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OSTP Mound Design UNIVERSITY > - <br /> Minnesota Pollution Worksheet OF MINNESOTA ;'. ���: <br /> Control Agency <br /> 1• SYSTEM SIZING: <br /> A. Design F(ow(Design Summary lA): 375 GPD Table I <br /> h10UND CONTOUR LOADING RATES: <br /> B. SOi!LOadin�R�te (Design Sum.2D): �.f10 GPD/ft2 �.:.o3surc�d ' To;Ktiira-d2riv9d Contour <br /> �orc Rate U� mound absorption ratir, Loading <br /> C. Depth to Limit9ng Condition: 2.2 ft . Rate: <br /> D. Percent Land Slope (Design Sum.28): 12.0 % �bOmpi �.o. i.3, z.a z.-�. z.h -i2 <br /> E. Design Media Loading Rote: 1.2 GPD/ftZ 51-t20 mpi oR s.o :iz <br /> F. Mound Absorption Ratio: 2.0 _ �10��,o�' �s.c -e• <br /> G. Design Contour Loading Rate: 12 GPD/ft •Systems with these values are not Type I systems. <br /> (From Design Summary 2E-same ds Linear Loading Rate) Contour Loading Rate is a recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Requfred Disperwl Bed Area:Design Flow (1.A):Design Media loading Rate (1.E)=ftZ <br /> If a larger dispersal media 375 GPD= 1.2 GPD/ft2 = 312.5 ft2 <br /> area is desired, enter size: 320 ftZ <br /> B. Calculate Dispersal Bed Width: Contour Loading Rate (1.G)=Design Media Loading Rate (1.E)=Bed Width <br /> 12 ft : 1.2 gpd/ft2 = 10.0 <br /> C. Calculate Dispersa!Bed Lenqth: DispersQ[Bed Area (2.A)=Bed Width (2.6)=Bed Length <br /> 320.0 ft2 : 10.0 ft = 32.0 it <br /> D. Setect Dispersa(Medio: � <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Catculate 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 equalty in both directions. <br /> Calculate Absorption Width Beyond the Bed:Absorption Width (3.A)-Bed Width (2.6)+2= Width beyond Bed <br /> ( N/A ft - N/A tt) : N/A = N/A ft <br /> C. For slopes>1%,the Absorption Width is measured downhilt from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Width:Absorption Width (3.A}-Bed Width (2.B)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> Comments: <br /> el.,.,n !'1 D rl,.,;�n AA.,rnr;.,l ;ee,me <br />