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OSTP Pressure Distribution <br />Minnesota Pollution <br />Control Agency <br />• UNIVERSITY Des1gn Worksheet oF MINNESOTA !Mc <br />12. Calculate the Square Feet per Perforation. Recommended value is 4-11 ft 2 per perforation. <br />Does not apply to At-Grades <br />a. Bed Area = Bed Width (ft) X Bed Length (ft) <br />.___1_0 ___.lft X .__I _63____,I ft ln2 -----630 <br />b. Square Foot per Perforation = Bed Area divided by the Total Number of Perforations. <br />__ 6_3o __ lft2 + ... I __ 6_3 _ __.I perforations = 10. 0 I ft2 / perforations <br />13. Select Minimum Average Head: ... l __ 1_._o_ ..... lft <br />14. Select Perforation Discharge (GPM) based on Table: 0.56 IGPM per Perforation <br />15. Determine required Flow Rate by multiplying the Total Number of Perfs. by the Perforation Discharge. <br />,___6_3 _ __.I Perfs X ,___o_.5_6_....,IGPM per Perforation= .___3_6 ___.I GPM <br />16. Volume of Liquid Per Foot of Distribution Piping (Table II): 0.170 !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 />.___3 _ __.I X ,__I _6_1 ___.I ft xi 0.170 !gal/ft = L..I _3_1_.1_ ..... IGallons <br />18. Minimum Delivered Volume = Volume of Distribution Piping X 4 <br />.___3_1_.1_-lgals X 4 = 124.4 !Gallons <br />mani o pipe, <br />I <br />I <br />I <br />I <br />Comments/Special Design Considerations: <br />I <br />I <br />I <br />/ <br />~---Cleanouts <br />,,,, ... "',,. <br />------------------ <br />. Ta\)le II •··.: . <br />Volume .of Liquid .in <br />.-.-Pipe • · <br />:Pipe ·'.'Liquid •· <br />Oiam~ter_ Per Foot <br />(inches)· .(G~llons) <br />. ~ ' . -· -' <br />1 0 .045 <br />1.25 0.078 <br />1 .5 0 .110 <br />2 0.170 <br />3 0.380 <br />4 0.661