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OSTP Pressure Distribution <br />lit <br />Minnesota Pollution Design Worksheet UNIVERSITY <br />/l T It/ti ATATT -A fig ' 1' <br />t ontrol Agency vi lrli l\ 1I L1J V an <br />12. Calculate the Square Feet per Perforation. Recommended value is 4-11 ft7 per perforation. <br />Does not apply toAt-Grades <br />a. Bed Area = Bed Width (ft) X Bed Length (ft) <br />10 ft X 30 ft = 300 ft, <br />b. Square Foot per Perforation = Bed Area divided by the Total Number of Perforations. <br />300 <br />ft z 36 perforations = 8.3 ft" /perforations <br />13. Select Minimum Average Head: 1.0 ft <br />14. Select Perforation Discharge (GPM) based on Table: 0.41 GPM per Perforation <br />15. Determine required Flow Rate by multiplying the Total Number of Perfs. by the Perforation Discharge. <br />36 Perfs X 0.41 GPM per Perforation = 15 GPM <br />16. Volume of Liquid Per Foot of Distribution Piping (Table 11) : 0.110 Gallons/ft <br />17. Volume of Distribution Piping = <br />= [Number of Perforated Laterals X Length of Laterals X (Volume of <br />Liquid Per Foot of Distribution Piping] <br />X 28 ft X 0.110 gal/ft = 9.2 Gallons <br />18. Minimum Delivered Volume = Volume of Distribution Piping. X 4 <br />9.2 gals X 4 = 37.0 Gallons <br />manifold pipe <br />i <br />r <br />r <br />pipe from pump <br />lean outs <br />• <br />•r'. <br />altemate location <br />of pipe from pum <br />Comments/ Special Design Considerations: <br />Table II <br />Volume of Liquid in <br />Pipe <br />Pipe <br />Diameter <br />(inches) <br />Liquid <br />Per Foot <br />(Gallons) <br />1 <br />0.045 <br />1.25 <br />0.078 <br />1.5 <br />0.110 <br />2 <br />0.170 <br />3 <br />0.380 <br />4 <br />0.661 <br />Cleanouts --- -- <br />Manifold pipe, <br />Alternate location <br />of pipe from pump <br />