2001-P04627 - new septic - Laserfiche WebLink

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• PRESSURE DISTRIBUTION SYSTEM - Trenches c::,-.;e.,.:.�.-r.,ti.,� �r�.�.�_[.�t�e^��[r��..t�n�^T_'t��rc�ms¢i�tnrr� � _ n�(._cr._.��_�.�.�,�.,�;�xi-,�.F...�i,.�__ - AU boxed rectang/es must be entered,the rest wip be calculated. � � � �r ,��.�,k r.�rr s:;,.�.,K�i�F••-i i r - t'url.`:i.�.�a'��iK 1.4•�S• 1. Select number of perforated laterals: 03 2. Select perforation spacing= 03 ft �E4: Mnknum utl«ido nunbet uf 1!4-inch W�rlaufas pw wlaa b sR�a�,tea<lox�Ascr.xWe v«Icflia, 3. Since perforations should not be placed closer that 1 foot to �"�`�°� �ia s the edge of the rock layer(see diagram), subtract 2 feet from L a��n ��:►� �.�st�r,_ ►.s��,�, ?.o��.:n � the rock la er len th � zs � e ,d � ,a ,a 75 -2ft= 73 ft � 3.� s �s n se rock layer length . i '3 ' '? '6 �s ' 60 7 17 15 23 l.�5� -_b�._ �� _1Q � 22.^_ 4 Determine the numbe�of spaces between perforaGons. Divide the length(3)by perforation spacing(2)and round down to nearest whole number. Perforation spacing= 73 ft/ 3 ft= 24 spaces 5. Number of perforations is equal to one plus the number of perforation spaces(4). 'Check figure E-4 to assune the number of per/orations per lateral guarantees < 10'/discharge variation. 24 spaces+ 1 = 25 perforations/lateral 6. A.Total number of pertorations=perforations per lateral(5)times number of laterals(1). 25 perfs/lat x 3 laterals= 75 perforations 10-13 varies �-b: Pe�tora�or�E�lssricw�o hf s�m B.Calculate the square footage per perforation. "- "-' Should be 6-10 sqft/perf. Does not apply to at-grades. p��foratron diarrn3ter ne-ad (iric;hes 1. Rock bed area=rockwidth(ft)x rock length(ft) ��e�y i� 31�G �f32 }!� 10 ft x 75 ft= 750 ft2 1.p� o.l s e.a2 G�.SG o.74 2. Square foot per perforation= Rock Bed Area/number of perfs(6) 750.0 ft� / 75 perfs = 10.0 ft/perf 2•Ob G.25 0.59 0.80 t.04 5.0 L�.dl Q.94 1.26 1.65 7. Detertnine required flow rate by multiplying the total number -�;;5;�t.�;r,__.I i�_i aiir�I�%�!�tffiYy t„_,-,=5. of pertorations(6A)by flow per erforations(see figure E-6) t';�,�:-.��<.,..j�,.:t�i�.: ��T°=.. 75 perfs x 0.56 gpm/perfs= 42 gpm _ 8. If laterals are connected to header pipe as shown _ -- ��"-,';' ^�V in Figure E-1,to select minimum required lateral - `�� --.: diameter,enter figure E-4 with perforation spacing(2)and ' �� ` ` -: =�'• number of pertorations per lateral(5). � . � �`" , i ,:,. � Hqur�E-1:MonHdd LxW�d ot End o1 6Y��m ' � .. _._...__..._.._._._.._.__...__......--....__...---_.._._._�_...._..._------'-- Select minimum diameter for perforated laterals= NA inches � -------------------------------._.__...._____ 9. If perforated lateral system is attached to manifold pipe Na,�E-z:M�ad�� - - •y�=-� �n tAo Center d p�e 6�nlam .,..:� near the center, like Figure E-2, pertorated lateral length(3) . - and number of perforations per lateral(5)will be approximately � 5^ - ="' one half of that in step 8. Using these values, select - � - ,=. r minimum diameter for pertorated lateral= 1.5 inches. •` `�---- , I hereby certify that I ha completed this work in accordance with all applicable ordinances,rules and laws. �:�� (signature) �Q� (license#) C� �s�� (date)