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OSTP Pressure Distribution � -�� <br /> , , a <br /> � � • UNIVERSITY �� �'�- <br /> Minnesota Pollution Des�gn Worksheet OF MINNESOTA �� xN� <br /> Control pgency �' � ''�-��.,�"y' <br /> 12. Calculate the Square Feet per Perforation. Recommended volue is 4-11 ft z per perforation. <br /> Does not apply to At-Grades <br /> a, Bed Area = Bed Width (ft) X Bed Length (ft) <br /> 24 ft X 46 ft = 1104 ft2 <br /> b. Square Foot per Perforation = Bed Area divided by the Total Number of Perforations. <br /> 1104 ft2 - 120 perforations = 9.2 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 Tota( Number of Perfs. by the Perforation Dischorge. <br /> 120 Perfs X 0.56 GPM per Perforation = 68 GPM <br /> 16. Vo(ume of Liquid Per Foot of Distribution Piping (Toble ll) : 0.170 Gallons/ft <br /> �7, Volume of Distribution Piping = <br /> Table II <br /> _ [Number of Perforated Latera(s X Length of Loterals X (Volume of Volume of Liquid in <br /> Liquid Per Foot of Distribution Piping] Pipe <br /> Pipe Liquid <br /> � X � ft X 0.170 gal/ft = 59.8 Gallons Diameter Per Foot <br /> (inches) (Galtons) <br /> 18. Minimum Delivered Volume = Volume of Distribution Piping X 4 1 0.045 <br /> 1.25 0.078 <br /> 59.8 gals X 4 = 239.4 Gallons 1.5 0.110 <br /> 2 0.170 <br /> man'o pipe� 3 0.380 <br /> � 4 0.661 <br /> i <br /> � �-Cleanouu —� J � --� <br /> pipe from pump ' '� <br /> ,. <br /> ��/ Manifold pipe, <br /> lean outs ' � <br /> ♦ ' <br /> / �. � <br /> % ; <br /> � <br /> altemate location ---�- <br /> of i e from um �Altemate location <br /> of pipe fiom pump <br /> Pi from um <br /> Comments/Special Design Considerations <br />