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OSTP Pressure Distribution <br /> Minnesota Pollution Design Worksheet UNIVERSITY <br /> Control Agency OF MINNESOTA <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 /> 10 ]ft X 63 ft 625 ft2 <br /> b. Square Foot per Perforation = Bed Area divided by the Total Number of Perforations. <br /> 625 ]ft2 - 63 perforations = 9.9 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 /> 63 __]Perfs X 0.56 GPM per Perforation = 36 1 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping(Table il): 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 /> L 3 X 61 ft X 0.170 = —� 101" Liquid <br /> gal/ft 30.9 Gallons � Rw Foot <br /> (inches) ((Wlons) <br /> 18. Minimum Delivered Volume=Volume of Distribution Piping X 4 1 0.048 <br /> 30.9 gals X 4 = 123.4 Gallons 1.25 0.0781 5 0.110 <br /> 2 0.170 <br /> t 3 0.380 <br /> 4cbm on0.661 <br /> ans <br /> M o$ f <br /> pl0emak localioe ---- <br /> 0(owfi0m AhKraft l c"w <br /> of pipe bw pwep <br /> Pipe mm <br /> Comments/Special Design Considerations: <br />