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OSTP Mound Design jJNIVERSITY <br /> Minnesota Poilution Worksheet OF MINNESOTA � �` <br /> Controi Agency A�- <br /> 1• SYSTEM SIZING: <br /> A. Design Ftow(Design Summory tA): 750 GPD 7anie� <br /> MOUND CONTOUR Li�AUING RATES: <br /> B. Soil Lovding Rate (Design Sum.2D): �.�i0 GPD/ftZ h;oasured " Texturc-derivc�d Contour <br /> Perc Rate UF mound atrw�ption ratio Loading <br /> C. Depth to Limiting Condition: 1.3 ft . �ta: <br /> D. Percent Land S(ope (Design Sum. 28): 2,0 % =�mp; �.u, i.3.z.o.z..,.z.� _iz <br /> E. Oesign Media Loading Rate: 1.2 GPD/ft2 5t-120 mpi oR S.G -12 <br /> F. Mound Absorption Ratio: 2.0 = �zo��,P,• -s.o• _a• <br /> G. Design Contour Loading Rote: 12 GPD/ft �Systems with these vatues 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 Dispersal 8ed Area:Design F(ow (1.A):Design Media Lovding 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. Calcu►ate Dispersal Bed Width:Contour Loading Rate (1.G)=Design Media Loading Rote (1.E)=Bed�dth <br /> 12 ft : 1.2 gpd/ftZ = 10.0 <br /> C. Catcutate Dispersal Bed Length: Dispersa(Bed Area (2.A):Bed Width (2.6)=Bed Length <br /> 630.0 ftZ : 10.0 ft = 63.0 ft <br /> D. Select Disperw(Media: � <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks are meosured from the Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.6)X Mound Absorption Ratio (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 equally in both directions. <br /> Calcutate Absorption Width Beyond the Bed:Absorption�dth (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 meawred downhill from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Widti►:Absorption Width (3.A) -Bed Width (2.6j=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> Comments: <br /> Stope, CLR Choice,Material issues <br />