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i;-� <br /> OSTP Pressure Distribution <br /> l.I�Ii'ERSITY <br /> Minn�esata Pollution Design Worksheet OF MLNNESOTA <br /> Co�rtrol pgenCy , _. <br /> 1. Select Number of Perforated Loterols in system/zone: 3 �0e191� M rrimum <br /> �4�At'�9��!1��3��`� �� <br /> �Z fE2L)S ITlI�IIIRUlTI QI1CI 3 f22C 15 f/►QXIRIURI 5(�C1R�� c .: perforationsspaccd3'apatt otrock ���.-.. <br /> 2. Setect Perforation Spacing: 3.0 ft � ��� �'. _'?" <br /> ,,,,�9'of rodc� n <br /> 3. Select Perforation Diameter Size 7/32 inch � <br /> Pcrora0cn sizing:'/';o°/: <br /> Perora6cn spaci� :2'to 3' <br /> 4. Length of Laterols =Media Bed Length-2 Feet. Perforation can not be closer then 1 foot from edge. v 11.05.31 <br /> 63 - 2ft = 61 ft <br /> 5- Determine the Number of Perforation Spaces. Divide the Lengtf►of Latern(s (Line 4)by the Perforation Spacing (Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforotion Spaces = 61 ft - �ft = 20 Spaces <br /> 6. Number of Perforations per Latero( is equal to 1.0 ptus the Number of Perforation Spaces (Line 5). <br /> Perforations Per Lntern( = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Check table below to verijy the number of perforvtions per lateral guQ�antees tess thQn Q 10%dischurge variotion. The vatue is <br /> doub(e if the a center monifold is used. <br /> ..�,;,.-s- H,s-, }�-- •�:- - �_:� - :�•-- - - <br /> . '� -_�_.'- '. ' '4� . . . <br /> • . . ... .- . ,� .. . .. . .+ . , .. .. .. � . .- . <br /> _ . _ <br /> ' ." .-. _ .. �... -, . . .. ". __ c._ <br /> . -, -_ <br /> � � _ <br /> .. ,• " '. � ' ' , ' <br /> � ' "' ' , <br /> . ....... .. ...�.. .. . . _ _.,. ._ _.. _.___ ........_ ...y. . .. ._. .� ..._. . . __... . <br /> . . � x.. <br /> � . •�. � <br /> � .. . ..- . . . .. . ' > '' ^ .. � <br /> � ' ' ' " s . . . . :C-- " _ -' ^ '. _ <br /> :_E". a. ."� . . '-�• . . - - ' - <br /> . _ ' "" <br /> , �� . . .�., :i :r. u": < � :' . :r � -0-+ ��3 ta'� <br /> . . : . , . .. t - : . <br /> � . . . ... ._. . . <br /> ._ . .. . _ C_ _ _ F_ <br /> �. � � _. .. � � <br /> " ' ' <br /> :. �. .� ..:. '" : � .1. - . _ ?" . � '� .. _ . . . 1' <br /> _ _ .� . .: <br /> 7• Total Number of Perforations equals the Number of Perforations per Lotera( (Line 6)multiplied by the Number of <br /> Perforated L.aterats (Line 1). <br /> 21 Perf. Per Lateral X �Number of Perf. Laterals = 63 Total Number of Perf. <br /> 8. Calcutate the Square Feet per Perforation. Recommended value is 4-10 ftZ per perforation. °"t""""""""�""'"' <br /> a�.,a,�;�c;.�,o�. <br /> Does not apply to At-Grades �.d cr�, , -,. ,, <br /> Bed Area = Bed Width(ft)X Bed Length(ft) ,,�. o,a o..� 0.5� o.:� <br /> t� o.az o.;i O.E9 o.s <br /> 10 ft x 63 ft = 630 ftz 2.� D7b_ O_S9 � o.� �A. <br /> ._'___'_ _._. . . ._. ."'...._._....._.___�._._ <br /> 27 O 29 0.55 O.l9 �.1• <br /> 7.V D.3Z 0.72 0.48 118 <br /> Square Foot per PerforQtion =Bed Area divided by the Tota!Number of Perforatrons (Line 7). �-o �.� 0.33 � 1.13 ,.:� <br /> S.U" D.11 093 ' 1.ib 1.65 <br /> � �� 'f'»( I?v.•II`n,.�.d�•':fIS?fhrnl!nircn <br /> 630 ft2 63 perforations - 10.0 ft2/perforations 7erto�ftwr, <br /> D,r.G:aY.:.K:'�!e iach FCrio'acor <br /> elcrl ^.:here-tib.i•.zai-rtt,n�A�:'S�:ri:t1/t� <br /> 9. Select Minimum Average Head: 1.0 ft �x„�^,�4��«��:o�a�pT: <br /> �Arr e�ceb:bi.+ant:e+d.�i.-5 wi:h i!Binrh <br /> )�rec perto-��br. <br /> 10. Select Perforation Dischnrge (GPM)based on Table III: 0.56 GPM per PerForation <br /> 11. petermine required Flow Rate by multiplying the Tota(Number of Perforotions (Line 7)by the Perforation Dfscharge (Line 10). <br /> 63 Perforations X 0.56 GPM per Perforation = 36 GPM <br />