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OSTP Mound Design Worksheet <br /> Minnesota Pollution p/ UNIVERSITY <br /> Control Agency >1 Slope OF MINNESOTA ` �. <br /> 1. SYSTEM SIZING: Project ID: v 12.08.06 <br /> A.Design Flow: 750 GPD I TABLE IXa <br /> B. Soil Loading Rate: 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 ft Treatment Level C Treatment Level A,A-2,6, <br /> D. Percent Land RaSlope: 7.0 Percolation Rate Absorptioon Mound Absorption Mound <br /> p % (MPI) Arearea Loading Absorption Area ace Loading Absorption <br /> E. Design Media Loading Rate: 1.2 GPD/ft2Rate <br /> ( ft') Ratio ( IT1) Ratio <br /> F. Mound Absorption Ratio(Table IXa): 2.00 eO 1 - I - 1 <br /> 0.1 to 5 1.2 1 1.6 1 <br /> G.Design Contour Loading Rate: 12.0 GPD/ft <br /> 101 to 5(fine sand 0.6 2 1 1.6 <br /> Table I land foamy fine sand) <br /> MOUND CONTOUR LOADING RATES: I6 to 15 0.78 1.5 1 1.6 <br /> Measured Toxturo-derived Contour 116 to 30 0.6 2 0.78 2 <br /> Perc Rate OR mound absorption ratio Loading 131 to 45 0.5 2.4 0.78 2 <br /> Rate: I <br /> 48 to 60 0.45 2.6 0.6 2.6 <br /> .60mpi 1.0. 1.3,2.0.2.4.2.6 • c12 <br /> 1,61 to 120 - 5 0.3 5.3 <br /> 61-120 mpi OR 5.0 • _12 >120 - - - <br /> _120 mpi' .5.0' • r6' '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)i 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: <br /> ft2 <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (1.G)s 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 s 12 = ft <br /> F. If using a registered product,enter the Component Width: in s 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 />