Laserfiche WebLink
Minnesota PolluMm <br /> Mound Design Worksheet _ A � <br /> Control Agency <br /> 1• SYSWM SMNG.- <br /> A. <br /> MNGcA. Design Flow(Flow B Soil- 1.A) : 450 GPD Table I <br /> B. Soil Loading Rate(Flow Ft Soil-3.C): 0.60 GPD/ftp FUND CONTOUR LOADING RATES: <br /> Measured Texture-derived Contour <br /> C. Depth to Limiting Condition: 1.8 ft pert Rate OR mound absorption ra Loading <br /> Rate: <br /> D.Percent Land Slope: $•0 % 60mpi 1.0, 1.3,2.0,2.4,2.6 -- s12 <br /> E. Design Media Loading Rate: 1.2 •- <br /> 61-120 mpi OR 5.0 s6 <br /> F. Mound Absorption Ratio(1.E+1.B): 2.00 <br /> =120 mpi <br /> G.Design Contour Loading Rate: 12-0 GPD/ft - - <br /> (Fram Table 1-same as Linear Loading Rate) <br /> 2. DISPERSAL MEDIA SMNG <br /> A. Calculate Required Dispersal Bed Area:Design Flow (1.A)+Design Media Loading Rate (1.E)=ft2 <br /> 450 GPD+ L20 GPD/ftZ = 375.0 fe <br /> If a larger dispersal media �-� <br /> area is desired,enter size: ftp <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (14)+Design Media Loading Rate (1.E)=Bed Width <br /> 12.0 ft + 1.2 gpd/fe _ 10.0 ft <br /> C. Calculate Dispersal Bed Length: Dispersal Bed Area (2.A)+Bed Width (2.8)=Bed Length <br /> 375.0 fe +L 1050., ft = 37:5 ft <br /> D. Select Dispersal Media: O Rock <br /> E3 Other Approved Media <br /> 3. ABSORPTION AREA SMNG <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.8)X Mound Absorption Ratio (1.F)=Absorption Width <br /> 10.0 It X 2:0 _ 20.fl 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.B)-*2=Width beyond Bed <br /> ( ft - ft) + = ft <br /> C. For slopes>1%,the Absorption Width is measured downhill from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Width:Absorption Width (3.A)-Bed Width (2.6)=ft <br /> 20.0 ft - 10.0 ft = iflA ft <br /> Comrnertc <br />