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OSTP Mound Design <br /> UNIVERSITY <br /> Minnesota Pollution I ERSITY <br /> Control Agency Worksheet > 1 % Slope � INNESOTA <br /> 1. SYSTEM SIZING: Project ID: <br /> v 03.19,15! <br /> A. Design Row: I 750 GPD TABLE IXa i <br /> B. Soil Loading Rate: I 0.60 !GPD/ft` LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> C. Depth to Limiting Condition: ! 1.3 Ift TreatmentLevelC Treatment Level A.A•2.6.' <br /> Abw non 1 <br /> Prrcoistson Rate D �O 1 InnI Mound <br /> D. Percent Land Slope: 6.0 G {Map Area toarhn8� Wound Art. <br /> I Rate Absorption Rate <br /> Absorption <br /> (i/pa/tri Ratio i Ratio <br /> E. Design Media Loading Rate: I 1.2 IGPD/ft2 . l >t i ' <br /> F. Mound Absorption Ratio: I 2.00 I i <br /> 1.2 1 1.6 1 I <br /> Table I a- =*a^, -e se 0.6 z t i.s <br /> i <br /> uz <br /> MOUND CONTOUR LOADING RATES; '' 0.78 5 1 1.6 <br /> Contour -5='� 0 6 <br /> moasuled -Nature•clamed <br /> 2 0.78 2 <br /> r <br /> Marc Rata mound absorption=axes Loading 0.5 2.4 0.78 2 <br /> Rate <br /> 0.46 2.8 0.6 2.6 <br /> SOiiv 1 1:. 13 2 J 2.4 2.5 ;ii 5 0.3 5.3 <br /> _rr ----� _.. <br /> A.1 121;'}c3 • P 5 r: -1a -.. <br /> *Systems with these values are not Type I systems. <br /> 1 v'} g : . 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 =ft' <br /> I750 !GPD : I 1.2 IGPD/ft' = I 625 Ift: <br /> If a larger dispersal media area is desired, enter size:! 630 Ift` <br /> B. Enter Dispersal Bed Width: I 10.0 Ift Can not exceed 10 feet <br /> C. Calculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> I 10 Ift2 X I 1.2 I <br /> GPD/ft' = I 12.0 !gal/ft Can not exceed Table 1 <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area : Bed Width = Bed Length <br /> I 630 Iftz : I 10.0 Ift =I 63.0 !ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Calculate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> I 10.0 Ift X I 2.0 I = I 20.0 I 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 /> I 20.0 Ift - I 10.0 Ift =1 10.0 Ift <br /> 4. DISTRIBUTION MEDIA: ROCK <br /> A. Media Volume: Media Depth below and above pipe X Length X Width <br /> 1 0.75 I ft XI 63.0 1ft X ( 10.0 Ift = i 473 l ft` _ 27 = 18 yd' <br />