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v 07.14.15 <br />1. A.Design Flow (Design Sum.1A):GPD <br />B. Min. required pump tank capacity: Gal C.Recommended pump tank capacity: Gal <br />D. Pump tank description: <br />MEASURED TANK CAPACITY (existing tanks): <br />2. A. Rectangle area = Length (L) X Width (W) <br />ft X ft =ft2 <br />B.Circle area = 3.14r2 (3.14 X radius X radius) <br />3.14 X 2 ft =ft2 <br />C. <br />ft2 X 7.5 gal/ft3 ÷ 12 in/ft =Gallons per inch <br />D. Calculate Total Tank Volume <br />Depth from bottom of inlet pipe to tank bottom :in <br />Total Tank Volume = Depth from bottom of inlet pipe (Line 4.A) X Gallons/Inch (Line 2) <br />in X Gallons Per Inch = Gallons <br />MANUFACTURER'S SPECIFIED TANK CAPACITY (when available): <br />3. A. Tank Manufacturer: <br />B. Tank Model: <br />C. Capacity from manufacturer: Gallons <br />D. Gallons per inch from manufacturer: Gallons per inch <br />E. Liquid depth of tank from manufacturer: inches <br />4. <br />(Pump and block height + 2 inches) X Gallons Per Inch (2C or 3E) <br />(in +2 inches) X Gallons Per Inch =Gallons <br />5. <br />- Line 17 of the Pressure Distribution or Line 11 of Non-level Gallons (minimum dose) <br />6. Calculate Maximum Pumpout Volume (25% of Design Flow) <br />Design Flow: GPD X=Gallons (maximum dose) <br />7.Gallons <br />8.Calculate Doses Per Day = Design Flow ÷ Delivered Volume <br />Doses <br />9. Calculate Drainback: <br />A.Diameter of Supply Pipe = inches <br />B. Length of Supply Pipe = feet <br />C.Volume of Liquid Per Lineal Foot of Pipe = Gallons/ft <br />D.Drainback = Length of Supply Pipe X Volume of Liquid Per Lineal Foot of Pipe <br />ft X gal/ft = <br />Gallons <br />10.Total Dosing Volume = Delivered Volume plus Drainback <br />gal + gal = <br />Gallons <br />11. Minimum Alarm Volume = Depth of alarm (2 or 3 inches) X gallons per inch of tank <br />in X gal/in = <br />Gallons <br />Calculate Gallons Per Inch. Multiply the area from 1.A or 1.B, by 7.5 to determine the gallons per foot <br />the tank holds and divide by 12 to calculate the gallons per inch. <br />Project ID: DETERMINE TANK CAPACITY AND DIMENSIONS <br />Time to Pressure <br /> <br />450 <br />3 18.8 <br />40 <br />12 <br />40 <br />6.8 <br />Brown Wilbert <br />450 <br />85 <br />0.170 <br />0.25 <br />450 <br />500 <br />2 <br />92 <br />85 <br />113 <br />48.0 <br />6.8 <br />5 <br />85 <br />0.170 <br /> Minimum Delivered Volume = 4 X Volume of Distribution Piping: <br />18.8 <br /> <br /> 18.8 <br />DETERMINE DOSING VOLUME <br />gal = <br />2250 - 3 compartment <br />Calculate Volume to Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of the <br />pump tank & 2 inches of water covering the pump is recommended) <br />OSTP Pump Tank <br />Design Worksheet <br />757 <br />18.8 <br /> <br />263 <br />Select a pumpout volume that meets both Minimum and Maximum: <br />gpd ÷ <br />757 <br /> <br /> <br />48 <br />56.4 <br />Note: Design calculations are based on <br />this specific tank. Substituting a <br />different tank model will change the <br />pump float or timer settings. Contact <br />designer if changes are necessary. <br />Width <br />Length <br />Radius