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• <br /> OSTP Mound Design UNIVERSITY :' ' <br /> illhia <br /> Minnesota Pollution Worksheet > 1 % Sloe OF MINNESOTA <br /> Control Agency r �-� <br /> 1. SYSTEM SIZING: Project ID: v 07.14.15 <br /> A. Design Flow: 600 GPD TABLE IXa <br /> B. Soil Loading Rate: 0.45 GPD/ft2 LOADING RATES BOTTOM ABSORPTION AREA <br /> ANP ABSORPTIONFORDETERMINING RATIOS USING PERCOLATION TESTS <br /> Treatment Level C Treatment Level A,A•2,B, <br /> C. Depth to Limiting Condition: 1.5 ft <br /> Absorption Absorption <br /> Percolation Rate Mound Mound <br /> Area Loading Area Loading <br /> D. Percent Land Slope: 9.0 % (MPI) Rau Absorption Rate Absorption <br /> (gpd/ft') Ratio (gift:) Ratio <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 <01 - 1 - 1 <br /> F. Mound Absorption Ratio: 2.60 01to5 1.2 1 1.6 1 <br /> 0 1 to 5(line sand 0.6 2 1 1.6 <br /> Table I and loamy line sand) <br /> MOUND CONTOUR LOADING RATES: 610 15 0.78 1.5 1 1.6 <br /> Contour 1s to 30 0.6 2 0.78 2 <br /> Moasurod • Toxturo-darivad <br /> Parc Rata OR mound absorption ratio Loading 31 to 45 0.5 2.4 0.78 2 <br /> Rate: 46 to 60 0.45 2.6 0.6 2.6 <br /> 6Ompi 1.0, 1.3. 2.0. 2.4. 2.6 . :12 67 to 120 5 0.3 5.3 <br /> >120 <br /> 61.120 nlpi OR 5.0 • -12 *Systems with these values are not Type I systems. <br /> _ 120 nlpi' S.G' _6• Contour Loading Rate (linear loading rate) is a <br /> recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Dispersal Bed Area: Design Flow : Design Media Loading Rate =ft2 <br /> 600 GPD : 1.2 GPD/ft2 = 500 ft2 <br /> If a larger dispersal media area is desired, enter size: ft2 <br /> B. Enter Dispersal Bed Width: 10.0 ft Can not exceed 10 feet <br /> C. Calculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> 10 ft2 X 1.2 GPD/ft2 = 12.0 gal/ft Can not exceed Table 1 <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area : Bed Width = Bed Length <br /> 500 ft2 _ 10.0 ft = 50.0 ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Calculate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> 10.0 ft X 2.6 = 26.0 ft <br /> B. For slopes >1%, the Absorption Width is measured downhill from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Width: Absorption Width - Bed Width <br /> 26.0 ft - 10.0 ft = 16.0 ft <br /> 4. DISTRIBUTION MEDIA: ROCK <br /> A. Media Volume: Media Depth X Length X Width <br /> 0.75 ft X 50.0 ft X 10.0 ft = 375 ft3 _ 27 = 14 yd3 <br />