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. � OSTP Pressure Distribution <br /> k."'fi, . <br /> Min�esotaPollution Design Worksheet UNIVERSITY <br /> Control Agenc OF MINNESOTA � - �\'".- <br /> ProjectlD: v 07.14.15 <br /> 1. Media Bed Width: �0 ft <br /> 2. Minimum Number of laterals in system/zone= Rounded up number of[(Media Bed Width - 4) : 3] + 1. <br /> � �� � 4 � + � - � 3 �laterals Does no[npply to at-grades <br /> L--�-----� <br /> 3. Designer Setected Number of l.acerals: ��laterals <br /> Cannot be less than line 2 /occeAt in Qt-Qradesl <br /> 4. Select Perforation Spaciny: 3.0 ft <br /> �� ��- . _ ...... - <br /> _. .... <br /> �__�-,f`=,=�-,_,�.�`�'�_�. <br /> 5. Select Perforation Diameter Size: 7/32 �� � .--___+..,., .-4:_._..._.___�_ ' 'f <br /> 6. lengch of Locerats =Media Bed Length - 2 Feet. <br /> 50 - 2ft = 48 ft PerforQtion can not be doser then 1 foot from edge. <br /> � Determine the Number o�Perforation Spoces. Divide the Lengrh of Laterols by the Perforation Spating <br /> and round down to the nearest whote number. <br /> Number of Perforation Spaces 48 ft .- �]ft = 16 Spdces <br /> N�mber of Perforotions per Lcrteral is equat to 1.0 p(us the Number of Perforofian Spaces. Check table <br /> 8. below to verify the number of perforations per tateral guarantees less than a 10�discharge variation. The <br /> value is double with a center manifold. <br /> Perforoiions Per Laterot = 16 Spates + 1 = 17 Perfs. Per Lateral <br /> M�xirtrMt�Nembcr of Parfaratic�rs Per L�tera�ta Guir�nte�e<t0l1 Disclrv�e Vartation <br /> �fnc P ara�ni 7r32 k�ca Perforatior�s <br /> Perforadon$pacu�q IFeet► �P�Dumeter(Mthes? Rerfor�tion Spaci�M PiPe Q�ameter Itn[1�es) <br /> t t�a ir, 2 3 t�eeti i t� t�: t 3 <br /> 7 10 13 1!t � bQ 2 i t 16 2 t 34 b� <br /> ��" 8 12 16 28 54 2v: 1p 14 24 32 6� <br /> 3 a 12 16 25 52 3 9 i4 19 �(► 60 <br /> 3'i6 hicle Perforanons t 8 Inch Pe�orations <br /> Perforat�on Sp�Ceng IFeet) P'Ae Diart�e�ter tMchesJ Perfaation Spacir�J Pipe Dsarrktet(k�tFresl <br /> I i+� 1w 2 3 I�eet) 1 1�4 tt: z 3 <br /> 2 12 IS 16 46 6'7 2 2t 33 44 7� t�4 <br /> 2�` 12 11 2�t �0 aq 2�: IO 30 41 b9 135 <br /> 3 t2 i6 22 31 15 3 18 29 3$ N 128 <br /> 9• TotQt Number of Pe�forotions equals the Number of Perforvtions per Lotero( multiptied by the Number of <br /> Perfor4ted Laterals. <br /> 17 Perf. Per Lat. X �Number of Perf. Lat. = 51 Totat Number of Perf. <br /> L__----� <br /> 10. Select Type of Manifotd Connection (End or Center}: '�; End r^ <br /> �; Center <br /> 11. Selecr Lateral Diameter(See Table): Z.pp �� <br />