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� OSTP Pressure Distribution <br /> Minnesota Potlution DesiQn Worksheet UNIVERSITY :_�Y' <br /> Cornroi Agenty S OF MINNESOTA . _ ,�,��� <br /> 1. Select Number of Perforated Laterals in rystem/zone: 3 Geote�ctile <br /> vo-�DO����O�����C Minimum�6� C�l� <br /> (2 feet is minimum and 3 feet rs moximum spacing) o�'���P�o���wx spaced 3'apart��` z•o{�y a �� <br /> 2. Setect Perforation Spacing: 3.0 ft � o�,���, � _ ,z- <br /> o� o�o�o�o�o� ����� o ��o <br /> ��+Do�D�sD�,,o�o��Q[ 9'of rock�o����U^� <br /> 3. Select Perforation Diameter Size 1/4 inch ���"���°���� � � � � <br /> Perforation sizing:'/r'to'/,' <br /> 4. Length of Laterals =Media Bed Length-2 Feet. Perforation con noY be c(oser then 1 foot from edge� �n:2'ta 3' <br /> �3 - Zft = 11 ft <br /> 5• Determine the Number of Perforation Spaces_ Divide the lenqth oj Laterals {Line 4)by the Perforation Spacing (Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spoces = 11 ft .- C3�ft - � 3�Spaces <br /> �-- <br /> 6. Number of Perforations per LQteral is equat to 1.0 plus ihe Number of Perforation Spoces (Line 5}, <br /> Perforations Per Lateral = I 3 ISpaces + 1 = �Perfs. Per Laterat <br /> Check Tabte 1 to ve�ify the number of perforations per(atera(�uorantees less than a 10%discharge variation. The value is doubfe if <br /> the a center mnnifo(d is used. <br /> �• Total Number of Perforations equals the Number of Perforations per Lotera( (Line 6)mu[tiplied by the Number of <br /> Perforated LaterQts (Line 1). <br /> C�Perf. Per Lateral X �Number of Perf. Laterals = 12 Total Number of Perf. <br /> 8. Calculate the Square Feet per Perforotion. Retommended v4(ue is 4-10 ft Z per perjoration. <br /> Peffafatlm D(Sd�yge(GPM) <br /> Does not app(y to At-Grades <br /> ne/wanon wameec <br /> Bed Area = Bed Width(ft)X Bed Length {ft) Head(ft) <br /> ,,a ,,� ,�_ ,�� <br /> 1.0' 0.18 0.l1 C.S6 0.74 <br /> 10 ft X 13 ft = 130 ftZ �.5 Q.0 o.s, Q69 0., <br /> 20� R26 0.59 .Q80 1.04 <br /> 25 O.I9 0.65 Qd9 1.17 <br /> Square Foot per Perforotion =Bed Area divided by the Totol Number of Perforations (Line 7). ��o o.3z o.,: o.�s ,.0 <br /> a.o o.s� o.a� i_u i.a <br /> 5.0 O.{t U.93 1.26 1.65 <br /> 130 ft2 - 12 perforations c 90.8 ftZ/perforations 1/4��c�a�d3lt6trchperfo2[fason <br /> ,��� �.�+��� <br /> I t r8 inch perfo2tlar¢on Q.vNUrrof arq hx <br /> 9. Select Minimum Average Head: 1.0 ft 4 �r�� a�g�«;u,me„� <br /> ( t/4 1�h and 3!16 fr�cA pefcratio;�s onµ515 <br /> S tee[ 1/D inth pertoraciorta an MS7S <br /> 10. Setect Perforation Discharge (GPM)based on Table III: 0.74 GPM per Perforation <br /> 11. Determine required Flow Rate by multiplying the Totel Number of Perforations (Line 7)by the Perforation Discharge (Line 10). <br /> 12 Perforations X 0.74 GPM per Perforation = �� �pM <br /> L__ <br /> 12. Setect Type of Manifold Connection (End or Center): �End ❑Center <br />