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OSTP Mound Design (JNIVERSITY -' <br /> Minnesota Pollution Worksheet OF MINNESOTA ����^� <br /> Control Agency <br /> 1• SYSTEM SIZING: <br /> A. Design F(ow(Design Summary 1A): 750 GPD T"ni�i <br /> l.10UND CONTOUR lOADiHG R.1TE5: <br /> B. Soit Loading Rate (Design Sum.2D): 0.60 GPD/ftZ . Contour <br /> r:,c_.asur?d O� Ta:.tur9•derive� Loading <br /> aarc R.atn mound ahsorption�acio <br /> C. Depth to Limiting Condition: 1.7 ft . R�tp: <br /> D. Percent Land Slope (Design Sum. 26): 14.0 ry `f'��„�� �-o, �.3. z o. �..�. z<, _;z <br /> E. Design Media Loading Rate: 1.2 GPD/ftZ '��-���'mpi ��;n s.o c s z <br /> F. Mound Absorption Ratio: 2.0 _ ��u��,�;• .s.o• :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 as Linear Loading Rate) Contour Loading Rate is a recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Catculate Required Dispersv(Bed Areo:Design F(ow (1.A):Design Medin Loading 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 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 Dispersal Bed Length: Dispersol Bed Area (2.A)=Bed Width (2.B)=Bed tength <br /> 630.0 ftZ = 10.0 tt = 63.0 ft <br /> D. Select Dispersa(Media: -� <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks a�e measured 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 /> Calculate 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 /> Catculate Downs(ope Absorption Width:Absorption Width (3.A) -Bed Width (2.B)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> Comments: <br /> S(ope, CLR Choice,Materie(issues <br />