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� � � OSTP Mound Design <br /> UNIVERSITY <br /> Minnesota Pollution �yorksheet > 1 % Stope OF MINNESOTA � `-��; <br /> Control Agency �'�� - <br /> 1. SYSTEM SIZING: Project ID: v 06.12.13 <br /> a. Design Flow: 750 GPD TABLE IXa <br /> B. Soil Loading Rate: 0.60 GPD/ft2 LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TEST'S <br /> Treatment Level C TreatmeM Level A,A-2,8, <br /> C. Depth to Limiting Condition: 1.8 ft <br /> Percolation Rate Absorption Absorption <br /> Area Loading M°und prea Loading ��� <br /> �. Percent Land Slope: 3.0 % ���� eace �SOfPt1O" Rate ��rption <br /> (9A4/k=) Ratio (�ki� Ratio <br /> E. Design Media Loading Rate: 1.2 GPD/ftZ _ _ <br /> <0 1 1 1 <br /> F, Mound Absorption Ratio: 2,00 o't°5 ,.2 , ,.e , <br /> 0'.0 5(fine sand 0.6 2 � 1.6 <br /> Tab1e I antl loam hne sand <br /> MUUNU C��NTOUR LOAUfNG RATES: 'iO�5 o.�e �.s i �.s <br /> �.�eawred ' Texture-dazivod <br /> Cor,tour ���o'o o.s z o.7s 2 <br /> �erc Rato `�R ;�iound absorption ratio Loading si�o�s o.5 z.a o.�s 2 <br /> . RdtP: :y;�o gp 0.45 2.6 0.6 2.6 <br /> =hOrnG' I.0. I.3. 2.0. 2.-i. 2.6 _�z si to i=0 _ 5 0.3 5.3 <br /> , >�Zo - - - - <br /> 51-12Gmpi �:R 5.0 c12 <br /> . *Systems with these values are not Type I systems. <br /> . 11i,,;,�:. ,s.�. _6. 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=ftZ <br /> 750 GPD : 1.2 GPD/ftz = 625 ftz <br /> If a targer dispersal media area is desired, enter size: 630 ftz <br /> B. Enter Dispersal Bed Width: 10.0 ft Can not exceed 10 feet <br /> C. Catculate Contour Loading Rate: Bed Width X Design Media loading Rate <br /> 10 ftZ X 1•2 GPD/ftZ = 12.0 gal/ft Can not exceed Tab(e i <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area = Bed Width = Bed Length <br /> 630 ftz : 10.0 ft = 63.0 ft <br /> 3. ABSORPTION AREA SIZiNG <br /> A. Calcutate Absorption Width: Bed Width X Mound Absorption Ratio =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 upstope edge of the Bed. <br /> Calculate Downslope Absorption Width: Absorption Width - Bed Width <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> 4. DISTRIBUTION MEDIA: ROCK <br /> A. Media Volume: Media Depth X Length X Width <br /> 1.00 ft X 63.0 ft X 10.0 ft= 630 ft3 : 27 = 23 yd3 <br />