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OSTP Mound Design <br /> UNIVERSITY <br /> Minnesota Pollution Worksheet > 1 % Slope OF MINNESOTA <br /> Control Agency <br /> 1. SYSTEM SIZING: Project ID: v 03.19.15 <br /> A. Design Flow: 600 GPD TABLE IXa <br /> 2 I LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> B. Soil Loading Rate: 0.45 GPD/ft I AND ABSORPTION RATIOS USW5 PERCOLATION TESTS <br /> E ram&*Level C reabou t level A.A-2.6. <br /> T <br /> C. Depth to Limiting Condition: 1.7 ft TA <br /> Peraoladon We §)9 <br /> Mound dayL"dit MouldD. Percent Land Slope: 7.0 % 1""PI? AbaO�enRate Raio wdowI Rai° <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 <br /> F. Mound Absorption Ratio: 2.bQ '"° 1.2 1 1.6 1 <br /> 0 t to 5(fine sant 0.6 2 1 1.6 <br /> Table 1 and ba tine sa <br /> MOUND CONTOUR LOADING RATES: 61015 0.76 1.6 1 1.6 <br /> Contour t6 to 30 0.6 2 0.76 2 <br /> M;aasurad � Ta«taro-dvrivod Loading ��:°�` 0.6 2.a o.76 2 <br /> Parc Rato mound absorption rat Rate: <br /> ac,to 60 0.46 2.6 0.6 2.6 <br /> s60mp' I.G. 1.3- 2.0. 2.4. 2.6 c12 51'0120 5 0.3 5.3 <br /> 61•120mpi OR 5.0 c12 <br /> 'Systems with these values are not Type I systems. <br /> -- 120 nip -s.o• _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: ft <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 ft 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 /> DEft210.0 <br /> 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 below and above pipe X Length X Width <br /> 0.757 ft X 50.0 ft X 10.0 ft= 375 ft} : 27 = 14 yd <br />