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� OSTP Pressure Distribution _ <br /> Minnesota Pollution Design Worksheet UNIVERSTTY ������.;�� <br /> Contro!Agency OF MINNESOTA ""`� -�-�\�- <br /> � <br /> 12. Calcutate the SquQre Feet per Perforation. Recommended vQlue is 4-11 ft2 per perforotion. <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 ft2 <br /> b. Square Foot per Perforation =Bed Area divided by the Totat Number of Perforations. <br /> 630 ttZ .- 63 perforations = 10.0 ftZ/perforations <br /> 13. Select Minimum Average Head: 9.0 ft <br /> 14. Select Perforation Dischorge {GPM)based on Table: 0.56 GPM per Perforation <br /> �5• Determine required Ffow Rote by multiptying the Totai Number of Perfs. by the Perforotion Discha�ge. <br /> 63 Perfs X 0.56 GPM per Perforation= 36 GPM <br /> 16. Volume of Liquid Per Foot of Distribution Piping(Tabte ll): 0.170 Gallons/ft <br /> 17. Vo(ume of Distribution Piping = <br /> Table II <br /> _ [Number of Perforated Laterots X Length of Laterals X (Volume of volume of Liquid in <br /> Liquid Per Foot of Distribution Pipin;] p�pe <br /> Pipe Liquid <br /> �� X 61 ft X 0.170 gal/ft = 3i.1 Gallons Diameter Per Foot <br /> (inches) (Gallons) <br /> 18. Minimum Delivered Volume=Volurne of Distribution Piping X 4 1 0.045 <br /> 31.1 gats X 4 = 924.4 Gatlons 1.25 0.078 <br /> �.5 0.��0 <br /> 2 0.��0 <br /> mani o pipe` 3 0.380 <br /> � 4 U.661 � <br /> i <br /> � ----- ---- <br /> pipefrompump _--aea�o�is — � _, <br /> : <br /> lean outs � Maniiold pipe� <br /> , , � <br /> � <br /> , � <br /> 1��� J � <br /> alternate location --- --, <br /> of pi e from um `�Alternate IocaGon <br /> of pipe frorn pump <br /> Pi e from um <br /> Comments/Special Design Considerations: <br />