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OSTP Mound Design Worksheet <br /> UNIVERSITY ;'ag <br /> Minnesota Pollution <br /> >1% Slope OF MINNESOTA �> <br /> Control Agency <br /> I. SYSTEM SIZING: Project ID: v 11.09.22 <br /> A.Design Flow(Flow tr Soil- 1.A): 450 GPD TABLE IXa <br /> B. Soil Loading Rate(Flow 8 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: 1.7 ft Treatment level c Trenmen revel A,A-2,B, <br /> D.Percent Land Slope: 1 11.0 % percolation ane Absorption Absorption <br /> Area Loading Mound Area Loading mound <br /> (MR) Rate Absorption Rate A�sorpeton <br /> E.Design Media Loading Rate: 1.2 GPD/ft2 (Wdtf,) ant° (Wdm.,) Gado <br /> F.Mound Absorption Ratio(Table Ma): 2.00 <0.1 - 1 - 1 <br /> G.Design Contour Loading Rate: 12.0 GPD/ft 0.1 to 5 1.2 1 1.6 1 <br /> 0.1 to 5(fine sand 0.6 2 1 1.6 <br /> Table I and ba fire sa <br /> MOUND CONTOUR LOADING RATES: 6 to 15 0.78 1.5 1 1.6 <br /> Moasurod Toxturo-dorivod contour 116 to 30 0.6 2 0.78 2 <br /> port Rate OR mound absorption ratio Loading 31 to 45 0.5 2A 0.78 2 <br /> Roto: <br /> 46 to 60 0.45 2.6 0.6 2.6 <br /> 560mpi 1.0. 1.3.2.0.2.4.2.6 s12 <br /> 61 to 120 - 5 0.3 5.3 <br /> 61-120 mpi OR 5.0 12 -120 - - <br /> 120 mpi• -5.0' _6' 'System 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 450 1 GPD: 1.20 GPD/1`1:2 = 375 ft2 <br /> is desired,enter size: Ift2 <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (1.G)=Design Media Loading Rate (1.E)-Bed Width <br /> 12.0 Ift = 1.2 gpd/ft2 = 10 ft <br /> C. Calculate Dispersal Bed Length: Dispersal Bed Area (2.A):Bed Width (2.8)=Bed Length <br /> 375 ft2 : 10 ft = 38 ft <br /> D.Select Dispersal Media: <br /> E. If using a registered product,enter the Component Length: 73n: 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)(Ronald up) <br /> IIft = ft= components/row <br /> H.Number of Rows =Bed Width (2.6)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 /> I X C= components <br />