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OSTP Pressure Distribution <br /> UNIVERSITY ` <br /> Minnesota Pollution <br /> Control Agency Design Worksheet OF MINNESOTA <br /> 12. Calculate the Square Feet per Perforation. Recommended value is 4-11 ft2 per perforation. <br /> Does not apply to At-Grades <br /> a. Bed Area = Bed Width (ft)X Bed Length (ft) <br /> i <br /> 10 ft X 63 ft = 630 ft2 <br /> jb. Square Foot per Perforation = Bed Area divided by the Total Number of Perforations. <br /> 630 ft2 - 63 perforations c 10.0 ft2/perforations <br /> 13. Select Minimum Average Head: 1.0 ft <br /> 14. Select Perforation Discharge (GPM) based on Table: 0.56 GPM per Perforation <br /> I <br /> 15. Determine required Flow Rate by multiplying the Total Number of Perfs. by the Perforation Discharge. <br /> 63 Perfs X 0.56 GPM per Perforation = 36 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping (Table ll): 0.170 Gallons/ft <br /> 17. Volume of Distribution Piping = <br /> Table II <br /> _ [Number of Perforated Laterals X Length of Laterals X (Volume of Volume of Liquid in <br /> Liquid Per Foot of Distribution Piping] Pipe <br /> Pipe Liquid <br /> X 61 ft X 0.170 gal/ft = 31.1 Gallons Diameter Per Foot <br /> (inches) (Gallons) <br /> 18. Minimum Delivered Volume=Volume of Distribution Piping X 4 1 0.045 <br /> 1.25 0.078 <br /> 31.1 ]gats X 4 = 124.4 Gallons 1.5 0.110 <br /> 2 0.170 <br /> i <br /> manitold pipe 3 0.380 <br /> f 4 0.661 <br /> i <br /> � - '"----- -"- -_ <br /> pipe from pump Cleanouts <br /> Manifold pipe, <br /> lean outs <br /> alternate location - <br /> of pnipe from pumdAlternate location <br /> of pipe from pump <br /> P' from pum <br /> Ii <br /> Comments/Special Design Considerations: <br /> i <br /> i <br /> i <br />