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, •� <br /> _ _ OSTP Pressure Dis#ribution - <br /> ' t1NIVERSITY " <br /> Minnesota Pollution Desi�n Worksheet OF M�NNESOTA , '� "' • <br /> Control A enc --- ��`- <br /> ProjectlD: v 1t.09.22 <br /> 1. Select Number of Perjorated Laterols tn sys[em/zone: �� _______ <br /> (2 feet fs minlmum and 3 feet is r»QxTm�m spadng) _ _ '"'"`"'""'""""' ' <br /> 2. Seiect Pe orn � ��.. _. .�- �": ,='r�`��-� o,:., _,.`sr *=Y _ "'. <br /> rj tion Spactng: � 0 p 1Y� Y1Y SnJc , ; , ���r <br /> �� �__ <br /> r�.r.�. `r � <br /> '.•�w�Ao.r�omw+aN3',���:r� t'�.��ai � �!- <br /> 3. Select Perforation D►ometer Size 7/32 in _ <br /> 6'Yl�p�t <br /> 4. Length o/Latemis ■Media Bed Length-2 Feet. ro.w.�ib„w �,.•,e•..- �,w.�.�+o,..,.xN,;r�.,�• <br /> 63 - 2fc ;= b1 ft Perjorotlon tarr not be closer then 0 foot from edge. <br /> � <br /> $• Determine the Number oj Perfnration Spaces, pivide the Length of Laterals (Line 4�by the Aerjoratlon Spartng (Line Z)and <br /> round down to the nearest whole n�nber. <br /> Number o/Perjoration Spaces;� 61 ft + �ft � 20 Spaces <br /> It_r_,_.J <br /> 6. Number of Perforotlons per Lote�c! is equal to 1.0 plus the Number of Perjoratioa Spnces (Line 5). <br /> Perfarotfons Per Lateral � � 20 Spaces + 1 = 21 Perfs.Per Lsteral <br /> theck tab(e betow to verlry the rwmber of perfprador�s per lateral guarnntees less than a 70iK dischorge varfation. The vnlue Is <br /> doubte if the a cencer monl/oid!s used. <br /> l�amaun Htnnber of Perf�r-atioru Per Latefal to Guasantez�10%o-'schargE Variatio� <br /> �,Inc,�Fc1iwatios►s 7I321ncn F?r{oradorts <br /> Perforara�Spaang lFeat) 1 �P2 Diometer(Inchesl Pe-•io�ation Spacir� Pip�aam�ter(�nches) <br /> t i1� li: 2 3 fF�tl I IV �i: 2 3 <br /> Z 1� � t3 18 30 60 2 1f 16 21 34 66 <br /> 2�� S i i2 16 28 5�1 2�i f0 1� 2D 32 W <br /> 3 8 !2 16 25 52 3 9 14 i 9 3d 6f! <br /> 3!16 hxh Pfrfora.`ions i,�8 lnch Perfortsons <br /> Pip�Diama.er�lnchesl Pc-�{oration Spxirr� Pipz Diarr�ter(l�chesl <br /> PA�ofa�ot�Spe�i�g�Feet) 1 1)'� 111 2 3 (Fe2f) 1 1y5 91: 2 3 <br /> 2 12 18 Zb �6 87 2 Z1 33 4� 7� 1�49 <br /> 2��: 12 17 Za 40 Bo 2�� 20 30 4� 69 t 3 S <br /> 3 12 96 22 37 T5 3 20 29 38 6� 12$ <br /> �• Tota!Number of Perforations equals the Number ojPerforatfaru per Latero! (Line 6}muttiplied by the Number of <br /> Perjomted CaterQ[s {Une 1). <br /> z1 Perf. Per l�teral X �Nnmber of Perf. �aterals = b3 Tota[Number of Perf. <br /> 8. Calculate the Square Feet per PerforotTon. Recomrnended votue Is 4-i0 ft� per perforation. Y ^�'�"�°"�""»�6'"'� <br /> Does not oppl y to At-Gfades q�,a�h� ^"��""O"°�` <br /> ��, 1�» f�p 1�• <br /> 8ed Area = Bed�dth(ft)X 6ed Length(ft) <br /> �.o� o.» a.� o.s. oa. <br /> 10 ft x 63 ft 63Q ft= �•� �.� �.s� �.�• �.• <br /> � ia o.0 n.s. n.w ,.o, <br /> z� o.a o.s an �.iv <br /> a.o o.a: a.n o.sr i.t� <br /> Square Foot per Perroration =Bed Area divided by the Totn!Number oj PerforaUons (L1ne 7). +.o o.r 0.0 +.n ,..� <br /> s o..i o.s> >.�� ,.0 <br /> OwtW�vAth 31161M�w�/�lnch <br /> 630 ft� = 53 perforations - 10.0 ftllpertorations "°" �+�•�� <br /> onNurqs ww,��e Mce yeNaxurs <br /> Ilett ptl�rst,Ykl�rnssaMatSTS�Mth3/16 <br /> g. Select Mlnlmum Averoge Nead: �.0 fL Mte w++���pertooiwrr <br /> s f«c eeRenefena W�and YSR wiifi tA MQ <br /> 10. Select Perjorotfon Wstharge (GPM)based on TablC III: 0.56 GPM per Perforetion <br /> 11, Retennine reQuired Flow Rate by multiplying the Toto!Numt�er of Perforatlons (Line 7)by the Perroration Dischorge (Li�e 10). <br />