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OSTP Mound Design Worksheet <br /> _- UNIVERSITYag <br /> Minnesota Pollution >1% Slope OF MINNESOTA k <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&Sofl-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: 1.7 it Treatment Levet c Treatment.Levet A,A•2,B, <br /> D.Percent Land Slope: 8.0 % Perootation hate AbsorptionArm ng MoundA ,5toww <br /> 04n) Rate Absorption ane Absorption <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 ter) Ratioty =) o <br /> F. Mound Absorption Ratio(Table Ka): 2.00 , - <br /> G.Design Contour Loading Rate: 12.0 GPD/ft °'to s 1.2 1 i s 1 <br /> I0.1 to 5(fine sand 0.6 2 1 1.6 <br /> Tablet and Wrrw fine sa <br /> MOUND CONTOUR LOADING RATES: to 15 0.78 1.5 1 1.6 <br /> Moasurad Toxchm-dorivod Contour 16 to 30 0.6 2 0.78 2 <br /> porc Rato OR mamd absorption ratio Loading 31 to 45 0.5 2A 0.78 2 <br /> s60n1pi 1.0.1.3,2.0.2A,2.6 s12 46to60 0.45 2.6 0.6 2.6 <br /> 61 to 120 - 5 0.3 5.3 <br /> 61-120 ntpi OR 5.0 c12 >120 _ _ _ <br /> 120 mpi• >5.0' 46' 'Systems with these values are not Type 1 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: Ife <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 it <br /> C. Calculate Dispersal Bed length: Dispersal Bed Area (2.A)+Bed Width (2.B)=Bed Length <br /> 625 Ift2 + 10 ft = 63 ft <br /> D. Select Dispersal Media: Rock <br /> E. If using a registered product,enter the Component Length: --]in+ 12 - F7 771ft <br /> F. If using a registered product,enter the Component Width: 7-in+ 12 = ft <br /> G.Number of Components per Row=Bed Length (2.C)divided by Component Length (4.J)(Round up) <br /> oit = it= components/row <br /> H.Number of Rows =Bed Width (2.11)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+ ft= �� rows <br /> I• Total Number of Components -Number of Components per Row X Number of Rows <br /> IX [� = E==components <br />