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05-27-2016 Septic Design
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Last modified
8/22/2023 5:09:37 PM
Creation date
9/28/2021 4:12:04 PM
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x Address Old
House Number
3010
Street Name
Somerset
Street Type
Lane
Address
3010 Somerset La
Document Type
Septic
PIN
0411723220029
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OSTP Mound Design <br />UNIVERSITY .� <br />Minnesota Pollution Wnrkehoot X10/ 4Z1nr-wo op 1\Al>\jm\ cgrn <br />L.OntrOl Agency - - - -- - • - - - - . i v ...'%W rw . - -- - <br />1. SYSTEM SIZING: Project ID: v 04.20.2016 <br />12 <br />13. <br />A. Design Flow: <br />B. Soil Loading Rate: <br />C. Depth to Limiting Condition <br />D. Percent Land Slope: <br />E. Design Media Loading Rate: <br />F. Mound Absorption Ratio: <br />750 GPD <br />0.45 GPD/ft` <br />1.0 ft <br />4.0 <br />1.2 GPD/ft2 <br />2.60 <br />Table I <br />MOUND CONTOUR LOADING RATES: <br />Meawled <br />Treatment <br />Texture derived <br />Treatment Levee <br />Contoul <br />Dere Rate <br />OR <br />mound absorption ratio <br />Mound <br />Absorption <br />Abse n <br />Ratio <br />Loading <br />1 <br />- <br />1 <br />Rate - <br />ate•i.60rnp' <br />i. 60111p' <br />OR <br />t.0. 1.3.2.0.2.4.2.6 <br />:t2 <br />61-120 nlpi <br />5.0 <br />12 <br />_ 120 rnpi' <br />-5.0' <br />:6- <br />TABLE IXa <br />LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br />AND ABSORPTION RATIOS USING PERCOLATION TESTS <br />Percolation Rate <br />(MPO <br />Treatment <br />Level C <br />Treatment Levee <br />A, A-2, B, <br />Absorption <br />Arca Load�n4 <br />Rate <br />(gpdM') <br />Abund <br />Absor� tio <br />Ratio <br />Absorption <br />Area Loading <br />Rate <br />Mound <br />Absorption <br />Abse n <br />Ratio <br />1 <br />- <br />1 <br />•,o., <br />1.2 <br />1 <br />1.6 <br />1 <br />1 to (hrle tars; <br />la -,a oa n tris �a�a• <br />0.6 <br />2 <br />1 <br />1.6 <br />jr, to <br />0.78 <br />1.5 <br />1 <br />1.6 <br />0.6 <br />2 <br />0.78 <br />2 <br />41 <br />0.5 <br />2.4 <br />0.78 <br />2 <br />rs: if f" <br />0.45 <br />2.6 <br />0.6 <br />2.6 <br />tO=' <br />5 <br />0.3 <br />5.3 <br />'Systems with these values are not Type I systems. <br />Contour Loading Rate (linear loading rate) is a <br />recommended value. <br />DISPERSAL MEDIA SIZING <br />A. Calculate Dispersal Bed Area: Design Flow _ Design Media Loading Rate = ft2 <br />750 GPD _ GPD/ft` = 625 ft2 <br />1.2 <br />If a larger dispersal media area is desired, enter size: 630 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 ft` X 1.2 GPD/ft` = 12.0 gal/ft Can not exceed Table 1 <br />D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area _ Bed Width = Bed Length <br />630 ft` _ [=ft = 63.0 ft <br />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 />14. DISTRIBUTION MEDIA: ROCK <br />A. Rock Media Depth Below Distribution Pipe <br />0.50 ft estimated volume of rock on mound materials page <br />
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