Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
OSTP Mound Design UNIVERSITY <br /> Minnesota Pollution Worksheet OF MINNESOTA `''* ;, <br /> Control Agency <br /> 1. SYSTEM SIZING: <br /> A. Design Flow(Design Summary IA): 450 GPO Table I <br /> MOUND CONTOUR LOADING RATES: <br /> B. Soil Loading Rate (Design Sum.2D): 0.45 GPD/ftz Contour <br /> Measured • Texture-derived <br /> Pero Rate OR mound absorption ratio <br /> C. Depth to Limiting Condition: 1.3 ft Loading <br /> Rate: <br /> D. Percent Land Slope (Design Sum. 213): 9.0 % 5 60mpi 1.0. 1.3,2.0,2.4,2.6 _12 <br /> E. Design Media Loading Rate: 1.2 GPD/ftz 61-120 OR 5.0 <12 <br /> • <br /> F. Mound Absorption Ratio: 2.6 120 mpi' >5.0= r.6. <br /> G. Design Contour Loading Rate: i 12 IGPD/ft <br /> 'Systems with these values are not Type I systems. <br /> (From Design Summary 2E-same as Linear Loading Rate) Contour Loading Rate is a recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Required Dispersal Bed Area:Design Flow (1.A):Design Media Loading Rate (1.E)=ftz <br /> If a larger dispersal media 450 GPO+1 1.2 IGPD/ftz = 375.0 ft2 <br /> area is desired,enter size: 380 ftz <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (1.G)_Design Media Loading Rate (1.E)=Bed Width <br /> 12 ft : 1.2 gpd/ftz = 10.0 <br /> C. Calculate Dispersal Bed Length: Dispersal Bed Area (2.A):Bed Width (2.B)=Bed Length <br /> 380.0 ftz + 10.0 ft = 38.0 ft <br /> D. Select Dispersal Media: <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.B)X Mound Absorption Ratio (1.F)=Absorption Width <br /> 10.0 ft X I 2.60 I = 26.0 ft <br /> B. For slopes from 0 to 1%, the Absorption Width is measured from the bed equally in both directions. <br /> Calculate Absorption Width Beyond the Bed:Absorption Width (3.A)-Bed Mdth (2.B)_2= Width beyond Bed <br /> ( N/A ft - N/A ft) : N/A = N/A ft <br /> C. For slopes>1%, the Absorption Width is measured downhill from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Width:Absorption Width (3.A)-Bed Width (2.B)=ft <br /> 26.0 Ift - 10.0 ft = 16.0 ft <br /> Comments: <br /> Slope, CLR Choice,Material issues <br />