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i 1 <br /> OSTP Mound Design Worksheet <br /> UNIVERSITY litik., <br /> Minnesota Pollution >1% Slope OF MINNESOTA <br /> Control Agency '.':. ..),.•`�'" <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: 1.2 ft Treatment Level C Treatment Level A,A-2,B, <br /> D. Percent Land Slo e: 7.0 Percolation Rate AbsorptionMound A'SOn'L1O" Mound <br /> p % Area Loading Area Loading <br /> (MPI) Rate Absorption Rate Absorption <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 (spdift) Ratio (gpd/ft=) Ratio <br /> F. Mound Absorption Ratio(Table IXa): 2.00 <01 - 1 - 1 <br /> G.Design Contour Loading Rate: 12.0 GPD/fto1 10 1.2 1 1.6 1 <br /> '0 i to 5(fine sand 0.6 2 1 1.6 <br /> Table I and loamy fine sand) <br /> MOUND CONTOUR LOADING RATES: 610 15 0.78 1.5 1 1.6 <br /> M4asurod Toxturo-derived Contour 16 to 30 0.6 2 0.78 2 <br /> Parc Rate OR mound absorption ratio Loading <br /> p Rate: 31 to 45 0.5 2.4 0.78 2 <br /> 46 to 60 0.45 2.6 0.6 2.6 <br /> 60mp: 1.0. 1.3.2.0.2.4.2.6 - =12 <br /> 61 to 120 - 5 0.3 5.3 <br /> 61.120 mpi OR 5.0 • x 12 >120 _ - - <br /> 120 mpi -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 4- 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: 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 (2.8)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 />