area from manufacturer C�ftZ <br /> E. Get gallons per inch from manufacturer ��Gallons per inch <br /> 2. Calalate Gn!lons Per Inch: ti. <br /> There are 7.48 gallons per cubic foot. Therefore,muttiply the area from 7.A,1.B,or 1.0 by 7.48 to detertnine the gallons per foot <br /> the tank holds. Then divide that number by 12 Lo calculate the gatlons per inch. <br /> (Area X 7.48 gallons/ft3)/(12 in/ft)_ <br /> 41.4 ft� X 7.48 gal/ft' + 12 inlft = 25.8 Gallons per inch <br /> TANK CAPACITY <br /> 3. Enter the Designed Pump Tnnk Capaciry(minimum provided in the table below): 1000 Galloru <br /> 4. Calculate Totcl Tank Volume <br /> A. Depth from boitom of inlet pipe to Lank bottom: 39 in <br /> B. Total 7ank Volume =Depth fram bottom o�inlet pipe (Line 4.A)X Gallons/Inch (Line 2) <br /> 39 in X 25.$ Gallons Per Inch = 1006.4 Gallons <br /> 5. Calculate Vo[ume 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 block height+2 inches)X Gallons Per lnch (1D or 2) <br /> (��in + 2 inches) X 25.8 Gatlons Per Inch = 258 Galloru <br /> DOSING VOLUNIE <br /> 6. Minimum Pumpout Volume -4 X Volume of Distribution Piping: 47.5 Gallons <br /> -Line 17 of the Preswre Distribution or Line f 1 of Non-level <br /> 7. Calculate Maximum Pumpout Volume (25%of Design Row) <br /> Design Flaw: 450 GPD X 0.25 = 112.5 Gallons <br /> 8, Sefect a pumpout volume thut meets both items above (Line 6&7): 75 Gallons <br /> 9. Calculate Doses Per Day=Design Flow:Dosing Volume <br /> 450 gpd: 75 gat = 6.0 Doses <br /> 10. Cakulate Drainback: <br /> A. Dinmeter of Suppiy Pipe= �inches <br /> B. Length of Supply Pipe= 70 feet <br /> C. Vo(ume of Liquid Per Lineal F�i oJ Pipe = 0.170 Gallons/ft <br /> D. Drnin6ock =Lengih o�Supp(y Pipe X Volume of Liquid Per Lineal Foot of Pipe <br /> 70 ft X 0.170 gal/ft = 11.9 Gatlons <br /> 11. Totoi Dosing Volume =Dosing Volume (Line 8)plus Drainbock (tine 10.D) <br /> 75 gal� 1�.9 gal= 87 Gattoru <br /> 12. Minimum Alarm Volume=Depth of alarm(2 or 3 inches)X gallons per inch of tank(Line 1 or 2) <br /> �in X 25.806 gal/in = 51.6 Galtons <br />