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• OSTP Pump Tank Sizing, Dosing and Ftoat <br /> and Timer Setting Design Worksheet �Nr�'ERsfT� ` <br /> Minhesota Poliution �� <br /> Gontral Agenty OP�lI�NES07A ' _,,.;�. <br /> DETERM{NE TANK CAPACITY AND DIMENSIONS Prn�ecc ID; v 12.08.06 <br /> L A. Design F(ow (Design Sum.JA): 150 Gpp <br /> B. Minimum required pump tank capacity: ��Ga{ C. Recommended pump tank capadty: ���� <br /> MEASURED TANK CAPACITY(existing tanks): <br /> 1. A, Rectangle area=Length(L)X Width(Wl <br /> 5.0 ft X S.0 ft = 40.0 ftz Width <br /> B� Circte area=3.14r�(3.14 X radius X radiusJ <br /> r <br /> 3.14 X �z ft ' �ft� ' _._._�i, <br /> Ler,gih <br /> C. Catculate Gallons Per inch. There are 7.5 gallo�s per cubic foot. Therefore,muttiply[he area � <br /> from i.A or 1.8, by 7.5 to determine the galtons per foot the tank holds. Then divide that <br /> number by 12 to calcutate the gailons per inch. � �� <br /> f2atliµ� <br /> 40A ft� X 7.5 gaUft' : 12 in/ft = 25.0 Ga�tons per inch �/ <br /> D. Cattulate Tota(Tank Volume <br /> Depth Jrom bottom o/in(et pipe to tank bottom; 40 in <br /> Totat Tenk Volume =Depth jrom bottom of irt(et pipe (Line 4,A}X GaGorts/lnch�tine 21 <br /> 40 in x 25.0 Galtons Per Inch = 10(10.0 Gatlons <br /> MANUFACTURER'S SPECIFIED TANK GAPALITY�whe�available): <br /> 3. A. Tank Manufacturer: Note:Design calculations <br /> are based on this specific <br /> B. Tank Model: tank.Substituting a <br /> different tank modet wit( <br /> C. Capacity from manufacturer. �GaUons change the pump floa;or <br /> D. Gattons per inch from manufac[urer: �Galtons timer settings.Contact <br /> per inch designer if cnanges are <br /> E Liquid depth of Wnk from manufacturer: ��inches necessary. <br /> OETERMlNE DOSING VOLUME <br /> 3• Catcu(aie Volame to Caver Pump {The inlet o'the pump must be at teast 4-inches from the bottom of <br /> the pump tank&2 inches of waier crnering the pump is recommended) <br /> (Pump and block height.2 inches}X Gallons Per l,ach (2C or 3E} <br /> { 14 jn + 2 inches) X 25.0 Gattors Per inch = 4Q0 Gailons <br /> 4. Minimum Pumpout Volume -4 X Volume of Distribution Viping: 83.6 Gallons <br /> -tfne 17 of the Pressure Distribution or Line i 1 of Non-ievel <br /> 5. Calcutate Maximum Pumpaui Votume (25%of Design Ftow) <br /> Design Ftow: 7S0 GPD X Q•25 = 187.5 Gallons <br /> 6. Selec[a pumpout wlume that meets both items nbove (Line 4 8 5): 107 Galtqns <br /> 7• Calculate Doses Per Day =Design Flow:Dosing Volume <br /> rso gpd= �07 gal = �.o o�e5 Yaiume of Liquid in <br /> 8. Calwlate Drainback: plpe <br /> A. Diameterof Supply Pipe= �_�'^�hes Pipe Liquid <br /> B. Length of Suppty Pipe= 115 teet Diameter Per Foot <br /> C. Yolume of Llquid Per Lirteal Foot of Pipe= �.170 Gallons/ft (inehes) (Cx3IIpf)S� <br /> D, Drainbock =Length oj Supply Prpe X Vo(ume of Liquid Per Linea(Foo[oj Pepe 1 Q.045 <br /> �15 ft X o.»o gal/ft = 19.6 Gallons 1.Z5 U.078 <br /> 9. Total Dosirrg Votume=Dosing Volume plus Droinback �.5 0.�'�� <br /> �o� gat+ 19.6 gal= 127 Gallons 2 Q.170 <br /> 10.Minimum Atarm Voiume=Depth of alarm(2 or 3 inches}X gatlons per inch of tank 3 Q.3$0 <br /> C—Iin X 25.o gal/tn = 75:o Gattons 4 0.661 <br /> f <br /> / '� <br />