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OSTP Mound Design Worksheet <br /> UNIVERSITY ' <br /> Minnesota Pollution >1% Slope OF MINNESOTA ' <br /> Control Agency ✓ =4' <br /> 1. SYSTEM SIZING: Project ID: v 11.09.22 <br /> A. Design Flow(Flow Et Soil- 1.A): 750 GPD ' TABLE IXa <br /> B. Soil Loading Rate(Flow Et Soil-3.C): 0.60 GPD/ft2 LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> C. Depth to Limiting Condition: 1.8 ft Treatment Level C Treatment Level A,A-2,B, <br /> i <br /> D. Percent Land Slope: 8.0 % Absorption <br /> Loading <br /> Absorption <br /> Percolation Rate hound Mound <br /> (MPI) Area Loading Absorption Area Loading Absorption <br /> Rate Rate <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 (swim) Ratio (gOft,) Ratio <br /> F. Mound Absorption Ratio(Table IXa): 2.00 <01 - 1 - 1 <br /> !0.1 to 5 1.2 1 1.6 1 <br /> G.Design Contour Loading Rate: 12.0 GPD/ft !01 to 5(fine sand <br /> Table t land loamy fine sand) 0-6 2 1 1.6 <br /> MOUND CONTOUR LOADING RATES: '6 to 15 0.78 1.5 1 1.6 <br /> Moasured Toxturo-dorivod Contour .16 to 30 0.6 2 0.78 2 <br /> Port Rate OR mound absorption ratio LoSRg ,31 to 45 0.5 2.4 0.78 2 <br /> Roto: <br /> 146 to 60 0.45 2.6 0.6 2.6 <br /> s 60mpi 1.0, 1.3.2.0.2.4.2.6 .12 <br /> 161 to120 - 5 0.3 5.3 <br /> 61-120 mpi OR 5.0 - .-..12 ,>120 - - - <br /> 120 moi' -5.0' 6' 'Systems with these values are not Type I systems. Contour Loading Rate(linear <br /> loading rate)is a recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Required Dispersal Bed Area:Design Flow (1.A)..Design Media Loading Rate (1.E)=ft2 <br /> If a larger dispersal media area 750 GPD+ 1.20 GPD/ft2 = 625 ft2 <br /> is desired,enter size: <br /> ft2 <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (1.G)a Design Media Loading Rate (1.E)=Bed Width <br /> 12.0 ft = 1.2 gpd/ft2 = 10 ft <br /> C. Calculate Dispersal Bed Length: Dispersal Bed Area (2.A)-Bed Width (2.B)=Bed Length <br /> 625 ft2 : 10 ft = 63 ft <br /> D. Select Dispersal Media: rock <br /> E. If using a registered product,enter the Component Length: in: 12 = ft <br /> F. If using a registered product,enter the Component Width: in: 12 = ft <br /> G. Number of Components per Row =Bed Length (2.C)divided by Component Length (4.J) (Round up) <br /> ft : ft= components/row <br /> H. Number of Rows =Bed Width (2.B)divided by Component Width (4.K) (Round up) Note:CLR of 10.3 <br /> gal/ft results in 9 foot <br /> Adjust Contour Loading Rate on Design Summary page until this number is a whole number wide bed. <br /> ft: ft= rows <br /> I. Total Number of Components =Number of Components per Row X Number of Rows <br /> X = components <br />