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OSTP Mound Design Worksheet <br /> Minnesota Pollution UNIVERSITY <br /> Control Agency >1% Slope OF MINNESOTA <br /> 1. SYSTEM SIZING: Project ID: v 11.09.22 <br /> A.Design Flow(Flow&Soil-1.A): 750 GAD 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-2,8. <br /> D.Percent Land Slope: 4.0 % Percdathn Rate �' d0" Nound °�OrptiOn Mound <br /> area Loading Area Loading <br /> E.Design Media Loading Rate: 1.2 GPD/ft2 ? Rate a'SO7PC1O" Rate <br /> ��,I Ratio (aPd/1t') Rstlo <br /> F.Mound Absorption Ratio(Table IXa): 2.00 <br /> G.Design Contour Loading Rate: 12.0 GPD/ft (1.1 <br /> t95 1.2 1 1.6 <br /> 1 to 5(fine sand 0.6 2 1 1.fi <br /> Table' loo fine sa <br /> -MOUND CONTOUR LOADING RATES: i6 to 15 0.78 1.5 1 1.6 <br /> Moastrod Texturo•d9rivad Contour 16 to 30 0.6 2 0.78 2 <br /> Po Rat9 OR mound absorption ratio Loading <br /> Rato: I 31 to 45 0.6 2.4 0.78 2 <br /> dOmpi 1.0,t.3,2.0,2.4,2.6 ¢12 46 to 60 0.45 2.6 0.6 2.6 <br /> �61 to 120 - 6 0.3 6.3 <br /> 61.120 anpi OR 5.0 Z12 >120 _ <br /> t 120 mpi' :5.0' ib <br /> *Systems with these values are not Type I systems. Contour Loading Rate(Einear <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: ft, <br /> B. Calculate Dispersal Bed Width:Contour Loading Rote (1.45)+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: L�In+ 12 - E:==ft <br /> G.Number of Components per Row=Bed Length (2.C)divided by Component Length (4.J)(Round up) <br /> ft e 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 /> Adjust Contour Loading Rate on Design Summa gal/ft results in 9 foot <br /> J g g Summary page until this number is a whole number wide bed. <br /> ft+ C� ft= I� rows <br /> I. Total Number of Components -Number of Components per Row X Number of Rows <br /> X E- - E=components <br />