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� OSTP Mound Desi�n <br /> �' � LTNIVERSITY � �� � <br /> Minnesota Poilution W��"kShC�t ��� S���e OF MINNESOTA � ,,,�,�� <br /> Cartro!Agency <br /> 1. SYSTEM SIZING.` <br /> A. Design Flow(Flow&Soit- 1.A) : �5U GPD TaWe 1 <br /> tu�otJNt1 tt�NT�UUR i.OnU�t+t�ttA1'ES: <br /> B. Soi!Loading Rnte(F(ow 8 Soit-3.C): Q.7$ GPD1ft2 �Qawred ��xwr���riv�a cont«,r <br /> eerc w,te � rnour�d absorpt�n �►s <br /> C. DPpth to lim3ting Comiition: 2.2 ft �tQ: <br /> D. Percent l.Qr�d Slope: 5.0, % s�om�i �.o, �.a,i.o,Z.a,i.b -- ��a <br /> E. Design Media Looding Rate: 1.2 GPD/ft2 6i-iu�mpi aR s.o s�i <br /> F. Mound Absorption Ratio(1.E=1.B): i.54 z�zo mpr >s.o• - se• <br /> G. Design Contour LoQding Rate: 12.0 GPD/ft ,Systerm with these values are not Type 1 systems. <br /> (From Tabte 1 -same as Linear Loading Rate) Contour Loading Rate is a recanmended vatue. <br /> 2. DISPERSAL MEDIA S{ZING <br /> A. Catcutate Required Dispersat Bed Areu:Design Flow (1.A) =Design Media Loadir►g Rate (1.E)=ft2 <br /> if a ta�er dispersal media 450 GPD�- 1.20 GPD/ft2 = 375.0 - ft2 <br /> area is desired, enter size: 380:0 ftZ <br /> B. Calculate Dispersat Bed Width: Contour Loading Rnte (1.G) =Design Media Loading Rate (1.E) =Bed�dth <br /> 1 Z,0 ft = 1.2 gpdiftZ = 10A ft <br /> C. Catculate Dispersat Bed Length: Dispersat 8ed Area (2.A)=8ed Width (2.B)=Bed Length <br /> 380.0 ft� : 10.0:; ft = 38.0 ft <br /> D. Select Dispersu!Media: O Rock <br /> ❑Other Approved Media r� <br /> 3. ABSORPI'tON AREA SIZING <br /> Note:Mound setbocks are meawred from the Absorption Area. <br /> A. Catculate Absorptiort�dth:Bed�dth (2�6)X Mound Absorption Ratio (1.F?=Absorption�dth <br /> 10.0 ft X 1.5' = 15.4 ft <br /> B. For stopes>1%, the Absorptfon �dth is measured downhitt from the upstope edge of the Sed. <br /> Calcutate Downslope Absorption �dth:Absorption Width (3.A) -Bed 1A�idth (2.6)=ft <br /> 15.4 ft - 10.0 ft = 5.4 ft <br /> Comments: <br /> Slope, CLR Choice,Materint issues <br />