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�. OSTP Pressure Distribution <br /> MinnesoW Pollution Design Worksheet UNIVERSITY <br /> Controi p enc OF MINNESOTA `�,,,� <br /> 12. Calculate the Square Feet per Perforation. Recommended value is 4-11 ft� per perforation. <br /> Does not app/y to At-Grades <br /> a. Bed Area = Bed Width (ft) X Bed Length (ft) <br /> 10 ft X 63 ft = 630 ftZ <br /> b. Squore Foot per Perforation = Bed Are4 divided by the Total Number of Perforattons. <br /> 630 ft2 = 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 F(ow Rate by multiplying the Total Number of Perfs. by the Perforation Dischorge. <br /> 63 Perfs X 0.56 GPM per Perforation = 36 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping (Toble 11): 0.170 Gallons/ft <br /> 17. Volume of Distribution Piping = <br /> Table it <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 /> Pipe Liquid <br /> �3 � X 61 ft X 0.170 gal/ft = 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 0.078 <br /> 31.1 gals X 4 = 124.4 Gallons 1.5 0.110 <br /> 2 0.170 <br /> man o pipe� 3 0.380 <br /> � 4 0.661 <br /> i <br /> � �-Cleanouu -"- � - - <br /> pipe from pump - ' <br /> , <br /> .' <br /> ICa�OUtS ; Manifold pipe� <br /> ♦ � <br /> i � <br /> i � <br /> � �• � i <br /> � <br /> alternate location -"'-- <br /> of i e from um ,vumace bcadon <br /> of pipe from pump <br /> Pi irOm um <br /> Comments/Special Design Considerations: <br />