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OSTP Mound Design Worksheet <br /> UNIVERSITY <br /> Minnesota Pollution <br /> Control Agency >1% <br /> / Slope OF MINNESOTA <br /> 1• SYSTEM SIZING: Project ID: v 11.09.22 <br /> A. Design Flow(Flow rt Soil- 1.A): 750 GPD i TABLE IXa <br /> B. Soil Loading Rate(Flow ft 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 Levet C Treatment Level A,A-2,B, <br /> D. Percent Land Slope: 4.0 % Percolation Rate Absorption Mound Absorption Moura <br /> (MPI) Are Raoading Absorption Area aeding AbsorptionE. Design Media Loading Rate: 1.2 GPD/ft2 (stain,) Ratio (gpdrft,) Ratio <br /> F.Mound Absorption Ratio(Table IXa): <br /> G.Design Contour Loading Rote: 12.0 GPD/ft !a 1 to 5 1.2 1 1.6 1 <br /> �0.1 to 5{tine sand 0 6 2 1 1.6 <br /> Table I aril loe tine santl <br /> MOUND CONTOUR LOADING RATES: !8 to 15 0.78 1.5 1 1 6 <br /> awasurod Toxturo-darivod Contoui 16 to 30 0.6 2 0.78 2 <br /> Porc Rate OR -nound absorption ratio Loading 131 to a 0.5 2.4 0.78 2 <br /> Rata: <br /> -60mpi 1.0. 1.3.2.0.2.4.2.6 c12 46 to 60 0.45 2.6 0.6 2.6 <br /> :61 to 120 _ 5 0.3 5.3 <br /> St-IZO mpi UR 5.0 c12 10 <br /> 120 n)pi' 7 <br /> 0' -5' '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)-W, <br /> If a larger dispersal media area 750 GPD= 1.20 GPD/ft' = 625 ft <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)4 Bed Width (2.B)=Bed Length <br /> 625 ft2 - 10 it = 63 ft <br /> D. Select Dispersal Media <br /> E. If using a registered product,enter the Component Length: I 12 = ft <br /> F. If using a registered product,enter the Component Width: 1 lin a 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/raw <br /> H. Number of Rows =Bed Width (2.B)divided by Component Width (4.K)(Round up) Note:CLR of 10.3 <br /> Adjust Contour Loading Rate on Design Summary page until this number is a whole number gal/ft results in 9 footwide bed. <br /> ft a it= -J rows <br /> 1, Total Number of Components -Number of Components per Row X Number of Rows <br /> X _ L=components <br />