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OSTP Pressure Distribution <br /> �t I <br /> Minnesota Pollution Design Worksheet UNIVERSITY ,r k„J - tit <br /> Control Agency OF MINNESOTA ” 1„-+,-'- <br /> 12. Calculate the Square Feet per Perforation. Recommended value is 4-11 ft 2 per perforation. <br /> Does not apply to At-Grades <br /> a. Bed Area = Bed Width (ft) X Bed Length (ft) <br /> 3 ft X 50 ft = 150 ft2 <br /> b. Square Foot per Perforation = Bed Area divided by the Total Number of Perforations. <br /> 150 ft2 ÷ 51 perforations = 2.9 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 /> 15. Determine required Flow Rate by multiplying the Total Number of Perfs. by the Perforation Discharge. <br /> 51 Perfs Xr 0.56 'GPM per Perforation = 29 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping (Table II): 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 /> 3 X 48 ft X 0.170 gal/ft = 24.5 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 /> 24.5 gals X 4 = 97.9 Gallons 1.5 0.110 <br /> 2 0.170 <br /> manifold pipe` 3 0.380 1 <br /> 4 0.661 <br /> pipe from pump cleanoots <br /> ai*` Manifoldpipe� —�" <br /> clean outsJ <br /> V <br /> • #. �` J <br /> alternate location .....� k`--— �` <br /> of pipe from pump .+." "`Alternate location <br /> of pipe from pump <br /> f. Pi.e from urr� <br /> Comments/Special Design Considerations: <br />