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OSTP Mound Design Worksheet , z <br /> Minnesota Pollution p UNIVERSITY 4`` <br /> 1% Slope OF MINNESOTA <br /> Control Agency `�� <br /> 1. SYSTEM SIZING: Project ID: v 12.08.06 <br /> A.Design Flow: 750 GPD TABLE IXa <br /> B. Soil Loading Rate: 0.60 GPD/ft2 'LOADING RATES FOR DETERMINING BOTTOM ADSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> C.Depth to Limiting Condition: 1.7 ft Treatment Level C Treatment Levet A,A-2,e, <br /> D.Percent Land Slope: 7.0 Percolation Rate Absorption Mound Absorption hound <br /> % I, Area i.0adin; Area Loading <br /> E►+P11 Rate Absorption Rate Absorption <br /> i E. Design Media Loading Rote: 1.2 GPD/ft2 (rmd `) Ratio (gPdne) Ratio <br /> F.Mound Absorption Ratio(Table IXa): 2.00 j<01 - 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 land loamy fine sand) <br /> MOUND CONTOUR LOADING RATES: 116 to 15 0.78 1.5 1 1.6 <br /> Moasurod Texture-dor-Nod od Contour 16 to 30 0.6 2 0.78 2 <br /> 9.81K Rate OR mound absorption ratio Loadie;ng 31 to 45 0.5 2.4 0.78 2 <br /> Rat <br /> 146 to 60 0.45 2.6 0.8 2.6 <br /> s 60ntpi 1.0,1.3,2.0.2.4,2.6 • s12 <br /> i61 to 120 - 5 0.3 5.3 <br /> 61.120mpi OR 5.0 • :12 1>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= 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. Enter 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 6 12 = ft <br /> G.Number of Components per Row =Bed Length (2.C)divided by Component Length (4.J) (Round up) <br /> ft a ft= components/row <br /> H. Number of Rows =Bed Width (2.B)divided by Component Width (4.K)(Round up) <br /> Adjust Contour Loading Rate on Design Summary page until this number is a whole number. Note:CLR of 10.8 gal/ft results in 9 foot 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 />