Laserfiche WebLink
UNIVSSSIIY OF MINNESI M <br /> Mound Design Worksheet L � X113 <br /> Minnesota Pollution ppb <br /> Control Agency "' �"�►.,, <br /> 1. SYSTEM SIZING: <br /> A. Design Flow(Flow&Soil- 1.A) : 600 GPD <br /> Table <br /> B. Soil Loading Rate(Flow&Soil-3.C): 0.60 GPD/ft2 MOUND CONTOUR LOADING RATES: <br /> Measured Texture-derived Contour <br /> C. Depth to Limiting Condition: 1.0 ft Perc Rate OR mound absorption ratio Loading <br /> Rate: <br /> D. Percent Land Slope: 6.0 % <_60mpi 1.0, 1.3,2.0,2.4,2.6 • 112 <br /> E. Design Media Loading Rate: 1.2 <br /> 61-120 mpi OR 5.0 • .6 <br /> F. Mound Absorption Ratio(1.E+1.B): 2.00 <br /> z120mpi <br /> G. Design Contour Loading Rate: 12.0 GPD/ft <br /> (From Table I-same as Linear Loading Rate) <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Required Dispersal Bed Area:Design Flow (1.A)+Design Media Loading Rate (1.E)=ft2 <br /> 600 GPD+ 1.20 GPD/ft2 = 500.0 ft2 <br /> If a larger dispersal media <br /> area is desired,enter size: ft2 <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (1.G)+Design Media Loading Rate (1.E)=Bed Width <br /> 12.0 ft + 1.2 gpd/ft2 = 10.0 ft <br /> C. Calculate Dispersal Bed Length: Dispersal Bed Area (2.A)+Bed Width (2.B)=Bed Length <br /> 500.0 ft2 + 10.0 ft = 50.0 ft <br /> D. Select Dispersal Media: 0 Rock <br /> 0 Other Approved Media <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.B)X Mound Absorption Ratio (1.F)=Absorption Width <br /> 10.0 ft X 2.0 = 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.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.B)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> Comments: <br />