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Minnesota Pollution OSTP Pump Tank Sizing, Dosing and Float <br /> and Timer Settin Desi n Worksheet uN'vERs�-rY <br /> ControlAgency � � OF l�/TINNESOTA <br /> DETERMINE AREA AND/OR GALLONS PER INCH Project ID: v 11.09.22 <br /> t. A. Rectangle area=Length(L)X Width(W) <br /> Width <br /> �ft X � ft = �ftz <br /> B• Cirde area=3.14�(3.14 X radius X radius) �� ' <br /> Length <br /> 3.14 X �2 ft - �ftZ <br /> H <br /> C. Tank modet and manufacturer: Bell2 PI8in2 Blk&Tile Radiu <br /> D. Get area from manufacturer �ftZ <br /> E. Get gallons per inch from manufacturer 25.3 Gallons per inch <br /> 2. Catculate Gollons 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 foot <br /> the tank hotds. Then divide that number by 12 to calculate the gallons per inch. <br /> (Area X 7.48 gallons/ft3)/(12 in/ft)= <br /> � ft2 X 7.48 gal/ft' = 12 in/ft = 25.3 Gallons per inch <br /> TANK CAPACfTY <br /> 3. Enter the Designed Pump Tank Capocity(minimum provided in the table): 1250 Gallons <br /> 4. Calculate Totol Tank Volume <br /> A. Oepth from bottom of inlet pipe to tank bottom: 49.5 in <br /> B. Total Tank Volume =Depth from bottom of inle[pipe (Line 4.A)X Gallonsllnch (Line 2) <br /> 49.5 in X 25.3 Gatlons Per Inch = 1249.9 Gattons <br /> 5• Calculate Volume to Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of <br /> the pump[ank&2 inches of water covering the pump is recommended) <br /> (Pump and btock height+2 inches)X Gollons Per Inch (1D or 2) • <br /> ( 14 in + 2 inches) X 25.3 Gallons Per Inch = 404 Gatlons <br /> DOSING VOLUME <br /> 6. Minimum Pumpout Vo(ume -4 X Volume of Distribution Piping: 63.4 Gatlons <br /> -Line 17 of the Pressure Distribution or Line 11 of Non-level <br /> 7. Calculate Moximum Pumpout Volume (25%of Design Flow) <br /> Design Flow: 600 GPD X 0.25 = 150 Gallons <br /> 8. Select o pumpout volume tha[meets both items above (Line 6&7): 150 Gallons <br /> 9. Calculate Doses Per poy =Design Flow:Dosinq Volume <br /> 600 gpd : 150 gat = 4.0 �oses Volume of Liquid in <br /> 10. Calculate Drainback: �Pe <br /> A. DiameterojSupplyPipe= �inches Pipe Liquid <br /> B. Length of Supply Pipe= 200 feet Diameter Per Foot <br /> C. Volume of Liquid Per Linea(Foot of Pipe = 0.170 Gallons/ft (i nches) (Gallons) <br /> D. Drainback =Length oJ Supply Pipe X Volume oj Liquid Per Lineal Foot of Pipe 1 0.045 <br /> 200 ft X 0.170 gal/ft = 34.0 Gatlons 1 .25 0.078 <br /> 11. To[al Dosing Volume =Dosing Volume (Line 8)plus Drainbock (Line 10.D) ' �•5 �.��� <br /> 150 gdl + 34.0 gat = 184 Gallons 2 0.170 <br /> 12. Minimum Alarm Votume=Depth of alarm(2 or 3 inches)X gallons per inch of tank(Line 1 or 2) 3 0.380 <br /> �in X 25.25 gal/in = 75.8 Galtons 4 0.661 <br />