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OSTP Mound Design <br /> UNIVERSITY <br /> Minnesota Pollution Worksheet > I % Slope OF MINNESOTA <br /> Control Agency 1. SYSTEM SIZING: Project ID: v 03.19.15 <br /> A. Design Flow: 750 GPD :TABLE IXa <br /> B. Soil Loading Rate: 0.45 GPO/ft` LOADING RATES POR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> Treatment Level C Treatment Level A,A-2,5,� <br /> C. Depth to Limiting Condition: 1.0 ft <br /> Percolation Rate Absorption Absorption <br /> Area Loading wound Area Loathn! Mound <br /> D. Percent Land Slope: 13,0 % ( ) Rate Absorption Rate Absorpbon <br /> (1Pd/ft') <br /> Ratio Ratio Ratio <br /> E. Design Media Loading Rate: 1.2 GPD/ft` , <br /> F. Mound Absorption Ratio: 2.60 1.2 1 1.8 1 <br /> ........... <br /> 1 06 2 1 16 <br /> Tablet , : :3 >, . 1 <br /> MOUND CONTOUR LOADING RATES. 0.78 1 6 1 1 6 <br /> Contoui 0.6 2 0.78 2 <br /> rloastir od TAeturo ,dot ivrtd t <br /> :_ <br /> .1,01:-.Rate OP mound absorption qtly LOadErktj 0.5 2.4 0.78 2 <br /> Rat*: 0.45 2.6 0,6 2.5 <br /> €01,1',., 1,G. 1 3 ..,) ..4 i h ..1. b 0.3 5.3 <br /> aaaaaaa�ra� 1 _ - - <br /> 61.12i; *IPI lFR a r, <br /> 'Systems with these values are not Type I systems. <br /> lacy r„ , s,Y. • F. 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 /> 750 GPD + 1.2 GPD/ft2 = 625 ft' <br /> If a larger dispersal media area is desired, enter size: 630 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/ft` = 12.0 gal/ft Can not exceed Table I <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area : Bed Width =Bed Length <br /> 630 ft2 = 10.0 ft = 63.0 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 /> 0.75 ft X 63.0 ft X 1 10.0 ft = 473 ft' = 27 = 18 yd-' <br />