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-IlkMound Design Worksheet <br />SCWiGiMINNESOTA POLLUTION <br />YMC �:7MI Nr _ 11 p/ Slope <br />M'•, CONTROL AGENCY <br />I /0 l F' <br />1. SYSTEM SIZING: Project ID: v 04.01.2020 <br />A. Design Flow: <br />750 GPD <br />B. Soil Loading Rate: <br />O.bO GPD/ft2 <br />C. Depth to Limiting Condition <br />1.0 ft <br />D. Percent Land Slope: <br />3.0 % <br />E. Design Media Loading Rate: <br />1.2 GPD/ft2 <br />F. Mound Absorption Ratio: <br />2.00 <br />Table I <br />MOUND CONTOUR LOADING RATES- <br />Moasurod <br />Treatment LevN C <br />TCxtura - dortrod <br />Abforytlgt <br />Maund <br />Area LwdinS Absorption <br />(NR,1 Ram <br />Contour <br />Pari Rato <br />OR <br />mound absorption ratio <br />01 to 5 <br />Loading <br />1.ti 1 <br />01 to 5 (hne SOHO <br />and �0�e hrlp Saadi <br />0.6 2 <br />Rata: <br />5 WWI <br />OR <br />i.0. 1.3. 2.o. 2.:. 2.6 <br />s12 <br />61-120 mpi <br />5.0 <br />112 <br />120 mpg <br />>5.0• <br />0.46 2.6 <br />TABLE IXa <br />LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br />AND ABSORPTION RATIOS USING PERCOLATION TESTS <br />Percolabon Rete <br />( 1 <br />Treatment LevN C <br />Treatment Levet A. A-2. 6. <br />Abforytlgt <br />Maund <br />Area LwdinS Absorption <br />(NR,1 Ram <br />Ab --*ion <br />lAorptb <br />Area ate Absorption <br />(�'i Ratio <br />1 <br />01 to 5 <br />1-2 1 <br />1.ti 1 <br />01 to 5 (hne SOHO <br />and �0�e hrlp Saadi <br />0.6 2 <br />61015 <br />0.7B 1.6 <br />1 1.6 <br />16 to 30 <br />CA 2 <br />0.78 2 <br />31 to 45 <br />0.6 2.4 <br />0.78 2 <br />45 t0 60 <br />0.46 2.6 <br />0.6 2.6 <br />61 t0 120 <br />- 6 <br />0.3 6.3 <br />"Systems with these values are not Type I systems. <br />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 <br />750 GPD y 1.2 GPD/ft2 = 625 ft, <br />If a larger dispersal media area is desired, enter size: fi25 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 <br />525 ft2 - [710.0 ft = 62.5 ft <br />3. ABSORPTION AREA SIZING <br />A. Calculate Absorption Width: Bed Width X Mound Absorption Ratio <br />10.0 Ift X 2.0 = 20.0 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 />20.0 Ift - 10.0 ft = 10.0 ft <br />4. DISTRIBUTION MEDIA: ROCK Project ID: <br />A. Rock Depth Below Distribution Pipe <br />6in 0.50 ft <br />