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OSTP Pressure Distribution .��; <br /> Minnesota Pollution Desi n Wor UNIVERSITY � <br /> g ksheet N �.�.�,, <br /> Control Agency OF MI NESOTA � <br /> 12. Calculate the Square Feet per Perforotion. Recommended value is 4-11 ft z per perforotion. <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 ftz <br /> b. Square Foot per Perforation = Bed Areo divided by the Total Number of Perforations. <br /> 630 ftz .- 63 perforations = 10.0 ftZ/perforations <br /> 13. Select Minimum Average Heod: 1.0 ft <br /> 14. Select Perforotion Dischorge (GPM) based on Table: 0.74 GPM per Perforation <br /> 15. Determine required F(ow Rate by multiplying the Tota( Number of Perfs. by the Perforotion Discharge. <br /> 63 Perfs X 0.74 GPM per Perforation = 47 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping (Tob(e I!): 0.170 Gallons/ft <br /> 17. Vo(ume of Distribution Piping = <br /> Tabte II <br /> _ [Number of Perforated Loterals X Length of Laterols 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 Detivered Volume = Volume of Distribution Piping X 4 1 0.045 <br /> 1.25 0.078 <br /> 31.1 gals X 4 = 124.4 Gallons 1.5 0.110 <br /> 2 0.170 <br /> mani o pipe` 3 0.380 <br /> � <br /> � 4 0.661 <br /> � �- Cleanouts -" '- <br /> pipe from pump ' <br /> . <br /> .' <br /> . <br /> lean outs Manifold pipe� <br /> ♦ , <br /> ' � <br /> � �• ; i <br /> • <br /> alternate location ----'-- <br /> of i e from um �Alternate location <br /> oi pipe from pump <br /> Pi e from um <br /> Comments/Special Design Considerations: <br /> i � I , <br />