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OSTP Pressure Distribution <br /> Minnesota Pollution Design Worksheet UNIVEKSITY "�..�` �, <br /> Control Agency OF MINNESOTA ` �--''���,� <br /> Project ID: v 06.12.13 <br /> 1. Media Bed Width: �� ft <br /> 2. Minimum Number of Laterals in system/zone= Rouded up number of [(Media Bed Width - 4) : 3] + 1. <br /> ( 10 -4 ) + � - ��laterals Does not apply to at-grades <br /> 3. Designer Selected Number of Latercrls: ��taterals <br /> Cannot be less thon(ine 2 (accept in at-¢rades) - <br /> 4. Select Perforation Spercing: 3.0 ft � � -• "� <br /> -- - µ'-----�_,� �, <br /> , ,:.,.....................,�.,.�, ,� li,,.., � <br /> 5. Select Perforation Diameter Size: 7/32 in ---� <br /> —�_ _ <br /> -�-;--— <br /> , . � <br /> _-------�---____.______.�_.____------- <br /> 6. Lengrh of taternls = Media Bed Length - 2 Feet. <br /> 63 - 2ft = 61 ft Perforation ccrn not be c(oser then 1 foot from edge. <br /> � Determine the Number of Perforotion Spaces. Divide the Length of Laterals by the Perforation Spacins <br /> and round down to the nearest whole number. <br /> Number of Perforotion Spaces 61 ft .- � 3 �ft = 20 Spaces <br /> Number of Perforations per Lateral is equal to 1.0 plus the Number of Perforation Spoces. Check table <br /> 8. below to verify the number of perforations per lateral guarantees less than a 10%discharge variation. The <br /> value is double with a center manifold. <br /> Perforations Per Laterol = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Mtaxim�n Nurt�ber of Pesforatiam Per Lateral ta Guarantee<1046 Discharge'lanatian <br /> '�trxh P orataans 7;311nrn Pe�forations <br /> Pe�fere;�:+Spacing IFeetl <br /> Fipe Diame,?r iinches) Perforation Spacinq Pipe Dsarnet�er t'inches) <br /> t i.u.• 4�: 2 "s +Feetl I i�. 1� 2 3 <br /> 2 ta 13 !8 3�i b0 2 1i 16 21 3�4 b8 <br /> �"• 8 12 16 2B 54 2`�: 1t� 14 20 32 b�t <br /> 3 8 12 96 25 52 3 9 14 19 30 60 <br /> ? 16 inch Pertorations 1'6 Inch Perfarations <br /> Pipe[�ia.�ne:�r(Irxhesl Pe�foracion Spacing Pipe D:ameter(inchez) <br /> Perforataon Spaang fFeetl <br /> i t.v, tr, 2 3 i�eetl 1 tu: ti: 2 3 <br /> 2 12 18 26 46 67 2 21 33 44 14 149 <br /> ��� 12 17 ia 40 60 2�: 2G 30 4t 6� 135 <br /> 3 12 16 22 37 75 3 20 29 38 64 128 <br /> 9• Totol Number of Perforations equals the Number of Perforations per Laterol multiplied by the Number of <br /> Perforated LaterQ(s. <br /> 21 Perf. Per Lat. X ��Number of Perf. Lat. = 63 Total Number of Perf. <br /> 10. Select Type of Manifo(d Connection (End or Center): ^Jl End ❑ Center <br /> 11. Se(ectLaterat Diameter(See Table): 2.00 in <br />