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OSTP Mound Design UNIVERSITY - \ <br /> Minnesota Pollution Worksheet OF MINNESOTA �`'� <br /> Controt Agency `'��`�� <br /> 1• SYSTEM SIZING: <br /> A. Design Ftow(Design Summary lA): 75� GPD Table I <br /> hi+?UND CONTOUR LdAGING ILITES: <br /> B. 5oil Loading Rote (Design Sum.2D): �.6� GPD/ft2 ntoasured ' To:cture-derived Contour <br /> Perc Rato OR mound aoso.p[ir,n ratio Loadin; <br /> C. Depth to Limiting Condition: 1.8 ft , Rat9: <br /> D. Percent Land Slope (Design Sum. 2B): 5.0 % =F��»P> >.o, i.3. z.o.z.-�. z� <iz <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 ��-�Zu mpi e� s.a _iz <br /> F. Mound Absorption Ratio: 2.0 > >�,,,,,p;- :s.,;� <h• <br /> G. Design Contour Looding Rate: 12 GPD/ft •Systems with these values are not Type I systems. <br /> (From Design Summary 2E-same as Linear Loading Rate) Contour Loading Rate is a recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Required Dispersa(Bed Areo:Design Flow (1.A)=Design Medio Looding Rate (1.E)=ftZ <br /> If a larger dispersal media 750 GPD= 1.2 GPD/ftZ = 625.0 ftZ <br /> area is desired, enter size: 630 ft2 <br /> B. Calcutate Dispersol Bed Width: Contour Loading Rote (1.G)=Design Medio Looding Rate (1.E)=8ed Width <br /> 12 ft : 1.2 gpd/ftZ = 10.0 <br /> C. Calculate Dispersat Bed Length: Dispersol Bed Areo (2.A)-Bed�dth (2.6)=Bed Length <br /> 630.0 ftZ : 10.0 fc = 63.0 ft <br /> D. Select Dispersal Media: <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calcutate Absorption Width:Bed Width (2.6)X Mound Absorption Rotio (1.F)=Absorption Width <br /> 10.0 ft X 2.00 = 20.0 ft <br /> B. For slopes from 0 to 1%, the Absorption Width is measured from the bed equatly in both directions. <br /> Calcutate Absorption Width Beyond the Bed:Absorption Width (3.A) -Bed Width (2.6)=2= Width beyond Bed <br /> ( N/A ft - N/A ft) = N/A = N/A ft <br /> C. For slopes>1%, the Absorption Width is measured downhill from the upslope edge of the Bed. <br /> Calculate Downs(ope Absorption Width:Absorption Width (3.A)-Bed Width (2.6)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> Comments: <br /> Slope, CLR Choice,Moterial issues <br />