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� �� OSTP Pressure Distribution <br /> MinnesotaPollution Desi n Worksheet UNIVERSITY <br /> Conuol Agenry g OF MINNESOTA 1,,, <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 /> 10 ft X 63 ft = 630 ftZ <br /> b. Square Foot per Perforation =Bed Are4 divided by the Totn!Number of Perforations. <br /> 630 ftz .- 63 perforations = 10.0 ftZ/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 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping(Table II): 0.170 Gallons/ft <br /> �7, Volume of Distribution Piping = <br /> Table 11 <br /> _ [Number of Perforated Laterals X Length of Laterals X (Volume of votume of Liquid in <br /> Liquid Per Foot of Distribution Piping] �Pe <br /> Wpe Liquid <br /> � X 61 ft X 0.170 gal/ft = 31.1 Gallons Diameter Per Foot <br /> (inches) (Galbns) <br /> 18. Minimum Delivered Volume=Volume of Distribution Piping X 4 1 0.045 <br /> 1.25 O.Q78 <br /> 31.1 gals X 4 = 124.4 Gallons 1.5 0.110 <br /> 2 0.170 <br /> manio pipe� 3 0.380 <br /> i 4 0.661 <br /> � - - <br /> � -cteanouu "--- ' ----_ <br /> pipe from pump <br /> ��, <br /> . <br /> i Mani(old pipe� <br /> ean outs � �' ` <br /> � <br /> � .� � i <br /> � � -- <br /> altemate location '' <br /> of i e from um �•ntumam bunon <br /> of pipe trom pump <br /> tran <br /> Comments/Special Design Considerations: <br />