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OSTP Mound Design Worksheet <br /> UNIVERSITY <br /> Minnesota Pollution <br /> Control Agency >1% Slope OF MINNESOTA 4 ,�,\.;� <br /> 1. SYSTEM SIZING: Project ID: v 11.09.22 <br /> A.Design Flow(Flow&Soil- 1.A): 750 GPD TABLE IXa <br /> B. Soil Loading Rate(Flow&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: 1.5 ft Treatment Level C Treatment Level A,A-2,B, <br /> D.Percent Land Slope: 5.0 % Absorption Peromauon Rate k s MoundArea wadi... <br /> Absor Absorption Mound <br /> Rate Rate Absorption <br /> E.Design Media Loading Rate: 1.2 GPD/ft2 (MAW/ Ratio (Wdifei Ratio <br /> F.Mound Absorption Ratio(Table IXa): 2.00 j o 1 - i - 1 <br /> '0.1 to 5 1.2 1 1.6 1 <br /> G.Design Contour Loading Rate: 12.0 GPD/ft <br /> 0.1 to 5(fine sand 0.6 2 1 1.6 <br /> Table I lard loamy tine sand) <br /> MOUND CONTOUR LOADING RATES: 6 to 15 0.78 1.5 1 1.6 <br /> Measured • Texture-derived Conten 16 to 30 0.6 2 0.T8 2 <br /> Pert Rate OR mound absorption ratio Loading 131 to 45 0.5 2.4 0.78 2 <br /> Rate: <br /> 46 to 60 0.46 2.6 0.6 2.6 <br /> 5 60mpi 1.0.1.3.2.0.2.4.24 • ±12 <br /> 61to120 - 5 0.3 6.3 <br /> 61-120 mpi OR 5.0 -. ±12 >120 - - <br /> 120 nlpi' >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: 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 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: <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 /> in <br /> Adjust Contour Loading Rate on Design Summary page until this number is a whole number gal/ft results wide bed..j 9 foot <br /> ft+ ft= rows <br /> I. Total Number of Components =Number of Components per Row X Number of Rows <br /> X = components <br />