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.. , , . �� ' <br /> M.inrtesota Poliution OSTP Pump Tank Sizing, Dosing and Ftoat <br /> U�iIVERSITY <br /> and Timer Setting Design Worksheet pF MII�NESOTA <br /> Contrpl Agency <br /> DETERMINE AREA AND/OR GALLONS PER INCH v 11.05.31 <br /> 1. A. Rectar�le area=Length(L)X Widffi(W) w� <br /> �ft X �� ft �ftZ <br /> B. Circle area=3.14�(3.14 X radius X radius) Length <br /> 3.14 X �2 ft = �ft� <br /> C. Tank modet and manufacturer: Radiu <br /> D. Get area from manufacturer �ft� <br /> E. Get gallons per inch from manufacturer 25.5 Gallons per inch <br /> 2. Calcutate Ga!lons Per Inch: <br /> There are 7.48 galtons per cubic foot. Therefore,multiply the area from 1.A,1.6,or 1.0 by 7.48 to determine the gallorn per foot <br /> the tank holds. Then divide that number by 12 to calcutate the gallons per inch. <br /> (Area X 7.48 gallons/ft3)/(12 in/ft)_ <br /> � � X 7_48 gal/ft3 = 12 in/ft = 25.5 Galtons per inch <br /> TANK CAPACITY <br /> 3. Enter the Designed Pump 7ank Copacity(minimum provided in the tabte below): 1300 Gallons <br /> 4. Calculate Total Tank Volume <br /> A. Deptn from bottom of inlet pipe to tank bottom: 57 in <br /> B. Total T�k Volume =Depth from bottom of inlet pipe (Li�re 4.A)X Ga(lons/Inch (Line 2) <br /> 57 in X 25.5 Gallons Per tncfi = 1452.9 Gattoru <br /> 5. Calculate Volume to Cover Pump (The inlet of the pump must be at teast 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 Gal(ons Per Inch (1D or 2) <br /> ( 12 in + 2 inches) X 25.5 Gailons Per Inch = 357 Gatlons <br /> DOSING VOLUME <br /> 6. Minimum Pumpout Volume -4 X Volume of Distribution Piping: 124.4 Gallons <br /> -Line 17 of the Pressure Distribution or Line 1 f of Non-levef <br /> 7. Calculate Mcrximum Pumpout Volume (25%of Design F[ow) <br /> Design Flow: 750 GPD X 0.25 = 187.5 Galtoru <br /> 8. Select a pumpout vo[ume that meets both items above (Line 6 Fr 7): 187.5 Galloris <br /> 9. Calculate Doses Per Day =Design Flow:Dosing Vo(ume <br /> 750 �pd: 187.5 gal = 4.0 Doses <br /> 10. Calculate Drainback: <br /> A. Diameter of Supp(y Pipe= �inches <br /> B. Length of SupQly Pipe= 100 feet <br /> C. Volume of Liquid Per Lineal Foot of Pipe = 0.170 Gatlons/ft <br /> D. Drainback =Length of Supply Pipe X Volume of Liquid Per Lineo(Foot of Pipe <br /> 100 ft X 0.170 gat/ft = 17.0 Galloas <br /> 11. Toto!Dosing Volume s�osing Volume (Line 8)plus Drain6ack (Line 10.D) <br /> 187.5 gal+ 17.0 gal= 205 Gattons <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 25.49 gal/in = 76.5 Gattons <br />