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OSTP Mound Design <br /> Minnesota Pollution <br /> UNIVERSITY <br /> Control Agency Worksheet >1°/0 Slope OF MINNESOTA , ., <br /> 1. SYSTEM SIZING: <br /> A. Design Flow(Flow&Soil- 1.A) : 450 GPI) Table I <br /> MOUND CONTOUR LOADING RATES: <br /> B. Soil Loading Rate(Flow&Soil-3.C): 0.60 GPD/ft2 .eas redco:-tour <br /> s texture•derived <br /> C. '°r=Rate CR r,o nd abso-pvcr-atio <br /> Depth to Limiting Condition: 1.0 ft <br /> Load:- <br /> Rate: <br /> D. Percent Land Slope: 6.0 % Sem;: 1.0, 1.3,2.0,2.4,2.6 :12 <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 5:-l 20 r 1pi OR 5.0 .•:12 <br /> • <br /> F. Mound Absorption Ratio(1.E+1.8): 2.00 : 12C nip-s° >5.0' _6° <br /> G. Design Contour Loading Rate: 12.0 GPD/ft 'Systems <br /> with these values are t <br /> (From Table I-same as Linear Loading Rate) Contour <br /> I <br /> 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)=ft2 <br /> If a larger dispersal media <br /> 450 GPD=1 1.20 1GPD/ft2 = 375.0 ft2 <br /> area is desired,enter size: <br /> 380.0 ft2 <br /> B. Calculate Dispersal Bed Width:Contour Loading Rate (1.G)÷Design Media Loading Rate (1.E)=Bed Width <br /> 12.0 ft + 1,2 gpd/ft2 = 10.0 ft <br /> C. Calculate Dispersal Bed Length: Dispersal Bed Area (2.A)=Bed Width (2.B)=Bed Length <br /> 380.0 ft2 : 10.0 ft = 38,0 ft <br /> D. Select Dispersal Media: 0 Rock <br /> 0 Other Approved Media <br /> 3. ABSORPTION AREA SIZING - <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.8)X Mound Absorption Ratio (1.F)=Absorption Width <br /> 10.0 ft 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 (3.A)-Bed Width (2.8)=ft <br /> 20.0 ft - J 10.0 Jft = 10.0 ft <br /> Comments: <br /> Slope, CLR Choice,Material issues <br />