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OSTP Pressure Distribution <br /> Minnesota Pollution Design Worksheet UNIVERSITY <br /> �� -�_: <br /> Control Agency OF MINNESOTA " �-'��� <br /> 12. Calculate the Squore Feet per Perforation. Recommended value is 4-11 ftZ per perforation. <br /> Does not apply to At-Grades <br /> a. Bed Areo = Bed Width (ft) X Bed Length (ft) <br /> 10 ft X 63 ft = 630 ft2 <br /> b. Squore Foot per Perforation = Bed Area divided by the Tota1 Number of Perforations. <br /> 630 ft2 � 63 perforations = 10.0 ftZ/perforations <br /> 13. Setect Minimum AverQge Head: 1.0 ft <br /> 14. Select Perforation Discharge (GPM) based on Table: 0.56 GPM per Perforation <br /> 15. Determine required Fiow Rate by multiplying the Tota(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 Pipfng (Table ll): 0.170 Gallons/ft <br /> 17. Volume of Distribution Piping = — Table II 1 <br /> _ [Number of Perforated Laterols X Length of Latera(s X (Volume of ' volume of Liquid in I <br /> Liquid Per Foot of Distribution Piping] piPe I <br /> Pipe Liquid I <br /> � 3 � X 61 ft X 0.170 gaVft = 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 O_078 <br /> 31.1 gals X 4 = 124.4 Gallons 1.5 0.110 <br /> � <br /> 2 0.97o j <br /> man o p�pe` 3 0.380 <br /> � 4 0_661 � <br /> � - -- _ _J <br /> � .-Cleanouts '" � -- <br /> pipe from pump <br /> �, Manifold pipe. <br /> lean ouu �' <br /> ♦ ' <br /> � <br /> � �. ; � <br /> � <br /> alternate bcation -- '- <br /> 0{ i e from uffl �Altemate location <br /> of pipe from pump <br /> Pi e from um <br /> Comments/Special Design Considerations: <br />